P0814

P0814-00-TRANSMISSION RANGE DISPLAY CIRCUIT

For a complete wiring diagram Refer to the Wiring Information.

Theory of Operation

The Shift Lever Assembly (SLA) Electronic Shift Module (ESM) performs various internal tests to verify proper controller operation. This DTC indicates that there is an issue with the SLA circuitry or the ESM internal processor.

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

- Set Condition:
If the ESM detects an error in the backlight circuitry.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 8HP45 Pre-Diagnostic Troubleshooting Procedure

1. CHECK IF THE DTC IS CURRENT

NOTE: Verify the upper shift knob is securely fastened to the lower shift knob.

1. Turn ignition ON, engine NOT running.
2. With the scan tool, clear the DTC.
3. Using the Environmental Data recorded earlier, try to duplicate the conditions in which the DTC set. It may be necessary to test drive the vehicle.
4. With the scan tool, read ESM DTC's.

Did DTC P0814-00 reset?

Yes

- Using the schematics as a guide, check the ESM terminals for corrosion, damage or terminal push out. Pay particular attention to power and ground circuits. Check Service Information Tune-ups or Service Bulletins for possible causes that may apply. If no trouble is found, replace the ESM. Transmission Shifter - Removal.
- Perform the TRANSMISSION VERIFICATION TEST. 8HP45 Transmission Verification Test

No

- Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
4. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the TRANSMISSION VERIFICATION TEST. . 8HP45 Transmission Verification Test

No

- Test Complete.