Diagnostic Test
WARNING: This page is about a different car, the 2011 RAM Dakota. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR ACTIVE DTC NOTE:
With the scan tool, verify communication with the SKREEM/WCM. Diagnose any loss of communication faults.
NOTE:Diagnose any SKREEM/WCM DTCs present before proceeding with test.
- With the scan tool, read the active DTCs.
- Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 30 seconds.
- With the scan tool, read the active DTCs.
Does the scan tool display this DTC as active?
Yes
- Go To 2.
No
- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- VERIFY IGNITION SWITCH STATUS USING SCAN TOOL
- Using the scan tool, read the Ignition Switch status in the SKREEM/WCM, and the FCM.
- This information is located in the "Data Display" section for each module.
Does the "Data Display" information on the scan tool match with the status of the Ignition Switch?
Yes
- Go To 3.
No
- Using the wiring diagrams and Service Information, diagnose any Ignition Switch faults.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- (F20) IGNITION SWITCH SENSE INPUT CIRCUIT OPEN
- Turn the ignition off.
- Disconnect the IPM C1 harness connector.
- Disconnect the Ignition Switch harness connector.
- Measure the resistance of the (F20) Ignition Switch Sense Input circuit between the IPM C1 and Ignition Switch harness connectors.
Is the resistance above 10K ohms?
Yes
- Repair the (F20) Ignition Switch Sense Input circuit for an open.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Replace the FCM in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .