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ELECTRONIC CONTROL MODULES 8E - 1 |
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ELECTRONIC CONTROL MODULES
TABLE OF CONTENTS
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ELECTRONIC CONTROL MODULES - |
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ELECTRONIC CONTROL MODULES - SERVICE |
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ELECTRICAL DIAGNOSTICS. . . . . . . . . . . . . . |
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INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . |
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ELECTRONIC CONTROL MODULES - ELECTRICAL
DIAGNOSTICS
TABLE OF CONTENTS
page
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
B210D-BATTERY VOLTAGE LOW . . . . . . . . . . . . . . 4 B210E-BATTERY VOLTAGE HIGH . . . . . . . . . . . . . 5 B222C-VEHICLE CONFIGURATION NOT
PROGRAMMED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 B2206-CURRENT VIN MISSING/MISMATCH . . . . 7 B2215-FRONT CONTROL MODULE
INTERNAL (TOTALLY INTEGRATED
POWER MODULE). . . . . . . . . . . . . . . . . . . . . . . . . . . 8 C2100±BATTERY VOLTAGE LOW (FDCM) . . . . . . 9 C2101±BATTERY VOLTAGE HIGH (FDCM) . . . . 11 C2201-FDCM ECU INTERNAL (FDCM) . . . . . . . . 13 U0001-CAN C BUS CIRCUIT . . . . . . . . . . . . . . . . . 14 U0021-CAN B BUS (+) CIRCUIT OPEN . . . . . . . . 19 U0022-CAN B BUS (+) CIRCUIT LOW . . . . . . . . . 22 U0023-CAN B BUS (+) CIRCUIT HIGH . . . . . . . . 25 U0024-CAN B BUS (-) CIRCUIT OPEN . . . . . . . . 28 U0025-CAN B BUS (-) CIRCUIT LOW . . . . . . . . . 31 U0026-CAN B BUS (-) CIRCUIT HIGH . . . . . . . . . 35 U0027-CAN B BUS (-) SHORTED TO BUS
(+). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 U0100-LOST COMMUNICATION WITH
ECM/PCM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 U0101-LOST COMMUNICATION WITH TCM . . . 44 U0114-LOST COMMUNICATION WITH FINAL
DRIVE CONTROL MODULE. . . . . . . . . . . . . . . . . . 47 U0121-LOST COMMUNICATION WITH
ANTI-LOCK BRAKE MODULE. . . . . . . . . . . . . . . . 50 U0141±LOST COMMUNICATION WITH
FRONT CONTROL MODULE (TOTALLY INTEGRATED POWER MODULE). . . . . . . . . . . . . 53
page
U0151±LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER
(ORC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 U0155-LOST COMMUNICATION WITH
CLUSTER/CCN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 U0156±LOST COMMUNICATION WITH EOM . . 62 U0164-LOST COMMUNICATION WITH HVAC
CONTROL MODULE. . . . . . . . . . . . . . . . . . . . . . . . . 65 U0168-LOST COMMUNICATION WITH
VEHICLE SECURITY CONTROL MODULE (SKREEM/WCM). . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
U0169-LOST COMMUNICATION WITH
SUNROOF CONTROL MODULE. . . . . . . . . . . . . . 71 U0184-LOST COMMUNICATION WITH
RADIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 U0186-LOST COMMUNICATION WITH
AUDIO AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . 77 U0195-LOST COMMUNICATION WITH
SDARS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 U0196-LOST COMMUNICATION WITH
VEHICLE ENTERTAINMENT CONTROL MODULE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
U0197-LOST COMMUNICATION WITH
HANDS FREE PHONE MODULE. . . . . . . . . . . . . . 86 U1108-ADDITIONAL CAN B ECU DETECTED . . 89 *STORED LOST COMMUNICATION DTCS . . . . 91 *CAN C DIAGNOSTIC (+) AND/OR CAN C
DIAGNOSTIC (-) CIRCUITS HIGH. . . . . . . . . . . . . 94 *CAN C DIAGNOSTIC (+) SHORTED TO
CAN C DIAGNOSTIC (-). . . . . . . . . . . . . . . . . . . . . 96 *CAN C DIAGNOSTIC (+) CIRCUIT LOW . . . . . . 98 *CAN C DIAGNOSTIC (-) CIRCUIT LOW . . . . . 100 *CAN C DIAGNOSTIC (+) CIRCUIT OPEN . . . . 102 *CAN C DIAGNOSTIC (-) CIRCUIT OPEN . . . . 104
8E - 2 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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*BOTH CAN C DIAGNOSTIC (+) AND CAN C DIAGNOSTIC (-) CIRCUITS OPEN. . . . . . . . . . . 106
*NO RESPONSE FROM ABS (ANTILOCK
BRAKE MODULE). . . . . . . . . . . . . . . . . . . . . . . . . . 109 *NO RESPONSE FROM AMP (AMPLIFIER) . . . 113 *NO RESPONSE FROM CCN (CLUSTER) . . . . 116 *NO RESPONSE FROM ECM (ENGINE
CONTROL MODULE) - DIESEL. . . . . . . . . . . . . . 120 *NO RESPONSE FROM EOM (ELECTRONIC
OVERHEAD MODULE). . . . . . . . . . . . . . . . . . . . . 123 *NO RESPONSE FROM FDCM (FINAL
DRIVE CONTROL MODULE) (POWER
WAGON ONLY). . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 *NO RESPONSE FROM GATEWAY MODULE
- (SRT10 ONLY). . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 *NO RESPONSE FROM HFM (HANDS FREE
MODULE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 *NO RESPONSE FROM HVAC (A/C HEATER
CONTROL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 *NO RESPONSE FROM ORC (OCCUPANT
RESTRAINT CONTROLLER). . . . . . . . . . . . . . . . 141 *NO RESPONSE FROM PCM
(POWERTRAIN CONTROL MODULE)
(NGC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
*NO RESPONSE FROM PCM (PCI BUS) -
(SRT10 ONLY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 *NO RESPONSE FROM PCM (SCI ONLY) -
(SRT10 ONLY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 *NO RESPONSE FROM RADIO . . . . . . . . . . . . . 156 *NO RESPONSE FROM SDAR (SATELLITE
RECEIVER). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 *NO RESPONSE FROM SUNR (SUNROOF
MOTOR/MODULE). . . . . . . . . . . . . . . . . . . . . . . . . 162 *NO RESPONSE FROM TCM
(POWERTRAIN CONTROL MODULE) -
NGC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 *NO RESPONSE FROM TIPM (TOTALLY
INTEGRATED POWER MODULE). . . . . . . . . . . . 167 *NO RESPONSE FROM VES (MONITOR/
DVD MEDIA SYSTEM). . . . . . . . . . . . . . . . . . . . . . 170 *NO RESPONSE FROM WCM (SENTRY KEY
REMOTE ENTRY MODULE). . . . . . . . . . . . . . . . . 173 STANDARD PROCEDURE
BODY VERIFICATION TEST - VER 1 . . . . . . . . 177
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 3 |
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
8E - 4 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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B210D-BATTERY VOLTAGE LOW
For a complete wiring diagram Refer to Section 8W.
²When Monitored:
With the ignition on.
²Set Condition:
Battery voltage less than 9 volts for more than 15 seconds.
Possible Causes
RESISTANCE IN THE (A1) BATTERY POSITIVE CIRCUIT
RESISTANCE IN THE GENERATOR CASE GROUND
GENERATOR OPERATION
GENERATOR FIELD CONTROL CIRCUIT OPEN
GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND
GROUND CIRCUIT OPEN
PCM/ECM
Diagnostic Test
1. CHECK FOR ANY POWERTRAIN/ENGINE CONTROL MODULES DTCS
NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing.
NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output.
NOTE: Make sure the generator drive belt is in good operating condition.
NOTE: Inspect the fuses in the TIPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage.
Turn the ignition on.
With the scan tool, read active PCM/ECM DTC's.
Does the scan tool display any active DTC's?
Yes >> (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) for the diagnostic test procedure.
No >> Check the above conditions that can cause a low voltage condition. Repair as necessary.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 5 |
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B210E-BATTERY VOLTAGE HIGH
For a complete wiring diagram Refer to Section 8W.
²When Monitored:
With the ignition on.
²Set Condition:
Battery voltage greater than 16 volts for more than 15 seconds.
Possible Causes
GENERATOR FIELD CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
GENERATOR
PCM/ECM
Diagnostic Test
1. CHECK FOR ANY POWERTRAIN/ENGINE CONTROL MODULES DTCS
NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing.
NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output.
NOTE: Make sure the generator drive belt is in good operating condition.
NOTE: Inspect the fuses in the TIPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage.
Turn the ignition on.
With the scan tool, read active PCM/ECM DTC's.
Does the scan tool display any active DTC's?
Yes >> (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) for the diagnostic test procedure.
No >> Check the above conditions that can cause a high voltage condition. Repair as necessary.
8E - 6 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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B222C-VEHICLE CONFIGURATION NOT PROGRAMMED
For a complete wiring diagram Refer to Section 8W.
²When Monitored:
With the ignition on.
²Set Condition:
The Totally Integrated Power Module is not configured correctly to the vehicle.
Possible Causes
TOTALLY INTEGRATED POWER MODULE NOT CONFIGURED CORRECTLY
TOTALLY INTEGRATED POWER MODULE
Diagnostic Test
1. CHECK FOR ACTIVE DTC
With the scan tool, read the active DTC's.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?
Yes >> Go To 2
No >> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. CONFIGURE THE TIPM TO THE VEHICLE
With the scan tool enter program network configuration and program the TIPM to the vehicle configuration. With the scan tool, erase TIPM DTC's.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?
Yes >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Totally Integrated Power Module in accordance with the service information.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Repair is complete.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 7 |
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B2206-CURRENT VIN MISSING/MISMATCH
For a complete wiring diagram Refer to Section 8W.
²When Monitored:
With the ignition on.
²Set Condition:
The Totally Integrated Power Module (TIPM) will receive and monitor the VIN message from the PCM and record the VIN if different from the last VIN.
Possible Causes
INCORRECT VIN PROGRAMMED IN PCM
TOTALLY INTEGRATED POWER MODULE
Diagnostic Test
1. CHECK FOR ACTIVE DTC
With the scan tool, read the active DTC's.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?
Yes >> Go To 2
No >> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. CHECK VIN IN PCM
With the scan tool compare the VIN that is programmed into the PCM to the VIN on the vehicle.
Does the VIN programmed into the PCM match the vehicles VIN?
Yes >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Totally Integrated Power Module in accordance with the service information.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Program the correct VIN in the PCM and retest.
8E - 8 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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B2215-FRONT CONTROL MODULE INTERNAL (TOTALLY INTEGRATED POWER MODULE)
For a complete wiring diagram Refer to Section 8W.
²When Monitored:
Continuously.
²Set Condition:
The Totally Integrated Power Module detects an internal fault.
Possible Causes
TOTALLY INTEGRATED POWER MODULE (TIPM)
Diagnostic Test
1. REPLACE THE TOTALLY INTEGRATED POWER MODULE IF DTC IS ACTIVE
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?
Yes
No
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 9 |
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C2100±BATTERY VOLTAGE LOW (FDCM)
For a complete wiring diagram Refer to Section 8W
²When Monitored:
Continuously.
²Set Condition:
The Final Drive Control Module detects that system voltage is below 9.0 volts for 60 seconds.
Possible Causes
INTERMITTENT BATTERY VOLTAGE LOW
CHARGING SYSTEM DTCS PRESENT
FINAL DRIVE CONTROL MODULE POWER CIRCUITS OPEN OR HIGH RESISTANCE
FINAL DRIVE CONTROL MODULE
Diagnostic Test
1. CHARGING SYSTEM DTCS PRESENT
Ignition on.
With the scan tool, select View DTCs in the Powertrain Control Module.
Are there any Charging System or related voltage DTCs present?
Yes >> Refer to the symptom list and perform any Charging System DTC diagnostic procedures before continuing with this test.
No >> Go to 2
2. DTC IS ACTIVE
With the scan tool, select View DTCs in the Final Drive Control Module.
Is the status Active for this DTC?
Yes >> Go to 3
No >> Go to 5
3. (A34) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
Turn the ignition off.
Disconnect the Final Drive Control Module harness connector.
Turn the ignition on.
With a 12±volt test light connected to ground, check the (A34) Fused
B+ circuit in the Final Drive Control Module harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Yes >> Go to 4
No >> Repair the (A34) Fused B+ circuit for an open circuit or high resistance.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
8E - 10 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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4. FINAL DRIVE CONTROL MODULE
View repair.
Repair
Replace the Final Drive Control Module in accordance with the Service information.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
5. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Yes >> Repair as necessary.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
No >> Test complete.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 11 |
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C2101±BATTERY VOLTAGE HIGH (FDCM)
For a complete wiring diagram Refer to Section 8W
²When Monitored:
Continuously.
²Set Condition:
The Final Drive Control Module detects that system voltage is above 16.0 volts for 10 seconds with engine RPM greater than 350.
Possible Causes
INTERMITTENT BATTERY VOLTAGE HIGH
CHARGING SYSTEM DTCS PRESENT
FINAL DRIVE CONTROL MODULE GROUND CIRCUITS OPEN OR HIGH RESISTANCE
FINAL DRIVE CONTROL MODULE
Diagnostic Test
1. CHARGING SYSTEM DTCS PRESENT
Ignition on.
With the scan tool, select View DTCs in the Powertrain Control Module.
Are there any Charging System or related voltage DTCs present?
Yes >> Refer to the symptom list and perform any Charging System DTC diagnostic procedures before continuing with this test.
No >> Go to 2
2. DTC IS ACTIVE
With the scan tool, select View DTCs in the Final Drive Control Module.
Is the status Active for this DTC?
Yes >> Go to 3
No >> Go to 5
8E - 12 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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3. FINAL DRIVE CONTROL MODULE GROUND CIRCUITS OPEN OR HIGH RESISTANCE
Turn the ignition off.
Disconnect the Final Drive Control Module harness connector. Turn the ignition on.
With a 12±volt test light connected to B+, check the Ground circuits in the Final Drive Control Module harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly for each of the Ground circuits?
Yes >> Go to 4
No >> Repair the Ground circuit(s) for an open circuit or high resistance.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
4. FINAL DRIVE CONTROL MODULE
View repair.
Repair
Replace the Final Drive Control Module in accordance with the Service information.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
5. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Yes >> Repair as necessary.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
No >> Test complete.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 13 |
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C2201-FDCM ECU INTERNAL (FDCM)
For a complete wiring diagram Refer to Section 8W
²When Monitored:
With the ignition on.
²Set Condition:
The Final Drive Control Module has detected a failure internal to the controller.
Possible Causes
FINAL DRIVE CONTROL MODULE
1. FINAL DRIVE CONTROL MODULE
The Final Drive Control Module has detected an internal failure.
View repair
Repair
Replace the Final Drive Control Module in accordance with the Service Information.
Perform the FDCM VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE - STANDARD PROCEDURE)
8E - 14 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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U0001-CAN C BUS CIRCUIT
For a complete wiring diagram Refer to Section 8W.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 15 |
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²When Monitored:
With the ignition on.
²Set Condition:
The TIPM detects a short in either CAN C Bus circuit.
Possible Causes
(D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND
(D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND
(D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE
(D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE
(D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT ANTILOCK BRAKE MODULE
POWERTRAIN CONTROL MODULE
ENGINE CONTROL MODULE (DIESEL ONLY)
GATEWAY MODULE (SRT10 ONLY)
FINAL DRIVE CONTROL MODULE
TOTALLY INTEGRATED POWER MODULE
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001±CAN C BUS CIRCUIT as active?
Yes >> Go To 2
No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. ANTILOCK BRAKE MODULE Ð INTERNAL SHORT
Turn the ignition off.
Disconnect the Antilock Brake Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001±CAN C BUS CIRCUIT as active?
Yes >> Go To 3
No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Antilock Brake Module in accordance with the service information.
Perform the ABS VERIFICATION TEST Ð VER 1.
8E - 16 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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3. POWERTRAIN CONTROL MODULE Ð INTERNAL SHORT
Turn the ignition off.
Disconnect the Powertrain Control Module C1 harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001±CAN C BUS CIRCUIT as active?
Yes >> Go To 4
No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Powertrain Control Module in accordance with the service information.
Perform the POWERTRAIN VERIFICATION TEST
4. GATEWAY MODULE (SRT10 ONLY) Ð INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Gateway Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001±CAN C BUS CIRCUIT as active?
Yes
No
5. ENGINE CONTROL MODULE (DIESEL ONLY) Ð INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Engine Control Module C1 harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001±CAN C BUS CIRCUIT as active?
Yes
No
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 17 |
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6. FINAL DRIVE CONTROL MODULE (POWER WAGON ONLY) Ð INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Final Drive Control Module harness connectors.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001±CAN C BUS CIRCUIT as active?
Yes >>
No
7.
Turn the ignition off.
Disconnect the Totally Integrated Power Module C6 harness connector. Turn the ignition on.
Measure the voltage between the (D65) CAN C Bus (+) circuit and ground.
Is there any voltage present?
Yes >> Repair the (D65) CAN C Bus (+) circuit for a short to voltage.
Perform the BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No >> Go To 8
8. (D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE
Measure the voltage between the (D64) CAN C Bus (-) circuit and ground.
Is there any voltage present?
Yes >> Repair the (D64) CAN C Bus (-) circuit for a short to voltage.
Perform the BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Go To 9
8E - 18 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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9. (D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (D65) CAN C Bus (+) circuit.
Is any resistance present?
Yes >> Repair the (D65) CAN C Bus (+) circuit for a short to ground.
Perform the BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Go To 10
10. (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (D64) CAN C Bus (-) circuit.
Is any resistance present?
Yes >> Repair the (D64) CAN C Bus (-) circuit for a short to ground.
Perform the BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Go To 11
11. (D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT
Measure the resistance between the (D65) CAN C Bus (+) circuit and the (D64) CAN C Bus (-) circuit.
Is any resistance present?
Yes >> Repair the (D65) CAN C Bus (+) circuit for a short to the (D64) CAN C Bus (-) circuit.
Perform the BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Totally Integrated Power Module in accordance with the service information.
Perform the BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 19 |
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U0021-CAN B BUS (+) CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
8E - 20 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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²When Monitored:
With the ignition on and battery voltage between 10 and 16 volts.
²Set Condition:
The TIPM detects the (D55) CAN B Bus (+) circuit is open.
Possible Causes
CAN B BUS TERMINAL PUSH OUT SPREAD CAN B BUS TERMINAL (D55) CAN B BUS (+) CIRCUIT OPEN
INTERNAL OPEN IN A CAN B BUS MODULE
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display this DTC as active?
Yes >> Go To 2
No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. ATTEMPT TO ISOLATE THE OPEN CONDITION
Turn the ignition on.
Verify that all CAN B Bus modules are communicating with the scan tool.
NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
NOTE: If any module is not communicating, perform the appropriate no response test procedure before proceeding.
Turn the ignition off.
Gain access to the Totally Integrated Power Module C6 harness connector, but do not disconnect.
Using a fused jumper wire, connect one end to ground and with the other end backprobe the (D54) CAN B Bus (-) circuit at the TIPM C6 harness connector.
Turn the ignition on.
With the scan tool monitor the network status screen and document all modules that display a red X.
Are there any red X's displayed next to the modules?
Yes >> Go To 3
No >> Check backprobe connection to ground, make sure it is proper. The CAN B Bus open DTC may no longer be active, it may be stored. Check all module connections.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 21 |
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3. ATTEMPT TO ISOLATE THE OPEN CONDITION Ð MULTIPLE RED X'S
With the scan tool continue monitoring the network status screen.
Are there multiple red X's displayed next to the modules?
Yes >> The most likely cause of this condition is an open CAN B Bus (+) circuit between a common CAN B Bus splice and the modules that display the red X next to them. Using the wiring diagrams will help you determine where open condition exists.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Go To 4
4. (D55) CAN B BUS (+) CIRCUIT OPEN Ð SINGLE RED X
Turn the ignition off.
Disconnect the module that has the red X displayed next to it.
Turn the ignition on.
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
Is there any voltage present?
Yes >> Inspect the connector and terminal for damage, inspect for spread terminals, or push out terminals. If ok, replace the module that displayed the red X next to it in accordance with the service information. Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Repair the (D55) CAN B Bus (+) circuit for an open between the next common splice and the module that has the red X displayed next to it. Using the wiring diagrams will help you determine where open condition exists.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
8E - 22 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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U0022-CAN B BUS (+) CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 23 |
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²When Monitored:
Continuously.
²Set Condition:
The TIPM detects the (D55) CAN B Bus (+) circuit is shorted to ground.
Possible Causes
(D55) CAN B BUS (+) CIRCUIT SHORTED TO GROUND
ANY CAN B BUS MODULE
TOTALLY INTEGRATED POWER MODULE
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display this DTC as active?
Yes >> Go To 2
No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Totally Integrated Power Module C6 harness connector. Measure the resistance between ground and the (D55) CAN B Bus (+) circuit.
Is resistance below 1000.0 ohms?
Yes >> Go To 3
No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Totally Integrated Power Module in accordance with the service information.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
8E - 24 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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3. (D55) CAN B BUS (+) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (D55) CAN B Bus (+) circuit.
While monitoring the ohmmeter, disconnect each CAN B Bus module one at a time.
NOTE: This is to determine if the short to ground is internal within a module or if the circuit is shorted.
NOTE: Disconnecting an in-line connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to the wiring diagrams to assist in diagnosis.
Is resistance below 1000.0 ohms with all the CAN B Bus modules disconnected?
Yes >> Repair the (D55) CAN B Bus (+) circuit for a short to ground.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Replace the module that when disconnected the short to ground was eliminated, in accordance with the service information.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 25 |
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U0023-CAN B BUS (+) CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
8E - 26 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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²When Monitored:
Continuously
²Set Condition:
The TIPM detects the (D55) CAN B Bus (+) circuit is shorted to voltage.
Possible Causes
(D55) CAN B BUS (+) CIRCUIT SHORTED TO VOLTAGE
ANY CAN B BUS MODULE
TOTALLY INTEGRATED POWER MODULE
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display this DTC as active?
Yes >> Go To 2
No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Totally Integrated Power Module C6 harness connector. Turn the ignition on.
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
Is voltage above 10.0 volts?
Yes >> Go To 3
No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Totally Integrated Power Module in accordance with the service information.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 27 |
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3. (D55) CAN B BUS (+) CIRCUIT SHORTED TO VOLTAGE
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
While monitoring the voltmeter, disconnect each CAN B Bus module one at a time.
NOTE: When performing the above step, turn the ignition off (wait one minute) before disconnecting any module. When the module is disconnected turn the ignition on to check for a short to voltage.
NOTE: This is to determine if the short to voltage is internal within a module or if the circuit is shorted.
NOTE: Disconnecting an in-line connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to the wiring diagrams to assist in diagnosis.
Is the voltage above 10.0 volts with all the CAN B Bus modules disconnected?
Yes >> Repair the (D55) CAN B Bus (+) circuit for a short to voltage.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Replace the module that when disconnected the short to voltage was eliminated, in accordance with the service information.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
8E - 28 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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U0024-CAN B BUS (-) CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
DR |
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 29 |
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²When Monitored:
With the ignition on and battery voltage between 10 and 16 volts.
²Set Condition:
The TIPM detects the (D54) CAN B Bus (-) circuit is open.
Possible Causes
CAN B BUS TERMINAL PUSH OUT SPREAD CAN B BUS TERMINAL (D54) CAN B BUS (-) CIRCUIT OPEN
INTERNAL OPEN IN A CAN B BUS MODULE
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display this DTC as active?
Yes >> Go To 2
No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. ATTEMPT TO ISOLATE THE OPEN CONDITION
Turn the ignition on.
Verify that all CAN B Bus modules are communicating with the scan tool.
NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
NOTE: If any module is not communicating, perform the appropriate no response test procedure before proceeding.
Turn the ignition off.
Gain access to the Totally Integrated Power Module C6 harness connector, but do not disconnect.
Using a fused jumper wire, connect one end to ground and with the other end backprobe the CAN B Bus (+) circuit at the TIPM C6 harness connector.
Turn the ignition on.
With the scan tool monitor the network status screen and document all modules that display a red X.
Are there any red X's displayed next to the modules?
Yes >> Go To 3
No >> Check backprobe connection to ground, make sure it is proper. The CAN B Bus open DTC may no longer be active, it may be stored. Check all module connections
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
8E - 30 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS |
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3. ATTEMPT TO ISOLATE THE OPEN CONDITION Ð MULTIPLE RED X'S
With the scan tool continue monitoring the network status screen.
Are there multiple red X's displayed next to the modules?
Yes >> The most likely cause of this condition is an open CAN B Bus (-) circuit between a common CAN B Bus splice and the modules that display the red X next to them. Using the wiring diagrams will help you determine where open condition exists.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Go To 4
4. (D54) CAN B BUS (-) CIRCUIT OPEN Ð SINGLE RED X
Turn the ignition off.
Disconnect the module that has the red X displayed next to it.
Turn the ignition on.
Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
Is there any voltage present?
Yes >> Inspect the connector and terminal for damage, inspect for spread terminals, or push out terminals. If ok, replace the module that displayed the red X next to it in accordance with the service information. Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No >> Repair the (D54) CAN B Bus (-) circuit for an open between the next common splice and the module that has the red X displayed next to it. Using the wiring diagrams will help you determine where open condition exists.
Perform BODY VERIFICATION TEST ± VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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