J1587 Fault Codes G04.

01
Table of Contents

System Overview
Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
Routed Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502
ECU Identification on Datalinks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503
J1587 Failure Mode Identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504
ICU3 Roll Call Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505
ICU4 J1587 Datalink Roll Call Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506
ICU4M J1587 Datalink Roll Call Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
Related Subjects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508
Troubleshooting
J1587 Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700
Displayed Roll Call Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 701
ICU3 J1587 Fault Messages After Power On Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 702
ICU4 J1587 Datalink Roll Call Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 703
ICU4M J1587 Datalink Roll Call Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 704

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500 — Terms and Abbreviations

CAN—Controller Area Network
CGW—Central Gateway
Communication Protocol—A set of rules governing communication between electronic devices.
Datalink—A collection of wires, connecting system components, through which data is transmitted.
Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW.
Diagnostic Connector—A 9-pin diagnostic connector used for troubleshooting the electrical system.
ECU—Electronic Control Unit, typically connected to a datalink.
MID—Message Identifier. Indicates numeric assignment for a device that communicates on J1587.
MSF—Modular Switch Field
Off-board tool—Typically refers to a PC-based application that communicates with the vehicle datalinks via a
connection to the diagnostic connector.
Parameter—A parameter is a specific value that is assigned to a feature or function of the vehicle, and allows
the customer to choose how that particular feature or function will work on the vehicle.
SA—Source Address; indicates numeric assignment for a device that communicates on J1939 or CAN.
SAE—Society of Automotive Engineers
SAM—Signal Detect and Actuation Module
SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related func-
tionality. See G02.04 — SAM Cab for more information.
SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related function-
ality. See G02.05 — SAM Chassis for more information.
SFU—Switch Field Unit; see MSF.

501 — General Information

This subject contains a master list of all known possible J1587 faults for the Cascadia. For engine faults
(MID128), refer to the engine manufacturer’s diagnostic tools and documentation.
Fault codes appearing on either the ICU or J1587 fault screens must be verified as faults from a J1587 ECU,
and not a "routed fault." A routed fault is a fault that the Central Gateway routed from another protocol to the ICU
or the J1587 fault screen.

502 — Routed Faults

The Central Gateway (CGW) routes and translates messages between the J1939, J1708, Cabin CAN, and Diag-
nostic CAN datalinks.
To verify whether a J1587 fault is routed, perform one of the following steps:
• Use Table 1 to confirm that the ECU MID is for an ECU that is physically connected to J1587.
• Connect to ServiceLink or DiagnosticLink. Note that in ServiceLink, routed faults appear in grey text. Se-
lect a different protocol until ECU faults appear in black text. Seeing a fault on the J1587 fault screen in

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black text verifies that the fault is from a J1587 ECU, and verifies that J1587 is the correct protocol to view
for troubleshooting that fault or ECU.
The CGW has the following wiring connections:
• Each datalink on the vehicle: J1708, J1939, Cabin CAN, and Diagnostic CAN.
• On the Diagnostic CAN, the CGW has a direct connection to the diagnostic connector.
• On the Cabin CAN, the CGW is directly connected to the starpoint connector.
The CGW has the following main functions:
• Routes and translates messages between datalinks.
• Interfaces between off-board tools and Cabin CAN ECUs.
• Provides faults for any missing Cabin CAN ECUs.
In some cases, the Cabin CAN ECUs need information from J1939 or J1708 ECUs. Information sent by the
J1939 or J1708 ECU is picked up by the CGW and passed to the appropriate Cabin CAN ECU. The reverse oc-
curs when a J1939 or J1708 ECU needs information from a CAN ECU.

Routing Active CAN Faults

If a CAN ECU generates an active fault, the CGW will route up to one active fault for that ECU on to J1939 or
J1708, for display on the instrument cluster (ICU) message center, which does not have a direct connection to
CAN. This is to alert the driver that the ECU has an active fault.
When a CAN ECU generates an active fault:
• J1939 displays up to one active fault for that CAN ECU under the J1939 source address for that CAN
ECU. SAM Cab, for example, is SA 33. Accurate SPN and FMI information for that fault is also displayed.
• J1708 displays up to one active fault for that CAN ECU under the MID for that CAN ECU. SAM Cab, for
example, is MID 249. Accurate SID/PID or FMI information is not displayed for that fault. It appears under
the generic SID of "254", and the FMI may or may not be accurate.

Routing Active J1939 Faults

If a J1939 ECU generates an active fault, the CGW will route up to one active fault for that ECU on J1708, for
display on the instrument cluster (ICU) message center. This alerts the driver that the ECU has an active fault,

Diagnostic CAN
Central Gateway
(500kbps) SAE J1939−13
SAE J1708
9−Pin connector
(9.6kbps)

SAM Cab
Cabin CAN SAE J1939
(125kbps) (250kbps)

07/02/2007 f040759

Fig. 1, Central Gateway, Diagnostic Connector, and Vehicle Datalinks

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 J1587 Fault Codes G04.01

especially if the ICU has a J1708 connection only. When a J1939 ECU generates an active fault, there may be
up to one active fault on J1708 for that CAN ECU under the MID for that CAN ECU. The HVAC front control unit,
for example, is MID 146. Accurate information for SID/PID or FMI is not displayed for that fault. It appears under
the generic SID of "254", and the FMI may or may not be accurate.
For more information regarding message routing behavior by the CGW, refer to G02.03 – Central Gateway.

503 — ECU Identification on Datalinks

The information in Table 1 identifies which ECU is reporting the fault, and which datalink protocol to loads to get
accurate fault information for troubleshooting that ECU.
NOTE: Items in parenthesis indicate a message that is routed through the CGW from an ECU that is
not physically connected to the J1587 datalink.

ECU Identification on Datalinks

ECU Description CAN ID J1939 SA J1587 MID Comments
SAM Cab 33 (33) (249) —
SAM Chassis 71 (71) (216) —
Modular Switch
49 (49) (164) —
Field (MSF)
Central Gateway
37 (37) (206) —
(CGW)
Engine Control 1 — 0 128 —
Engine Control 2 — 1 175 —
Transmission — 3 130 —
ABS — 11 136 —
Retarder, Engine — 12 173 —
Instrument Cluster — 23* 140 —
Navigation — 28 162 —
Engine Display — 40 171 —
CGW reporting MID 146;
HVAC, Front — 25 (146) there is no physical J1708
connection.
CGW reporting MID 200;
HVAC, Rear — 58 (200) there is no physical J1708
connection.
CGW reporting MID 221;
Radio — 76 (221) there is no physical J1708
connection.
CGW reporting MID 219;
Collision Warning — 42 (219) there is no physical J1708
connection.
Qualcomm — 75 181 —
Lane Guidance — 232 — —

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ECU Identification on Datalinks

ECU Description CAN ID J1939 SA J1587 MID Comments
Front Airbag Sensor — — 232 —
Roll Sensor Module — — 254 —
* ICU4M Only.
Table 1, ECU Identification on Datalinks

The following examples demonstrate how to identify and diagnose faults using Table 1.
• J1708 Fault: MID 146, SID 254, FMI 03
– MID 146 is the Front HVAC.
– The Front HVAC is diagnosed using J1939.
– Load the J1939 fault screen in ServiceLink or DiagnosticLink for diagnostic information.
• J1939 Fault: SA 49, SPN 168, FMI 03
– SA 49 is the Modular Switch Field (MSF).
– The MSF is diagnosed using the CAN protocol.
– Load the CAN fault screen in ServiceLink or DiagnosticLink for diagnostic information.
• J1708 Fault: MID 216, SID 254, FMI 14
– MID 216 is the SAM Chassis.
– The SAM Chassis is diagnosed using the CAN protocol.
– Load the CAN fault screen in ServiceLink or DiagnosticLink for diagnostic information.
• J1708 Fault: MID 136, SID 123, FMI 02
– MID 136 is the ABS module.
– The ABS is diagnosed using the J1708 protocol.
– Load the J1708 fault screen in ServiceLink or DiagnosticLink for diagnostic information.

504 — J1587 Failure Mode Identifiers

Failure Mode Identifiers (FMIs)
FMI Description
00 Data valid but above normal operational range (engine overheating).
01 Data valid but below normal operational range (engine oil pressure too low).
02 Data erratic, intermittent, or incorrect.
03 Voltage above normal, or shorted high.
04 Voltage below normal, or shorted low.
05 Current below normal, or open circuit.
06 Current above normal, or grounded circuit.

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Failure Mode Identifiers (FMIs)

FMI Description
07 Mechanical system not responding properly.
08 Abnormal frequency, pulse width, or period.
09 Abnormal update rate.
10 Abnormal rate of change.
11 Failure mode not identifiable.
12 Bad intelligent device or component.
13 Out of Calibration.
14 Special Instructions.
15 Reserved for future assignment by SAE.
Table 2, Failure Mode Identifiers (FMIs)

505 — ICU3 Roll Call Faults

On vehicles equipped with the ICU3 instrument cluster, messages from both the engine and ABS on the J1587
datalink are transmitted when the vehicle powers up. If the ICU3 does not receive messages from one or both, it
displays "no EnG" and/or "no ABS" faults. If there is no communication between the ICU3 and the J1587
datalink, the ICU displays the message "no DATA". Engine and ABS roll call messages are accompanied by a
roll call fault that is only displayed on the ICU driver display screen. Refer to Table 3 for a list of faults.
NOTE: Roll call faults "ECU 128 SID 254 FAIL 07" and "AbS 136 SID 254 FAIL 07" originate from the
ICU, and are only displayed on the ICU driver display screen. The faults will not show up in any ser-
vice tool that reads J1587 datalink faults.
If the ICU3 detects an active fault from one of the active faults on the J1587 datalink, it displays a message that
contains both an abbreviation of the ECU with the fault, and its MID. Refer to Table 4 for a list of messages.
For more information, refer to C01.01 — ICU3.

506 — ICU4 J1587 Datalink Roll Call Faults

The ICU4 is programmed to detect the engine ECM on the J1587 datalink. Any other ECUs that the ICU detects
on the J1587 datalink will be "learned." The ICU will attempt to detect these "learned" ECUs, in addition to the
engine ECM on roll call at every subsequent power up. The ICU4M learns and detects up to four components on
the J1939 datalink, which includes the front HVAC controller, the rear HVAC controller, the MSF, and the Colli-
sion Warning System (VORAD).
If the ICU does not detect an expected ECU on roll call, it will report it on the display. These faults are not dis-
played in the service tool. The ICU4 reports roll call faults with three screens on the display. The first screen
shows one of the messages in the "Message" column of Table 5. This indicates the J1587 MID of the ECU that
is not reporting on roll call. The following two screens report the SID and FMI. Roll call faults have a SID 254
and FMI 07.
NOTE: The ABS and engine ECM do not report the actual MID on the screen, but instead report "no
Abs" or "no ENG" to indicate the MIDs of those ECUs.

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507 — ICU4M J1587 Datalink Roll Call Faults

The entire roll call fault on the ICU4M is displayed on a single screen. All J1587 datalink roll call faults have a
SID 254 and FMI 07. Refer to Table 6 for more information.
For more information on ICU4/ICU4M roll call faults, refer to C01.02 — ICU4/ICU4M Instrument Cluster.

508 — Related Subjects

• G02.02 — Datalink Communication Structure
• G02.04 — SAM Cab
• G02.05 — SAM Chassis
• G02.06 — Modular Switch Field
• G03.01 — Datalink, J1587/J1708
• G03.02 — Datalink, J1939
• G03.03 — Datalink, Cabin CAN
• G03.04 — Datalink, Diagnostic CAN
• C01.01 — ICU3
• C01.02 — ICU4/ICU4M

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700 — J1587 Fault Codes

J1587 Fault Codes
MID SID/PID FMI Fault Description Reference Subjects
136 001–006 01 Incorrect air gap.
136 001–006 02 Incorrect tire size.
136 001–006 03 Sensor shorted to power.
136 001–006 04 Short to Ground.
136 001–006 05 Open Circuit.
136 001–006 06 Short Circuit.
136 001–006 07 Damaged Tone Ring.
136 001–006 08 Excessive Wheel Slip.
136 001–006 09 Wire Mismatch.
136 001–006 10 Speed Signal Drop Out.
136 001–006 11 Abnormal Speed.
136 001–006 12 Frequency Too High.
136 007–010 03 Short to Power.
136 007–010 05 Open Circuit.
136 007–010 06 Short to Ground.
136 13 03 Retarder Relay Circuit – short to power.
136 13 05 Retarder Relay Circuit – open circuit.
136 13 06 Retarder Relay Circuit – short to ground.
H01.01 – ABS and Roll Stability Control
136 14 04 Low voltage or open circuit. System
Ground circuit open or high resistance;
verify that the batteries are not
136 14 05
disconnected or shut off, otherwise results
may be misleading.
136 14 06 Internal relay does not open.
136 15 03 ATC Valve ground circuit shorted to power.
136 15 05 ATC Valve High Impedance.
ATC Valve ground circuit shorted to
136 15 06
ground.
136 18 03 Short to Power.
136 18 05 Open Circuit.
136 18 06 Short to Ground.
J1939 speed plausibility error; This fault
indicates a discrepancy between vehicle
136 231 02
speed reported on J1939 and ABS
sensed vehicle speed.
136 231 05 J1939 – open/short.
J1939 – open/short. Code 136s231 05
136 231 06
may be active as well.
J1939 time out. Fault occurs if engine
136 231 07
retarder sends message incorrectly.

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J1587 Fault Codes

MID SID/PID FMI Fault Description Reference Subjects
J1939 time out. Fault occurs if engine
136 231 08
retarder sends message incorrectly.
J1939 time out. Fault occurs if engine or
136 231 09
transmission sends message incorrectly.
J1939 time out. Fault occurs if exhaust
136 231 10
retarder sends a message incorrectly.
136 231 12 J1939 internal error.
Overvoltage –Voltage to ECU was too
136 251 03
high for more than 5 seconds.
136 254 05 ABS/ATC ECU, no loads. C07.08 — SRS System
136 254 08 Excessive Wheel Slip.
136 254 09 Modulator valve actuated too long.
136 254 07 ABS Missing.
136 254 02 EEPROM, Wheel parameter incorrect.
136 254 12 EEPROM, Checksum/internal error.
136 254 13 Accelerator out of range.
136 254 14 ECU mounting/accelerometer plausibility.
ICU3 voltage is too low (less than 10.5
140 p168 01
volts).
ICU3 program memory failure; odometer
read/write to EEPROM fails.
When this failure occurs, the ICU is
140 s240 12 unable to display the fault on the LCD, but C01.01 — ICU3
the fault displays in the service tool. When
this fault is active, the LCD display shows
a series of seven hyphens "- - - - - - -".
ICU3 Controller Failure; ICU self-test
140 s254 12
"detectschecksum errors".

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J1587 Fault Codes

MID SID/PID FMI Fault Description Reference Subjects
Forward rear-axle temperature sensor –
140 p077 05
open.
Forward rear-axle temperature sensor –
140 p077 06
shorted.
140 p078 05 Rear rear-axle temperature sensor – open.
Rear rear-axle temperature sensor –
140 p078 06
shorted.
140 p96 05 Fuel level sensor – open.
140 p96 06 Fuel level sensor – shorted. C01.02 — ICU4/ICU4M
Lightbar voltage too low (less than 10.5
140 p168 01
volts).
Transmission oil temperature sensor –
140 p177 05
open.
Transmission oil temperature sensor –
140 p177 06
shorted.
140 s240 12 LBCU program memory failure.
140 s254 12 LBCU controller failure.
232 s001 03 Airbag igniter circuit – shorted to power.
232 s001 04 Airbag igniter circuit – shorted to ground.
232 s001 05 Airbag igniter circuit – open circuit.
232 s001 06 Airbag igniter circuit – shorted.
232 s240 14 Frontal collision detected.
Frontal Crash Sensor (Safety Restraint
232 s254 07 System 1); not detected by the ICU on
Roll Call.
254 s001 05 Driver seat igniter loop – open.
254 s001 06 Driver seat igniter loop – shorted.
254 s002 05 Driver side airbag igniter loop – open.
C07.08 — SRS System
254 s002 06 Driver side airbag igniter loop – shorted.
254 s003 05 Passenger seat igniter loop – open.
254 s003 06 Passenger seat igniter loop – shorted.
254 s004 05 Passenger side airbag igniter loop – open.
Passenger side airbag igniter loop –
254 s004 06
shorted.
254 s240 14 Rollover or frontal crash detected.
Roll Sensor Module (Safety Restraint
254 s254 07 System 2) – Not Detected by ICU on Roll
Call.
Rollover module – bad device or
254 s254 12
component.
Table 3, J1587 Fault Codes

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NOTE: For engine-related faults, refer to the engine manufacturer’s diagnostic software.

701 — Displayed Roll Call Messages

Displayed Roll Call Messages
Displayed
Description
Message
The ICU is unable to communicate with the
engine control module on the J1587
datalink. This is followed by a roll call fault
no EnG on the driver display. The roll call fault may
be displayed as one of the following: no
EnG SID 254 FAIL 07 or ECU 128 SID
254 FAIL 07.
The ICU is unable to communicate with the
ABS on the J1587 datalink. This is
followed by a roll call fault on the driver
no ABS
display. The roll call fault may be displayed
as one of the following: no ABS SID 254
FAIL 07 or AbS 136 SID 254 FAIL 07.
The ICU is not communicating with the
no DATA
J1587 datalink.
Table 4, Displayed Roll Call Messages

NOTE: For engine-related faults, refer to the engine manufacturer’s diagnostic software.

702 — ICU3 J1587 Fault Messages After Power On Sweep

NOTE: For engine-related faults, refer to the engine manufacturer’s diagnostic software.

ICU3 J1587 Fault Messages After Power On Sweep

Message System With Active Fault
AbS 136 Antilock Brake System
APU 190 Air Conditioning Protection Unit
Cab 249 SAM Cab
CdU 219 Collision Detection Unit (VORAD)
CEL 231 Cellular Phone
CGU 206 Central Gateway
CHS 216 SAM Chassis
Engine Control Unit (engine control
ECU 128
module)
ICU 140 Instrument Cluster Unit (ICU4/4M)
rAd 221 Radio
SAT 181 Satellite Communications (Qualcomm)
Sbu 232 Seat Belt Unit (SPACE/Airbag system)

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ICU3 J1587 Fault Messages After Power On Sweep

Message System With Active Fault
Step Deployment Unit, Driver Side
SdU 236
(not used)
Step Deployment Unit, Passenger
SdU 237
Side (not used)
SFU 164 Modular Switch Field
Generic (system not defined in this
SYS ###
table)
tCU 130 Transmission Control Unit
tSU 223 Transmission Shift Unit
Table 5, ICU3 J1587 Fault Messages After Power
On Sweep

703 — ICU4 J1587 Datalink Roll Call Faults

ICU4 J1587 Datalink Roll Call Faults
System Not Responding
Message SID FMI
to Roll Call
No ECUs on the J1587
No Data — —
datalink are responding
Antilock Brake System
No ABS SID 254 FAIL 07
(ABS)
No ENG SID 254 FAIL 07 Engine Control Module 1
ECU 173 SID 254 FAIL 07 Retarder, Engine
ECU 175 SID 254 FAIL 07 Engine Control Module 2
Air Conditioning Protection
APU 190 SID 254 FAIL 07
Unit
CAB 249 SID 254 FAIL 07 SAM Cab
Collision Detection Unit
CDU 219 SID 254 FAIL 07
(VORAD)
CEL 231 SID 254 FAIL 07 Cellular Phone
CGU 206 SID 254 FAIL 07 Central Gateway
RAD 221 SID 254 FAIL 07 Radio
SAT 181 SID 254 FAIL 07 Satellite Communications
CHS 216 SID 254 FAIL 07 SAM Chassis
Seat Belt Unit (SPACE/
SBU 232 SID 254 FAIL 07
Airbag system)
Step Deployment Unit,
SDU 236 SID 254 FAIL 07
Driver Side (not used)
Step Deployment Unit,
SDU 237 SID 254 FAIL 07
Passenger Side (not used)
SFU 164 SID 254 FAIL 07 Modular Switch Field

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ICU4 J1587 Datalink Roll Call Faults

System Not Responding
Message SID FMI
to Roll Call
Generic (system not defined
SYS ### SID 254 FAIL 07
in this table)
TCU 130 SID 254 FAIL 07 Transmission Control Unit
TSU 223 SID 254 FAIL 07 Transmission Shift Unit
Table 6, ICU4 J1587 Datalink Roll Call Faults

704 — ICU4M J1587 Datalink Roll Call Faults

ICU4M J1587 Datalink Roll Call Faults
Fault System not Responding to Roll Call
128s254 07 Engine Control Module 1
130s254 07 Transmission Control Unit
136s254 07 Antilock Brake System (ABS)
162s254 07 Navigation
171s254 07 Engine Display
173s254 07 Retarder, Engine
175s254 07 Engine Control Module 2
164s254 07 Modular Switch Field (MSF)
181s254 07 Satellite Communications (Qualcomm)
190s254 07 Air Conditioning Protection Unit
206s254 07 Central Gateway
216s254 07 SAM Chassis
219s254 07 Collision Detection Unit (VORAD)
221s254 07 Radio
223s254 07 Transmission Shift Unit
231s254 07 Cellular Phone
232s254 07 Seat Belt Unit (SPACE/Airbag system)
Step Deployment Unit, Driver Side
236s254 07
(not used)
Step Deployment Unit, Passenger
237s254 07
Side (not used)
249s254 07 SAM Cab
Table 7, ICU4M J1587 Datalink Roll Call Faults

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