TROUBLE DIAGNOSIS
Circuit Diagram UBS00KVC
BBWA1720E
Revision: October 2004 EC-114 2005 Titan
TROUBLE DIAGNOSIS
EC
BBWA1721E
Revision: October 2004 EC-115 2005 Titan
TROUBLE DIAGNOSIS
ECM Harness Connector Terminal Layout UBS00KVD
MBIB0045E
ECM Terminals and Reference Value UBS00KVE
PREPARATION
1. ECM is located in the engine room passenger side behind bat-
tery.
2. Remove ECM harness connector.
BBIA0386E
3. When disconnecting ECM harness connector, loosen it with
levers as far as they will go as shown in the figure.
4. Connect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.
● Use extreme care not to touch 2 pins at one time.
● Data is for comparison and may not be exact.
BBIA0387E
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
[Engine is running]
1 B ECM ground Body ground
● Idle speed
Approximately 5V
[Engine is running]
A/F sensor 1 heater
2 O/B ● Warm-up condition
(bank 1)
● Idle speed
PBIB1584E
Revision: October 2004 EC-116 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage) A
COLOR
NO.
Throttle control motor relay BATTERY VOLTAGE
3 L [Ignition switch: ON]
power supply (11 - 14V) EC
0 - 14V
[Ignition switch: ON]
C
● Engine: Stopped
4 L/W Throttle control motor (Close)
● Selector lever: D
● Accelerator pedal: Fully released
D
PBIB1104E
0 - 14V
E
[Ignition switch: ON]
● Engine: Stopped
5 L/B Throttle control motor (Open)
● Selector lever: D F
● Accelerator pedal: Fully depressed
PBIB1105E
G
[Engine is running]
● Warm-up condition
● Engine speed is below 3,600 rpm after the H
following conditions are met. 0 - 1.0V
– Keeping the engine speed between 3,500
Heated oxygen sensor 2 and 4,000 rpm for 1 minute and at idle for 1
6 GR
heater (bank 1) minute under no load I
[Ignition switch: ON]
● Engine: Stopped BATTERY VOLTAGE
(11 - 14V) J
[Engine is running]
● Engine speed: Above 3,600 rpm
[Engine is running]
0.5 - 4.5V K
Power steering pressure sen- ● Steering wheel: Being turned
12 R
sor [Engine is running]
0.4 - 0.8V
● Steering wheel: Not being turned L
Approximately 10V
[Engine is running]
● Warm-up condition M
● Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
PBIB1041E
Crankshaft position sensor
13 O
(POS)
Approximately 10V
[Engine is running]
● Engine speed: 2,000 rpm
PBIB1042E
Revision: October 2004 EC-117 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
1.0 - 4.0V
[Engine is running]
● Warm-up condition
● Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
PBIB1039E
Camshaft position sensor
14 Y
(PHASE)
1.0 - 4.0V
[Engine is running]
● Engine speed: 2,000 rpm
PBIB1040E
[Engine is running]
15 W Knock sensor (bank 1) Approximately 2.5V
● Idle speed
16 BR/R Approximately 3.1V
[Engine is running]
35 BR/G Approximately 2.6V
A/F sensor 1 (bank 1) ● Warm-up condition
56 LG/B Approximately 2.3V
● Idle speed
75 P/B Approximately 2.3V
BATTERY VOLTAGE
[Engine is running] (11 - 14V)
● Warm-up condition
● Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
21 O/L Injector No. 5
SEC984C
22 BR Injector No. 3
23 GR/W Injector No. 1 BATTERY VOLTAGE
44 O Injector No. 7
(11 - 14V)
[Engine is running]
● Warm-up condition
● Engine speed: 2,000 rpm
SEC985C
Approximately 5V
[Engine is running]
A/F sensor 1 heater
24 BR/W ● Warm-up condition
(bank 2)
● Idle speed
PBIB1584E
Revision: October 2004 EC-118 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage) A
COLOR
NO.
[Engine is running]
● Warm-up condition EC
● Engine speed is below 3,600 rpm after the
following conditions are met. 0 - 1.0V
– Keeping the engine speed between 3,500 C
Heated oxygen sensor 2 and 4,000 rpm for 1 minute and at idle for 1
25 O/G
heater (bank 2) minute under no load
[Ignition switch: ON]
D
● Engine: Stopped BATTERY VOLTAGE
[Engine is running] (11 - 14V)
● Engine speed: Above 3,600 rpm E
EVAP control system pres-
32 L [Ignition switch: ON] Approximately 1.8 - 4.8V
sure sensor
Approximately 0 - 4.8V F
34 R/B Intake air temperature sensor [Engine is running] Output voltage varies with intake
air temperature.
[Engine is running]
36 W Knock sensor (bank 2) Approximately 2.5V G
● Idle speed
BATTERY VOLTAGE
[Engine is running] (11 - 14V) H
● Warm-up condition
● Idle speed
NOTE: I
The pulse cycle changes depending on rpm
at idle
40 Y/G Injector No. 6
41 P Injector No. 4 SEC984C
J
42 L Injector No. 2 BATTERY VOLTAGE
63 G Injector No. 8
(11 - 14V)
K
[Engine is running]
● Warm-up condition
● Engine speed: 2,000 rpm
L
SEC985C
BATTERY VOLTAGE M
(11 - 14V)
[Engine is running]
● Idle speed
● Accelerator pedal: Not depressed even
slightly, after engine starting
EVAP canister purge volume SEC990C
45 L/Y
control solenoid valve BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
● Engine speed: About 2,000 rpm (More than
100 seconds after starting engine)
SEC991C
Revision: October 2004 EC-119 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
Sensor power supply
47 Y [Ignition switch: ON] Approximately 5V
(Throttle position sensor)
Sensor power supply
48 SB (EVAP control system pres- [Ignition switch: ON] Approximately 5V
sure sensor)
Sensor power supply
49 R/Y [Ignition switch: ON] Approximately 5V
(Refrigerant pressure sensor)
[Ignition switch: ON]
● Engine: Stopped
More than 0.36V
● Selector lever: D
● Accelerator pedal: Fully released
50 B Throttle position sensor 1
[Ignition switch: ON]
● Engine: Stopped
Less than 4.75V
● Selector lever: D
● Accelerator pedal: Fully depressed
[Engine is running]
● Warm-up condition 1.0 - 1.3V
● Idle speed
51 W Mass air flow sensor
[Engine is running]
● Warm-up condition 1.7 - 2.1V
● Engine speed: 2,500 rpm
[Engine is running]
● Warm-up condition
● Revving engine from idle to 3,000 rpm
Heated oxygen sensor 2 quickly after the following conditions are
55 R 0 - Approximately 1.0V
(bank 1) met.
– After keeping the engine speed between
3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
57 L/P Approximately 2.6V
[Engine is running]
58 GR/G Approximately 2.3V
A/F sensor 1 (bank 2) ● Warm-up condition
76 G/L Approximately 3.1V
● Idle speed
77 BR/B Approximately 2.3V
0 - 0.3V
[Engine is running]
● Warm-up condition
● Idle speed
NOTE:
The pulse cycle changes depending on rpm
46 L/R Ignition signal No. 7 at idle
60 GR/R Ignition signal No. 5 SEC986C
61 O/W Ignition signal No. 3
0.1 - 0.6V
62 Y/R Ignition signal No. 1
[Engine is running]
● Warm-up condition
● Engine speed: 2,500 rpm
SEC987C
Revision: October 2004 EC-120 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage) A
COLOR
NO.
[Engine is running]
Sensor ground
66 R ● Warm-up condition Approximately 0V EC
(Throttle position sensor)
● Idle speed
[Engine is running]
67 B Sensor ground ● Warm-up condition Approximately 0V C
● Idle speed
Sensor power supply
68 W/L [Ignition switch: ON] Approximately 5V D
(PSP sensor)
[Ignition switch: ON]
● Engine: Stopped
Less than 4.75V E
● Selector lever: D
● Accelerator pedal: Fully released
69 W Throttle position sensor 2
[Ignition switch: ON]
F
● Engine: Stopped
More than 0.36V
● Selector lever: D
● Accelerator pedal: Fully depressed
G
[Engine is running]
● Warm-up condition
70 B/W Refrigerant pressure sensor 1.0 - 4.0V
● Both A/C switch and blower switch: ON H
(Compressor: Operates.)
Approximately 0 - 4.8V
Engine coolant temperature
73 Y/B [Engine is running] Output voltage varies with
sensor I
engine coolant temperature.
[Engine is running]
● Warm-up condition
J
● Revving engine from idle to 3,000 rpm
Heated oxygen sensor 2 quickly after the following conditions are
74 L 0 - Approximately 1.0V
(bank 2) met.
– After keeping the engine speed between K
3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
[Engine is running] L
Sensor ground
78 B/W ● Warm-up condition Approximately 0V
(Heated oxygen sensor 2)
● Idle speed
M
0 - 0.3V
[Engine is running]
● Warm-up condition
● Idle speed
NOTE:
The pulse cycle changes depending on rpm
65 G/R Ignition signal No. 8 at idle
SEC986C
79 V/W Ignition signal No. 6
80 W/R Ignition signal No. 4
0.1 - 0.6V
81 W/G Ignition signal No. 2
[Engine is running]
● Warm-up condition
● Engine speed: 2,500 rpm
SEC987C
Revision: October 2004 EC-121 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
[Engine is running]
Sensor ground
82 B/R ● Warm-up condition Approximately 0V
(APP sensor 1)
● Idle speed
[Engine is running]
Sensor ground
83 G/W ● Warm-up condition Approximately 0V
(APP sensor 2)
● Idle speed
[Ignition switch: ON] Approximately 5V - Battery volt-
85 G/W Data link connector
● CONSULT-II or GST: Disconnected age (11 - 14V)
Approximately 1.1 - 2.3V
86 P CAN communication line [Ignition switch: ON] Output voltage varies with the
communication status
Sensor power supply
90 L [Ignition switch: ON] Approximately 5V
(APP sensor 1)
Sensor power supply
91 W/R [Ignition switch: ON] Approximately 5V
(APP sensor 2)
Approximately 2.6 - 3.2V
94 L CAN communication line [Ignition switch: ON] Output voltage varies with the
communication status.
[Ignition switch: ON]
● Engine: Stopped 0.25 - 0.50V
Accelerator pedal position ● Accelerator pedal: Fully released
98 G/R
sensor 2 [Ignition switch: ON]
● Engine: Stopped 2.0 - 2.5V
● Accelerator pedal: Fully depressed
[Ignition switch: ON]
Approximately 4V
● ASCD steering switch: OFF
[Ignition switch: ON]
Approximately 0V
● MAIN switch: Pressed
[Ignition switch: ON]
99 G/Y ASCD steering switch Approximately 1V
● CANCEL switch: Pressed
[Ignition switch: ON]
Approximately 3V
● RESUME/ACCELERATE switch: Pressed
[Ignition switch: ON]
Approximately 2V
● SET/COAST switch: Pressed
[Ignition switch: OFF]
Approximately 0V
● Brake pedal: Fully released
101 R/W Stop lamp switch
[Ignition switch: OFF] BATTERY VOLTAGE
● Brake pedal: Slightly depressed (11 - 14V)
[Ignition switch: ON]
Approximately 0V
● Selector lever: P or N
102 GR/R PNP switch
[Ignition switch: ON] BATTERY VOLTAGE
● Except the above gear position (11 - 14V)
BATTERY VOLTAGE
[Ignition switch: OFF]
104 O Throttle control motor relay (11 - 14V)
[Ignition switch: ON] 0 - 1.0V
Revision: October 2004 EC-122 2005 Titan
TROUBLE DIAGNOSIS
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage) A
COLOR
NO.
[Ignition switch: ON]
● Engine: Stopped 0.5 - 1.0V EC
Accelerator pedal position ● Accelerator pedal: Fully released
106 BR/W
sensor 1 [Ignition switch: ON]
● Engine: Stopped 4.2 - 4.8V C
● Accelerator pedal: Fully depressed
Approximately 0 - 4.8V
107 V/R Fuel tank temperature sensor [Engine is running] Output voltage varies with fuel D
tank temperature.
[Ignition switch: ON]
Approximately 0V E
● Brake pedal: Slightly depressed
108 BR/W ASCD brake switch
[Ignition switch: ON] BATTERY VOLTAGE
● Brake pedal: Fully released (11 - 14V)
F
[Ignition switch: OFF] 0V
109 L/W Ignition switch BATTERY VOLTAGE
[Ignition switch: ON]
(11 - 14V)
G
[Engine is running]
[Ignition switch: OFF]
0 - 1.5V
● For a few seconds after turning ignition
ECM relay switch OFF H
111 W/B
(Self shut-off)
[Ignition switch: OFF]
BATTERY VOLTAGE
● More than a few seconds after turning igni- (11 - 14V)
tion switch OFF I
[Ignition switch: ON]
● For 1 second after turning ignition switch
0 - 1.5V J
ON
113 GR Fuel pump relay [Engine is running]
[Ignition switch: ON]
BATTERY VOLTAGE K
● More than 1 second after turning ignition (11 - 14V)
switch ON
115 B [Engine is running]
116 B/W
ECM ground Body ground L
● Idle speed
EVAP canister vent control BATTERY VOLTAGE
117 L/Y [Ignition switch: ON]
valve (11 - 14V)
M
119 BR BATTERY VOLTAGE
Power supply for ECM [Ignition switch: ON]
120 BR (11 - 14V)
Power supply for ECM (Buck- BATTERY VOLTAGE
121 W [Ignition switch: OFF]
up) (11 - 14V)
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Revision: October 2004 EC-123 2005 Titan
