Electronic Shift Module (ESM) - 8HP45

U1175-00-LOST IGNITION STATUS MESSAGE

For a complete wiring diagram Refer to the Wiring Information.

Theory of Operation

The Electronic Shift Module (ESM) performs various internal tests to verify proper controller operation. This DTC indicates that the ignition status message was not received form the Transmission Control Module (TCM) within a calibrated time.

- When Monitored:
Continuously with the ignition in the run position.

- Set Condition:
BUS messages not received from the TCM within the calibration threshold.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. NAG1 Pre-Diagnostic Troubleshooting Procedure

CHECK FOR ACTIVE DTC
1. Turn the ignition ON.
2. With the scan tool, read the active DTCs.

Does the scan tool display: DTC U1175-00?

Yes

- Perform the NO RESPONSE FROM TCM (TRANSMISSION CONTROL MODULE) - 8HP45 diagnostic procedure. No Response From TCM (Transmission Control Module)

No

- Test complete, the condition or conditions that set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension at the ESM and TCM.
- Perform the ESM VERIFICATION TEST. Verification Tests