Diesel

P0730-INCORRECT GEAR RATIO

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition on.

- Set Condition:
The ECM receives a CAN Bus message indicating the presence of a DTC in the TCM.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. VERIFY CURRENT DTC

NOTE: Diagnose and repair all ECM DTCs prior diagnosing any DTCs set in the TCM.

NOTE: This code was set in the ECM by the Transmission Control Module to indicate a transmission fault. Diagnosis of transmission faults should be done using the Transmission Diagnostic Information.

NOTE: When repairs have been completed, DTCs in the ECM and TCM must be cleared.

Turn the ignition on.
With the scan tool, erase ECM DTCs only.
With the scan tool, read ECM DTCs.
Does this DTC reset?

Yes

- Refer to Transmission Diagnostic Information for the related symptom(s).

No

- Test Complete.