P1685

P1685-SKIM SYSTEM

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition on.

- Set Condition:
A communication error occurs between the ECM and SKREEM.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. CHECK FOR SKREEM COMMUNICATION AND DTCS
Ignition on, engine not running.
With the scan tool, check for proper communication and active DTCs in the SKREEM.
Are any SKREEM communication problems or DTCs present?

Yes

- Refer to the symptom list for problems related to SKREEM Communication and DTCs before continuing.

No

- Go To 2

2. CHECK FOR ACTIVE DTC
Turn the ignition on.
With the scan tool, clear all ECM DTCs.
Turn the ignition on and off several times pausing 10 seconds between key cycles.
With the scan tool, select View DTCs in the ECM.
Is the status Active for this DTC?

Yes

- Go to 3

No

- Refer to *CHECKING FOR INTERMITTENT DTC Diagnostic Procedure Intermittent Condition.

3. REPLACE THE SKREEM AND RETEST
Replace and program the SKREEM.
Turn the ignition on.
With the scan tool, clear all ECM DTCs.
Turn the ignition on and off several times pausing 10 seconds between key cycles.
With the scan tool, select View DTCs in the ECM.
Is the status Active for this DTC?

Yes

- Replace and program the Engine Control Module.
- Perform the ECM Verification Test Ver. 1. Verification Tests

No

- Test complete.