U0236

U0236-LOST COMMUNICATION WITH COLUMN LOCK MODULE







- When Monitored:
Continuously.

- Set Condition:
If the Wireless Control Module (WCM) does not receive the correct response message back from the Steering Column Lock Module.





1. INTERMITTENT DTC
1. With the scan tool, erase the current WCM DTCs.
2. Turn the ignition off.
3. Arm the Vehicle Theft and Security System (VTSS) and wait one minute.
4. Disarm the VTSS and turn the ignition on.

Does the scan tool display the same DTC?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Inspect the related wiring harness for a possible intermittent condition. Look for any chafed, pierced, pinched or partially broken wires.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test

2. (A952) FUSED B(+) CIRCUIT OPEN




1. Gain access to the Steering Column Lock Module.
2. Disconnect the Steering Column Lock Module connector.
3. Using a 12-volt test light connected to ground, check the (A952) Fused B(+) circuit in the Steering Column Lock Module connector.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the (A952) Fused B(+) circuit for an open.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test

3. (A892) IGNITION SWITCH OUTPUT (KEY-IN) CIRCUIT OPEN




1. Using a 12-volt test light connected to ground, check the (A892) Ignition Switch Output (Key-In) circuit in the Steering Column Lock Module connector while fully inserting and removing the key from the Ignition Switch

Does the test light toggle On and Off?

Yes

- Go To 4

No

- Check the (A952) Fused B(+) circuit for an open to the ignition switch C2 connector, if OK check the (A892) Ignition Switch Output (Key-In) circuit from the Ignition Switch to the Steering Column Lock Module for an open, if that circuit is OK replace the Ignition Switch.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test

4. (Z910) GROUND CIRCUIT OPEN




1. Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit at the Steering Column Lock Module connector.

Does the test light illuminate brightly?

Yes

- Go To 5

No

- Repair the (Z910) Ground circuit for an open.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test

5. (D508) TIRE PRESSURE BUS CIRCUIT OPEN




1. Disconnect the Sentry Key Remote Entry/WCM harness connector.
2. Measure the resistance of the (D508) Tire Pressure Bus circuit between the WCM and the Steering Column Lock Module connectors.

Is the resistance below 1.0 ohms?

Yes

- Replace the Steering Column Lock Module.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test

No

- Repair the (D508) Tire Pressure Bus circuit for an open.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test