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DTC U0073 [JA5A-EL]

BME050218901230

DTC U0073 | CAN BUS OFF
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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
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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 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. (See TCM REMOVAL/INSTALLATION [JA5A-EL].)
No | Go to the next step.
4 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure" (See AFTER REPAIR PROCEDURE [JA5A-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [JA5A-EL].)
No | DTC troubleshooting completed.