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DTC U0073 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010290000201

DTC U0073 | CAN BUS OFF
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DETECTION CONDITION | • CAN controller is damaged. Diagnostic support note • This is a continuous monitor (other). • MIL does not come on. • FREEZE FRAME DATA is not available. • DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Short to ground circuit between TCM terminal 2M and PCM terminal 50 • Short to power circuit between TCM terminal 2J and PCM terminal 49 • CAN communication line short each other • CAN controller damaged.

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to the next step.
No | 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 available repair information. • If vehicle is not repaired, then go to the next step.
No | Go to the next step.
3 | INSPECT TCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • 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 8.
No | Go to the next step.
4 | CHECK CAN COMMUNICATION LINE FOR SHORT TO GROUND • Inspect for continuity between TCM connector terminal 2M (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness, then go to Step 8.
No | Go to the next step.
5 | CHECK CAN COMMUNICATION LINE FOR SHORT TO POWER • Measure the voltage between TCM connector terminal 2J (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Repair or replace the wiring harness, then go to Step 8.
No | Go to the next step.
6 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • 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 8.
No | Go to the next step.
7 | CHECK CAN COMMUNICATION LINE FOR SHORT TO EACH OTHER • Inspect for continuity between PCM connector terminal 49 and 50 (wiring harness-side). • Is there continuity? | Yes | Repair or replace the wiring harness, then go to the next step.
No | Go to the next step.
8 | VERIFY DTC U0073 DETECTED AGAIN • Clear the DTC from the PCM memory using the WDS or equivalent. • Turn the ignition switch off, then start engine. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.