P1C8C-17

P1C8C-17-SYSTEM VOLTAGE-CIRCUIT VOLTAGE ABOVE THRESHOLD

For a complete wiring diagram Refer to the Wiring Information.

Theory of Operation

The Electronic Shift Module (ESM) monitors ignition voltage. The DTC will set, if the monitored voltage is above 16.0 volts.

- 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 Pre-Diagnostic Troubleshooting procedure before proceeding. 8HP45 Pre-Diagnostic Troubleshooting Procedure

1. CHECK FOR CHARGING SYSTEM DTCS
1. With the scan tool, read Engine DTCs.

NOTE: This includes one trip faults.

Are any Engine Charging System DTCs present?

Yes

- Charging System Perform the appropriate diagnosis.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.

No

- Go To 2

2. VEHICLE WAS JUMP STARTED INCORRECTLY
1. 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. Clear the DTC and return the vehicle to the customer.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.

No

- Go To 3

3. CHECK SYSTEM VOLTAGE
1. Start the engine and let idle for at least 10 seconds.
2. With the scan tool, monitor system voltage.

Is the system voltage above 16V for more than 5 seconds?

Yes

- Charging System Perform the appropriate diagnosis.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.

No

- Go To 4

4. SHIFT LEVER ASSEMBLY
1. Reconnect all disconnected harness connectors.
2. With the scan tool, clear ESM DTC's.
3. Start the engine and raise the engine speed to 2,000 rpm.
4. With the scan tool, read ESM DTC's.

Did the DTC reset?

Yes

- Replace the Shift Lever Assembly. Transmission Shifter - Removal.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.

No

- Test Complete.