ELECTRICAL & POWER CONTROL

SECTION
POWER CONTROL SYSTEM
PCS B

E
CONTENTS
IPDM E/R PRECAUTION .............................................. 19 F

PRECAUTION ............................................... 3 PRECAUTIONS ................................................. 19

Precaution for Supplemental Restraint System G
PRECAUTIONS ................................................... 3 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
Precaution for Supplemental Restraint System SIONER" .................................................................19
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Precautions Necessary for Steering Wheel Rota-
SIONER" ................................................................... 3 H
tion After Battery Disconnection ..............................19
SYSTEM DESCRIPTION .............................. 4 SYSTEM DESCRIPTION ............................. 21
I
COMPONENT PARTS ........................................ 4 COMPONENT PARTS ...................................... 21
Component Parts Location ........................................ 4 Component Parts Location ......................................21
ECU DIAGNOSIS INFORMATION ............... 5 ECU DIAGNOSIS INFORMATION .............. 22 J

IPDM E/R ............................................................. 5 BCM ................................................................... 22

Reference Value ....................................................... 5 List of ECU Reference .............................................22 K
Fail-Safe .................................................................... 9
DTC Index .............................................................. 11 WIRING DIAGRAM ...................................... 23
WIRING DIAGRAM ...................................... 12 POWER DISTRIBUTION SYSTEM ................... 23 L
Wiring Diagram ........................................................23
IPDM E/R ............................................................12
Wiring Diagram ....................................................... 12 BASIC INSPECTION ................................... 25
PCS
DTC/CIRCUIT DIAGNOSIS ......................... 15 DIAGNOSIS AND REPAIR WORK FLOW ....... 25
Work Flow ................................................................25
U1000 CAN COMM CIRCUIT .............................15 N
DTC Logic ............................................................... 15 DTC/CIRCUIT DIAGNOSIS ......................... 28
B2098 IGNITION RELAY ON STUCK ...............16 B2614 ACC RELAY CIRCUIT ........................... 28
DTC Logic ............................................................... 16 DTC Logic ................................................................28 O

B2099 IGNITION RELAY OFF STUCK ..............17 B2615 BLOWER RELAY CIRCUIT .................. 29
DTC Logic ............................................................... 17 DTC Logic ................................................................29
P
REMOVAL AND INSTALLATION ............... 18 B2616 IGNITION RELAY CIRCUIT .................. 30
DTC Logic ................................................................30
IPDM E/R ............................................................18
Exploded View ........................................................ 18 B2618 BCM ....................................................... 31
POWER DISTRIBUTION SYSTEM DTC Logic ................................................................31

B261A PUSH-BUTTON IGNITION SWITCH .... 32

Revision: 2012 August PCS-1 C26

 DTC Logic ............................................................... 32 B26F6 BCM ....................................................... 35
DTC Logic ............................................................... 35
B26F1 IGNITION RELAY .................................. 33
DTC Logic ............................................................... 33 SYMPTOM DIAGNOSIS ............................ 36
B26F2 IGNITION RELAY .................................. 34 POWER DISTRIBUTION SYSTEM SYMP-
DTC Logic ............................................................... 34 TOMS ................................................................. 36
Symptom Table ....................................................... 36

Revision: 2012 August PCS-2 C26

 PRECAUTIONS
< PRECAUTION > [IPDM E/R]

PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT B
PRE-TENSIONER" INFOID:0000000008758806

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along C
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIR BAG” and
“SEAT BELT” of this Service Manual.
WARNING: D
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by E
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
F
Module, see “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors. G
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING: H
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing I
serious injury.
• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service. J

PCS

Revision: 2012 August PCS-3 C26

 COMPONENT PARTS
< SYSTEM DESCRIPTION > [IPDM E/R]

SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location INFOID:0000000008758807

JMMIA0624ZZ

1. IPDM E/R
A. Engine room (LH)

Revision: 2012 August PCS-4 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]

ECU DIAGNOSIS INFORMATION A

IPDM E/R
Reference Value INFOID:0000000008758808
B
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items. C

VALUES ON THE DIAGNOSIS TOOL

D
Monitor Item Condition Value/Status
Changes depending on engine
coolant temperature, air conditioner
RAD FAN REQ Engine idle speed 0 – 100 % E
operation status, vehicle speed,
etc.
A/C switch OFF Off
AC COMP REQ Engine running A/C switch ON
F
On
(Compressor is operating)
Lighting switch OFF Off
TAIL&CLR REQ G
Lighting switch 1ST, 2ND or AUTO (Light is illuminated) On
Lighting switch OFF Off
HL LO REQ
Lighting switch 2ND or AUTO (Light is illuminated) On H
Lighting switch other than HI and
Lighting switch 2ND or AUTO (light Off
HL HI REQ PASS
is illuminated)
Lighting switch HI or PASS On I
Lighting switch 1ST, 2ND or Front fog lamp switch OFF Off
FR FOG REQ
AUTO (Light is illuminated) Front fog lamp switch ON On
J
Front wiper switch OFF Stop
Front wiper switch INT 1LOW
FR WIP REQ Ignition switch ON
Front wiper switch LO Low K
Front wiper switch HI Hi
Front wiper stop position STOP P
WIP AUTO STOP Ignition switch ON L
Any position other than front wiper
ACT P
stop position
Front wiper operates normally. Off
WIP PROT Ignition switch ON PCS
Front wiper stops at fail-safe opera-
BLOCK
tion.
Ignition switch OFF or ACC Off
IGN RLY1 -REQ N
Ignition switch ON On
Ignition switch OFF or ACC Off
IGN RLY
Ignition switch ON On O
Release the push-button ignition switch Off
PUSH SW
Press the push-button ignition switch On
P
Selector lever in any position other
Off
INTER/NP SW Ignition switch ON than P or N
Selector lever in P or N position On
Ignition switch ON Off
ST RLY CONT
At engine cranking On

Revision: 2012 August PCS-5 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
Monitor Item Condition Value/Status
Ignition switch ON Off
IHBT RLY -REQ
At engine cranking On
Ignition switch ON Off
At engine cranking INHI ON → ST ON
ST/INHI RLY
The status of starter relay or starter control relay cannot be recognized by
the battery voltage malfunction, etc. when the starter relay is ON and the UNKWN
starter control relay is OFF.
• Press the selector button with se-
lector lever in P position.
Ignition switch ON Off
DETENT SW • Selector lever in any position oth-
er than P.
Release the selector button with selector lever in P position. On
None of the conditions below are present. Off
• Open the driver door after the ignition switch is turned OFF (for a few
S/L RLY -REQ seconds).
On
• Press the push-button ignition switch when the steering lock is activat-
ed.
Steering lock is locked. LOCK
S/L STATE Steering lock is unlocked. UNLK
[DTC: B210A] is detected. UNKWN
NOTE:
OIL P SW Open
This item is indicated, but not monitored.

TERMINAL LAYOUT

JMMIA0817ZZ

PHYSICAL VALUES

Revision: 2012 August PCS-6 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]

Terminal NO. Description A

(Wire color) Value
Input/ Condition
Signal name (Approx.)
+ – Output
1 B
Ground Battery power supply Input Ignition switch OFF 6 – 16 V
(R)
2
Ground Battery power supply Input Ignition switch OFF 6 – 16 V
(G) C
3 Other than engine cranking 0–1V
Ground Starter motor Output
(GR) At engine cranking 6 – 16 V
4 D
Ground Battery power supply Input Ignition switch OFF 9 – 16 V
(R)
9
Ground Ground — Ignition switch ON 0–1V
(B) E
Rear window defogger switch
Ignition 0–1V
14 OFF
Ground Rear window defogger Output switch
(R) Rear window defogger switch F
ON 9 – 16 V
ON
18
Ground Ground — Ignition switch ON 0–1V
(B) G
Lighting Front fog lamp switch OFF 0–1V
19 switch
Ground Front fog lamp (RH) Output
(W) 1ST, 2ND Front fog lamp switch ON 9 – 16 V H
or AUTO
Lighting Front fog lamp switch OFF 0–1V
20 switch
Ground Front fog lamp (LH) Output I
(L) 1ST, 2ND Front fog lamp switch ON 9 – 16 V
or AUTO

Ignition Front wiper stop position 0 – 1.5 V

25 Front wiper stop posi- J
Ground Input switch Any position other than front
(BR) tion 9 – 16 V
ON wiper stop position
26 Input/
Ground CAN-L — —
(P) Output K
27 Input/
Ground CAN-H — —
(L) Output
At engine cranking 0–1V L
30
Ground Starter relay control Output
(SB) Other than at engine cranking 6 – 16 V
• Approximately 1 second after turning the
ignition switch ON 0–1V
PCS
31 Fuel pump relay con- • Engine running
Ground Output
(R) trol
Approximately 1 second or more after turn-
6 – 16 V N
ing the ignition switch ON

32 Open the hood 0–1V

Ground Hood switch Input
(W) Close the hood 9 – 16 V
O
Ignition switch OFF
(More than a few seconds after turning igni- 0–1V
tion switch OFF)
35 ECM relay power sup- P
Ground Output • Ignition switch ON
(G) ply
• Ignition switch OFF
6 – 16 V
(For a few seconds after turning ignition
switch OFF)

Revision: 2012 August PCS-7 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
Terminal NO. Description
(Wire color) Value
Input/ Condition
Signal name (Approx.)
+ – Output
Ignition switch OFF
(More than a few seconds after turning igni- 0–1V
tion switch OFF)
36 ECM relay power sup-
Ground Output • Ignition switch ON
(L) ply
• Ignition switch OFF
6 – 16 V
(For a few seconds after turning ignition
switch OFF)

37 Lighting switch OFF 0–1V

Ground Parking lamp (RH) Output
(GR) Lighting switch 1ST 9 – 16 V
Ignition Front wiper switch OFF 0–1V
39
Ground Front wiper HI Output switch
(V) Front wiper switch HI 9 – 16 V
ON
Ignition switch OFF
(More than a few seconds after turning igni- 6 – 16 V
tion switch OFF)
41
Ground ECM relay control Input • Ignition switch ON
(P)
• Ignition switch OFF
0–1V
(For a few seconds after turning ignition
switch OFF)
42
Ground ECM power supply Output Ignition switch OFF 6 – 16 V
(BR)

43 Lighting switch OFF 0–1V

Ground Parking lamp (LH) Output
(G) Lighting switch 1ST 9 – 16 V

44 Tail lamp, license plate Lighting switch OFF 0–1V

Ground Output
(BG) lamp and illuminations Lighting switch 1ST 9 – 16 V
Ignition Front wiper switch OFF 0–1V
45
Ground Front wiper LO Output switch
(Y) Front wiper switch LO 9 – 16 V
ON
Ignition switch ACC or ON 0–1V
Ignition
A few seconds after opening
switch 9 – 16 V
46 Steering lock unit pow- the driver door
Ground Output OFF
(SB) er supply
Ignition
Press the push-button ignition
switch 9 – 16 V
switch
LOCK
Select lever in any position other than P or
48 Transmission range 0–1V
Ground Input N (Ignition switch ON)
(V) switch
Select lever P or N (Ignition switch ON) 9 – 16 V
Ignition Lighting switch OFF 0–1V
49 switch
Ground Headlamp HI (RH) Output • Lighting switch HI
(Y) 2ND or 9 – 16 V
AUTO • Lighting switch PASS

Ignition Lighting switch OFF 0–1V

50 switch
Ground Headlamp HI (LH) Output • Lighting switch HI
(L) 2ND or 9 – 16 V
AUTO • Lighting switch PASS

51 Lighting switch OFF 0–1V

(G)*1 Ground Headlamp LO (LH) Output
Lighting switch 2ND 9 – 16 V
(BR)*2

52 Lighting switch OFF 0–1V

Ground Headlamp LO (RH) Output
(V) Lighting switch 2ND 9 – 16 V

Revision: 2012 August PCS-8 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
Terminal NO. Description
(Wire color) Value A
Input/ Condition
Signal name (Approx.)
+ – Output
Approximately 1 second or more than after
0–1V B
turning the ignition switch ON
54 Fuel pump power sup-
Ground Output • Approximately 1 second after turning the
(W) ply
ignition switch ON 6 – 16 V
• Engine running C
Ignition switch OFF
(More than a few seconds after turning igni- 0–1V
tion switch OFF) D
55 Throttle control motor
Ground Output • Ignition switch ON
(W) relay power supply
• Ignition switch OFF
6 – 16 V
(For a few seconds after turning ignition
switch OFF) E
A/C switch OFF 0–1V
56 Engine
Ground A/C relay power supply Output A/C switch ON
(GR) running 9 – 16 V F
(A/C compressor is operating)

57 Ignition relay power Ignition switch OFF 0–1V

Ground Output
(P) supply Ignition switch ON 6 – 16 V
G
60 Throttle control motor Ignition switch OFF 6 – 16 V
Ground Output
(V) relay control Ignition switch ON 0–1V
Ignition switch OFF 0–1V H
61 Ignition relay power
Ground Output
(LG) supply Ignition switch ON 6 – 16 V

63 Steering lock unit con- Steering lock is locked 9 – 16 V

Ground Input I
(P) dition-2 Steering lock is unlocked 0–1V
Release select
Ignition 0–1V
button J
64 CVT shift selector switch Select lever P
Ground Input ON Press select
(W) (Detention switch)
button 9 – 16 V
Select lever in any position other than P K
65 Steering lock unit con- Steering lock is locked 0–1V
Ground Input
(Y) dition-1 Steering lock is unlocked 6 – 16 V
Press the push-button ignition switch 0–1V
L
66 Push-button ignition
Ground Input
(BR) switch Release the push-button ignition switch 6 – 16 V
Ignition switch OFF or ACC 9 – 16 V PCS
67 Cooling fan relay con-
Ground Output Ignition switch ON
(L) trol 0–1V
Cooling fan operated

68 Ignition switch OFF or ACC 6 – 16 V N

Ground Ignition relay control Output
(G) Ignition switch ON 0–1V
72
Ground Cooling fan control Output Engine idling 0–5V O
(GR)

*1: Xenon headlamp models

*2: Halogen headlamp models P
Fail-Safe INFOID:0000000008758809

CAN COMMUNICATION CONTROL

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With ECM

Revision: 2012 August PCS-9 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]

Control part Fail-safe operation

• Transmits the pulse duty signal (PWM signal) 100 % when the ignition switch is turned ON.
Cooling fan
• Transmits the pulse duty signal (PWM signal) 0 % when the ignition switch is turned OFF.
A/C compressor A/C relay OFF

If No CAN Communication Is Available With BCM

Control part Fail-safe operation

• Turns ON the headlamp low relay when the ignition switch is turned ON
Headlamp • Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF
• Parking lamp
• License plate lamp • Turns ON the tail lamp relay when the ignition switch is turned ON
• Illumination • Turns OFF the tail lamp relay when the ignition switch is turned OFF
• Tail lamp
• The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while
the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is activated
Front wiper motor
while the front wiper is set in the INT mode and the front wiper motor is operating.
• Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control is activated
while front wiper motor is operated and wiper stop in the other position than stop position.
Front fog lamp Front fog lamp relay OFF
Horn Horn OFF
Ignition relay The status just before activation of fail-safe is maintained.
Starter motor Starter control relay OFF
Steering lock unit Steering lock relay OFF
Rear window defogger Rear window defogger relay OFF

IGNITION RELAY MALFUNCTION DETECTION FUNCTION

• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.

Voltage judgment
Ignition relay contact Ignition relay excitation IPDM E/R judgment Operation
side coil side
ON ON Ignition relay ON normal —
OFF OFF Ignition relay OFF normal —
• Detects DTC “B2098: IGN RELAY ON”
ON OFF Ignition relay ON stuck
• Turns ON the tail lamp relay for 10 minutes
OFF ON Ignition relay OFF stuck Detects DTC “B2099: IGN RELAY OFF”

FRONT WIPER PROTECTION FUNCTION

IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop.

Ignition switch Front wiper switch Front wiper stop position signal
OFF The front wiper stop position signal (stop position) cannot be input for 10 seconds.
ON
ON The front wiper stop position signal does not change for 10 seconds.
NOTE:
This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item
“WIP PROT” while the wiper is stopped.

Revision: 2012 August PCS-10 C26

 IPDM E/R
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains A
active for 90 seconds.
DTC Index INFOID:0000000008758810
B
NOTE:
• The details of time display are as follows.
- CRNT: A malfunction is detected now. C
- PAST: A malfunction was detected in the past.
• IGN counter is displayed on FFD (Freeze Frame Data).
- The number is 0 when is detected now.
- The number increases like 1 → 2 ··· 38 → 39 after returning to the normal condition whenever IGN OFF → D
ON.
- The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
×: Applicable E
CONSULT display Fail-safe Refer to
No DTC is detected.
further testing — — F
may be required.
U1000: CAN COMM CIRCUIT × PCS-15
B2098: IGN RELAY ON × PCS-16 G
B2099: IGN RELAY OFF — PCS-17
B2108: S/L RELAY ON — SEC-59
H
B2109: S/L RELAY OFF — SEC-60
B210A: S/L STATE SW — SEC-61
B210B: START CONT RLY ON — SEC-62 I
B210C: START CONT RLY OFF — SEC-63
B210D: STARTER RELAY ON — SEC-64
J
B210E: STARTER RELAY OFF — SEC-65
B210F: INTRLCK/PNP SW ON — SEC-66
B2110: INTRLCK/PNP SW OFF — SEC-67 K

PCS

Revision: 2012 August PCS-11 C26

 IPDM E/R
< WIRING DIAGRAM > [IPDM E/R]

WIRING DIAGRAM
IPDM E/R
Wiring Diagram INFOID:0000000008758811

For connector terminal arrangements, harness layouts, and alphabets in a (option abbreviation; if not
described in wiring diagram), refer to GI-5, "Connector Information/Explanation of Option Abbreviation".

JRMWD2885JP

Revision: 2012 August PCS-12 C26

 IPDM E/R
< WIRING DIAGRAM > [IPDM E/R]

PCS

JRMWD2886JP

Revision: 2012 August PCS-13 C26

 IPDM E/R
< WIRING DIAGRAM > [IPDM E/R]

JRMWD2887JP

Revision: 2012 August PCS-14 C26

 U1000 CAN COMM CIRCUIT
< DTC/CIRCUIT DIAGNOSIS > [IPDM E/R]

DTC/CIRCUIT DIAGNOSIS A
U1000 CAN COMM CIRCUIT
DTC Logic INFOID:0000000008758812
B

DTC DETECTION LOGIC

C
CONSULT display de-
DTC DTC Detection Condition Possible cause
scription
When IPDM E/R cannot communicate CAN communi-
U1000 CAN COMM CIRCUIT CAN communication system D
cation signal continuously for 2 seconds or more

PCS

Revision: 2012 August PCS-15 C26

 B2098 IGNITION RELAY ON STUCK
< DTC/CIRCUIT DIAGNOSIS > [IPDM E/R]
B2098 IGNITION RELAY ON STUCK
DTC Logic INFOID:0000000008758813

DTC DETECTION LOGIC

CONSULT display
DTC DTC Detection Condition Possible causes
description
The ignition relay ON is detected for 1 second at ignition switch OFF
B2098 IGN RELAY ON (CPU monitors the status at the contact and excitation coil circuits Ignition relay malfunction
of the ignition relay inside it)

Revision: 2012 August PCS-16 C26

 B2099 IGNITION RELAY OFF STUCK
< DTC/CIRCUIT DIAGNOSIS > [IPDM E/R]
B2099 IGNITION RELAY OFF STUCK
A
DTC Logic INFOID:0000000008758814

DTC DETECTION LOGIC B

CONSULT display
DTC DTC Detection Condition Possible causes
description C
The ignition relay OFF is detected for 1 second at ignition switch ON
B2099 IGN RELAY OFF (CPU monitors the status at the contact and excitation coil circuits of Ignition relay malfunction
the ignition relay inside it)
D
NOTE:
When IPDM E/R power supply voltage is low (Approx. 7 - 8 V for about 1 second), the “DTC: B2099” may be detected.

PCS

Revision: 2012 August PCS-17 C26

 IPDM E/R
< REMOVAL AND INSTALLATION > [IPDM E/R]

REMOVAL AND INSTALLATION

IPDM E/R
Exploded View INFOID:0000000008758815

JMMIA0458ZZ

1. IPDM E/R 2. IPDM E/R cover A 3. IPDM E/R cover B

Revision: 2012 August PCS-18 C26

 PRECAUTIONS
< PRECAUTION > [POWER DISTRIBUTION SYSTEM]

PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT B
PRE-TENSIONER" INFOID:0000000008758816

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along C
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIR BAG” and
“SEAT BELT” of this Service Manual.
WARNING: D
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by E
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
F
Module, see “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors. G
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING: H
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing I
serious injury.
• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service. J
Precautions Necessary for Steering Wheel Rotation After Battery Disconnection
INFOID:0000000008758817

K
CAUTION:
Comply with the following cautions to prevent any error and malfunction.
• Before removing and installing any control units, first turn the ignition switch to the LOCK position,
then disconnect both battery cables. L
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect
both battery cables.
• Always use CONSULT to perform self-diagnosis as a part of each function inspection after finishing PCS
work. If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the operation pro- N
cedure below before starting the repair operation.
OPERATION PROCEDURE
O
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
P
2. Turn the ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.

Revision: 2012 August PCS-19 C26

 PRECAUTIONS
< PRECAUTION > [POWER DISTRIBUTION SYSTEM]
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the ignition switch from ACC position to ON position, then to LOCK position. (The steering wheel will lock
when the ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT.

Revision: 2012 August PCS-20 C26

 COMPONENT PARTS
< SYSTEM DESCRIPTION > [POWER DISTRIBUTION SYSTEM]

SYSTEM DESCRIPTION A
COMPONENT PARTS
Component Parts Location INFOID:0000000008758818
B

JMMIA0800ZZ
H
1. IPDM E/R 2. Push-button ignition switch 3. Stop lamp switch
Refer to PCS-4, "Component Parts Refer to BRC-9, "Component Parts
Location". Location".
I
4. Transmission range switch 5. BCM
Refer to SEC-4, "Component Parts Refer to BCS-3, "BODY CONTROL
Location". SYSTEM : Component Parts Loca-
tion". J

PCS

Revision: 2012 August PCS-21 C26

 BCM
< ECU DIAGNOSIS INFORMATION > [POWER DISTRIBUTION SYSTEM]

ECU DIAGNOSIS INFORMATION

BCM
List of ECU Reference INFOID:0000000008758819

ECU Reference
BCS-5, "Reference Value"
BCS-25, "Fail-safe"
BCM
BCS-27, "DTC Inspection Priority Chart"
BCS-28, "DTC Index"

Revision: 2012 August PCS-22 C26

 POWER DISTRIBUTION SYSTEM
< WIRING DIAGRAM > [POWER DISTRIBUTION SYSTEM]

WIRING DIAGRAM A
POWER DISTRIBUTION SYSTEM
Wiring Diagram INFOID:0000000008758820
B
For connector terminal arrangements, harness layouts, and alphabets in a (option abbreviation; if not
described in wiring diagram), refer to GI-5, "Connector Information/Explanation of Option Abbreviation".
C

PCS

JRMWD2891JP

Revision: 2012 August PCS-23 C26

 POWER DISTRIBUTION SYSTEM
< WIRING DIAGRAM > [POWER DISTRIBUTION SYSTEM]

JRMWD2892JP

Revision: 2012 August PCS-24 C26

 DIAGNOSIS AND REPAIR WORK FLOW
< BASIC INSPECTION > [POWER DISTRIBUTION SYSTEM]

BASIC INSPECTION A
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow INFOID:0000000008838741
B

OVERALL SEQUENCE
C

PCS

JMKIA8652GB

DETAILED FLOW

Revision: 2012 August PCS-25 C26

 DIAGNOSIS AND REPAIR WORK FLOW
< BASIC INSPECTION > [POWER DISTRIBUTION SYSTEM]

1.GET INFORMATION ABOUT SYMPTOM

Get detailed information from the customer about the symptom (the condition and the environment when the
incident/malfunction occurs).

>> GO TO 2.
2.CHECK DTC
1. Check DTC for BCM and IPDM E/R.
2. Perform the following procedure if DTC is displayed.
- Record DTC and freeze frame data (Print them out with CONSULT.)
- Erase DTC.
- Study the relationship between the cause detected by DTC and the symptom described by the customer.
3. Check related service bulletins for information.
Are any symptoms described and any DTC detected?
Symptom is described, DTC is displayed>>GO TO 3.
Symptom is described, DTC is not displayed>>GO TO 4.
Symptom is not described, DTC is displayed>>GO TO 5.
3.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT to the vehicle in the “DATA MONITOR” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.
4.CONFIRM THE SYMPTOM
Confirm the symptom described by the customer.
Connect CONSULT to the vehicle in the “DATA MONITOR ” mode and check real time diagnosis results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.
5.PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
At this time, always connect CONSULT to the vehicle, and check diagnostic results in real time.
If two or more DTCs are detected, refer to BCS-27, "DTC Inspection Priority Chart", and determine trouble
diagnosis order.
NOTE:
Perform Component Function Check if DTC Confirmation Procedure is not included in Service Manual. This
simplified check procedure is an effective alternative, although DTC cannot be detected during this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC Confirmation
Procedure.
Is DTC detected?
YES >> GO TO 7.
NO >> Check intermittent incident.
6.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS
Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
4, and determine the trouble diagnosis order based on possible causes and symptom.

>> GO TO 7.
7.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.

Revision: 2012 August PCS-26 C26

 DIAGNOSIS AND REPAIR WORK FLOW
< BASIC INSPECTION > [POWER DISTRIBUTION SYSTEM]
Is malfunctioning part detected?
YES >> GO TO 8. A
NO >> Check voltage of related BCM terminals using CONSULT.
8.REPAIR OR REPLACE THE MALFUNCTIONING PART
B
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it. C

>> GO TO 9.
D
9.FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check
again, and then check that the malfunction is repaired securely. E
When symptom was described by the customer, refer to confirmed symptom in step 3 or 4, and check that the
symptom is not detected.
Does the symptom reappear? F
YES (DTC is detected)>>GO TO 7.
YES (Symptom remains)>>GO TO 6.
NO >> INSPECTION END
G

PCS

Revision: 2012 August PCS-27 C26

 B2614 ACC RELAY CIRCUIT
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]

DTC/CIRCUIT DIAGNOSIS
B2614 ACC RELAY CIRCUIT
DTC Logic INFOID:0000000008758822

DTC DETECTION LOGIC

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
• Harness or connectors
An immediate operation of accessory relay is re- (Accessory relay circuit is open or
B2614 BCM quested by BCM, but there is no response for more shorted)
than 2 seconds. • BCM
• Accessory relay

Revision: 2012 August PCS-28 C26

 B2615 BLOWER RELAY CIRCUIT
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B2615 BLOWER RELAY CIRCUIT
A
DTC Logic INFOID:0000000008758823

DTC DETECTION LOGIC B

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name C
• Harness or connectors
BCM detects a difference of signal for 1 second or
(Front blower relay circuit is open
more between the following items.
B2615 BCM or shorted)
• Front blower relay ON/OFF request D
• BCM
• Front blower relay feedback
• Front blower relay

PCS

Revision: 2012 August PCS-29 C26

 B2616 IGNITION RELAY CIRCUIT
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B2616 IGNITION RELAY CIRCUIT
DTC Logic INFOID:0000000008758824

DTC DETECTION LOGIC

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
• Harness or connectors
An immediate operation of ignition relay is request- (Ignition relay circuit is open or
B2616 BCM ed by BCM, but there is no response for more than shorted)
1 second • BCM
• Ignition relay

Revision: 2012 August PCS-30 C26

 B2618 BCM
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B2618 BCM
A
DTC Logic INFOID:0000000008758825

DTC DETECTION LOGIC B

NOTE:
• If DTC B2618 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-38, "DTC Logic". C
• If DTC B2618 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-39, "DTC Logic".

Trouble diagnosis D
DTC No. DTC detecting condition Possible cause
name
• Harness or connectors
The following status are compared, and it does not agree for 1
[Ignition relay (IPDM E/R) E
second or more.
B2618 BCM control signal circuit]
• State of ignition relay (IPDM E/R) control judgment in BCM
• BCM
• State of ignition relay (IPDM E/R) control signal
• IPDM E/R
F

PCS

Revision: 2012 August PCS-31 C26

 B261A PUSH-BUTTON IGNITION SWITCH
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
DTC Logic INFOID:0000000008758826

DTC DETECTION LOGIC

NOTE:
• If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-38, "DTC Logic".
• If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-39, "DTC Logic".

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
• Harness or connectors
BCM detects a difference of signal for 1 second or
(Push-button ignition switch circuit
more between the following items.
B261A PUSH-BTN IGN SW is open or shorted.)
• Push-button ignition switch signal
• BCM
• Push-button ignition switch status signal (CAN)
• IPDM E/R

Revision: 2012 August PCS-32 C26

 B26F1 IGNITION RELAY
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B26F1 IGNITION RELAY
A
DTC Logic INFOID:0000000008758827

DTC DETECTION LOGIC B

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name C
BCM transmits the ignition relay control signal • Harness or connectors
(ON: 0 V) or ignition switch ON signal (ON) (Ignition relay circuit is open)
B26F1 IGN RELAY OFF
(CAN), but does not receives ignition switch • BCM
ON signal (ON) (CAN) from IPDM E/R. • IPDM E/R D

PCS

Revision: 2012 August PCS-33 C26

 B26F2 IGNITION RELAY
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B26F2 IGNITION RELAY
DTC Logic INFOID:0000000008758828

DTC DETECTION LOGIC

Trouble diagnosis
DTC No. DTC detecting condition Possible cause
name
BCM transmits the ignition relay control signal • Harness or connectors
(OFF: 12 V) or ignition switch ON signal (OFF) (Ignition relay circuit is short)
B26F2 IGN RELAY ON
(CAN), but does not receives ignition switch • BCM
ON signal (OFF) (CAN) from IPDM E/R. • IPDM E/R

Revision: 2012 August PCS-34 C26

 B26F6 BCM
< DTC/CIRCUIT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
B26F6 BCM
A
DTC Logic INFOID:0000000008758829

DTC DETECTION LOGIC B

NOTE:
• If DTC B26F6 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-38, "DTC Logic". C
• If DTC B26F6 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-39, "DTC Logic".

Trouble diagnosis D
DTC No. DTC detecting condition Possible cause
name
Ignition relay ON signal is not transmitted from IPDM E/
B26F6 BCM BCM
R when BCM turns ignition relay ON. E

PCS

Revision: 2012 August PCS-35 C26

 POWER DISTRIBUTION SYSTEM SYMPTOMS
< SYMPTOM DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]

SYMPTOM DIAGNOSIS
POWER DISTRIBUTION SYSTEM SYMPTOMS
Symptom Table INFOID:0000000008758830

Possible cause location/Trouble shoot-

Symptom Check items
ing
• Perform “INSIDE ANT DIAGNOSIS” on Work
• Push-button ignition switch
Push-button ignition switch does not Support of “INTELLIGENT KEY”.
• Push-button ignition switch circuit
operate • Perform Self-Diagnosis Result of “BCM”.
• BCM
• Check push-button ignition switch
• Fuse
Push-button ignition switch position in- • Push-button ignition switch circuit
Check push-button ignition switch indicator
dicator does not illuminate • Push-button ignition switch
• BCM

Revision: 2012 August PCS-36 C26