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DTC U0101 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010290000W02

DTC U0101 | PCM cannot receive any signals from TCM
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DETECTION CONDITION | • PCM cannot receive any signals from TCM. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM 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 between TCM terminal 2J and PCM terminal 66 • Open circuit between TCM terminal 2M and PCM terminal 92
• Short to power circuit between TCM terminal 2J and PCM terminal 66
• Short to power circuit between TCM terminal 2M and PCM terminal 92
• Damaged TCM
• Damaged PCM

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Check for related Service Information 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, then go to the next step.
No | Go to the next step.
3 | VERIFY RELATED PENDING CODE OR STORED DTCS • Turn the ignition switch off then to the ON position (Engine off). • Verify related pending code or stored DTCs. • Is DTC U0073 for TCM present? | Yes | Go to appropriate DTC inspection. (See DTC U0073 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Go to the next step.
4 | INSPECT POOR CONNECTION OF TCM CONNECTOR • Turn the ignition switch off. • Disconnect TCM connector. • Check for poor connection (damaged, pulled-out pins, corrosion, etc.). • Is there any malfunction? | Yes | Repair terminal, then go to Step 9.
No | Go to the next step.
5 | CHECK CAN COMMUNICATION LINE FOR SHORT TO GROUND • Check 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 wiring harness, then go to Step 9.
No | Go to the next step.
6 | CHECK CAN COMMUNICATION LINE FOR SHORT TO POWER • Measure voltage between following terminals:

  - TCM connector terminal 2J and body ground
  - TCM connector terminal 2M and body ground

• Is voltage B+?
Yes
Repair or replace wiring harness, then go to Step 9.
No | Go to the next step.
7 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn the ignition switch off. • Disconnect PCM connector. • Check for poor connection (damaged, pulled-out pins, corrosion, etc.). • Is there any malfunction? | Yes | Repair terminal, then go to Step 9.
No | Go to the next step.
8 | CHECK CAN COMMUNICATION LINE FOR OPEN • Disconnect PCM connector. • Check 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 wiring harness, then go to Step 9.
No | Go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC U0101 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start engine and warm it up completely. • Is same PENDING code for this DTC present? | Yes | Replace PCM, then go to the next step.
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.