U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (SKREEM/WCM)

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on.
Battery voltage between 10 and 16 volts.
Airbag fuse installed.
TIPM is configured correctly.
Set Condition:
Bus messages not received from the Sentry Key Remote Entry Module (WCM) for approximately 2 to 5 seconds.

Possible Causes

CAN B BUS CIRCUITS OPEN OR SHORTED

DTC'S RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES

TIPM NOT CONFIGURED CORRECTLY

SENTRY KEY REMOTE ENTRY MODULE POWER AND GROUND

SENTRY KEY REMOTE ENTRY MODULE

MODULE THAT SET THIS DTC

1.VERIFY DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

Is this DTC active?

Yes

2.CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S

NOTE: Check for CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTC's.

Does the scan tool display any active DTC's to the conditions listed above?

Yes

Diagnose and repair the DTC. Refer to the Table of Contents for a complete list of the symptoms.

3.VERIFY THAT THE WCM IS ACTIVE ON THE BUS

Is the WCM active on the bus?

Yes

4.CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S

Is there more than one module with active DTC's “Logged Against” the WCM?

Yes

Replace/update the Sentry Key Remote Entry Module in accordance with the service information.
Perform the SKREEM VERIFICATION TEST. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD PROCEDURE).

Replace/update the module that set this DTC in accordance with the service information.
Perform the appropriate VERIFICATION TEST.