Wireless Control Module (WCM)

B2101-IGNITION RUN/START INPUT CIRCUIT LOW







- When Monitored:
With the ignition switch on.

- Set Condition:
The Wireless Control Module (WCM) has detected the ignition switch input voltage below a calibrated value.





1. CHECK FOR ACTIVE DTC

NOTE: Verify all related fuses are OK before proceeding with this test. Repair if necessary.

1. Turn the ignition on.
2. With a scan tool, read, record and erase WCM DTCs.
3. Turn the ignition off for 30 seconds, then back on.
4. Using the scan tool, read WCM DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. WIRELESS CONTROL MODULE (WCM)




1. Turn the ignition off.
2. Disconnect the WCM harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch output (Run-Start) circuit in the WCM harness connector.

Does the test light illuminate brightly?

Yes

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

No

- Go To 3

3. (A106) FUSED B+ CIRCUIT




1. Turn the ignition off.
2. Disconnect the Ignition Switch harness connector.
3. Using a 12-volt test light connected to ground, probe the (A106) Fused B+ circuit in the Ignition Switch harness connector.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Using the wiring diagram as a guide, repair the (A106) Fused B+ circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN




1. Using an ohmmeter, measure the resistance of the (F20) Ignition Switch Output (Run-Start) circuit.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Ignition Switch in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (F20) Ignition Switch Output (Run-Start) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.