DTC U0073 [JA5A-EL]

BME050218901230

DTC U0073

CAN BUS OFF

DETECTION CONDITION

• The CAN controller is damaged.
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

• CAN controller is damaged.

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 PID DATA on the 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 repair information available?
Yes
Perform repair or diagnosis 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 DTC U0073 DETECTED AGAIN
• Clear the DTC from the TCM memory using the WDS or equivalent.
• Turn the ignition switch to the LOCK position, then start the engine.
• Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
No
Go to the next step.
4
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure"
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.