DTC U0100 [JA5A-EL] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME050200000W01

DTC U0100

TCM cannot receive any signals from PCM

DETECTION CONDITION

• If the TCM cannot receive any signals from the PCM, the TCM determines that there is a malfunction.
Diagnostic support note:
• This is continuous monitor (CCM).
• The MIL illuminates if the TCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• The HOLD indicator light flashes.
• The DTC is stored in the TCM memory.

POSSIBLE CAUSE

• Short to ground circuit between TCM terminal 2J and PCM terminal 66
• Short to ground circuit between TCM terminal 2M and PCM terminal 92
• Open circuit in wiring harness between TCM terminal 2J and PCM terminal 66
• Open circuit in wiring harness between TCM terminal 2M and PCM terminal 92
• Short to power supply circuit between TCM terminal 2J and PCM terminal 66
• Short to power supply circuit between TCM terminal 2M and PCM terminal 92
• Damaged TCM
• Damaged PCM

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related Service Bulletins and/or on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnostic according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED DTC OR STORED DTCS
• Turn the ignition switch to the LOCK position then ON position (engine off).
• Verify the related stored DTCs.
• Is DTC U0073 for the TCM present?
Yes
Go to the appropriate DTC inspection.
No
Go to the next step.
4
INSPECT POOR CONNECTION OF TCM CONNECTOR
• Turn the ignition switch to the LOCK position.
• Disconnect the TCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair the terminal, then go to Step 9.
No
Go to the next step.
5
INSPECT CAN COMMUNICATION LINE FOR SHORT TO GROUND
• Inspect for continuity between following terminals:
- TCM connector terminal 2J and body ground
- TCM connector terminal 2M and body ground
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 9.
No
Go to the next step.
6
INSPECT CAN COMMUNICATION LINE FOR SHORT TO POWER SUPPLY
• Measure the voltage between the following terminals:
- TCM connector terminal 2J and body ground
- TCM connector terminal 2M and body ground
• Is the voltage B+?
Yes
Repair or replace the wiring harness, then go to Step 9.
No
Go to the next step.
7
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch to the LOCK position.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair the terminal, then go to Step 9.
No
Go to the next step.
8
INSPECT CAN COMMUNICATION LINE FOR OPEN CIRCUIT
• Disconnect the PCM connector.
• Inspect for continuity between following terminals:
- TCM connector terminal 2J and PCM connector terminal 66
- TCM connector terminal 2M and PCM connector terminal 92
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to the next step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC U0100 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from TCM memory using the WDS or equivalent.
• Start the engine and warm it up completely.
• Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure"
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.