P1652

P1652-J1850 SHORT TO GROUND





For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

While the ignition is on.

- Set Condition:

The ECM detects a short to ground on the J1850.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. ECM





Turn the ignition off.

Disconnect the ECM harness connectors.


NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between the (D25) J1850 circuit in the ECM harness connector and battery negative.

Is the resistance less than 10 Ohms?

Yes

- Go To 2

No

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

2. (D25) J1850 SHORTED





Measure the resistance between the (D25) J1850 circuit and all other circuits in both ECM connectors.

Is the resistance greater than 100k ohms?

Yes

- Refer to appropriate testing.

No

- Repair (D25) J1850 shorted to another circuit.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test