NAG1 Shifter - ESM

P0563-BATTERY VOLTAGE HIGH - ESM

For a complete wiring diagram Refer to Diagrams/Electrical Electrical Diagrams


- When Monitored:

Continuously with the ignition in the run position.

- Set Condition:

When the monitored battery voltage rises above 16.0 volts.







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


Theory of Operation


The Shift Lever Assembly monitors ignition voltage. The DTC will set, if the monitored battery voltage rises above 16.0 volts.



Diagnostic Test


1. CHECK FOR CHARGING SYSTEM DTCs

With the scan tool, read Engine DTCs.


NOTE: This includes any one trip faults.

Are there any Engine Charging System DTCs present?

Yes


- Perform NAG1 TRANSMISSION VERIFICATION TEST. NAG1 Transmission Verification Test

No

- Go To 2



2. VEHICLE WAS JUMP STARTED INCORRECTLY

Verify if the vehicle was jump started by another vehicle using a 24-volt charging system or incorrectly jump started with the 12 volt battery in series.

Was the vehicle jump started by another vehicle?

Yes

- This is the cause of the DTC. Erase the DTC and return the vehicle to the customer.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. NAG1 Transmission Verification Test

No

- Go To 3



3. SHIFT LEVER ASSEMBLY

Reconnect all disconnected harness connectors.

With the scan tool, erase Shift Lever DTC's.

Start the engine and raise the engine speed to 2000 RPM.

With the scan tool, read Shift Lever DTC's.

Did the P0563-BATTERY VOLTAGE HIGH DTC reset?

Yes

- Replace the Shift Lever Assembly
- Perform NAG1 TRANSMISSION VERIFICATION TEST. NAG1 Transmission Verification Test

No

- Test Complete.