Wireless Control Module (WCM)

B210D-BATTERY VOLTAGE LOW

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition key in any position but run.

- Set Condition:
The Sentry Key remote Entry Module (SKREEM) also known as the Wireless Control Module (WCM) has detected the Fused (B+) input voltage below 9 volts with the Key in any position except for RUN.





1. DETERMINING IF DIAGNOSTIC TROUBLE CODE (DTC) IS CURRENT

NOTE: Diagnose any related Powertrain DTCs before continuing.

1. With a scan tool, read and record DTCs.
2. With the scan tool, clear DTCs.
3. Perform 5 ignition cycles, leaving the ignition switch on for a minimum of 90 seconds per cycle.
4. Using the scan tool, select View DTCs.

Does the DTC reset?

Yes

- Go To 3

No

- Go to 2

2. INTERMITTENT CONDITION

NOTE: Check for any of the follow conditions:
- Poor wire to terminal connection
- Corroded terminals
- Backed out or loose terminals
- Broken wire internal to the insulation
- Dirty (partial) module ground

1. With the ignition on, wiggle the related wires.
2. Using a scan tool, View DTCs.

Does the DTC reset?

Yes

- Repair the wiring as necessary.
- Perform the WCM VERIFICATION TEST. Wireless Control Module (WCM) Verification Test

No
DTC is not active at this time. Test complete.

3. FUSED (B+) CIRCUIT OPEN

NOTE: Check the related fuses to the Fused (B+) circuit. If the fuse is found to be open repair the circuit for a shorted condition.

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

Does the test light illuminate brightly?

Yes

- Go to 4

No

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

4. SKREEM

NOTE: A dirty (partial) ground can cause abnormal conditions within a system. Ensure the module has a good ground before continuing.

1. Turn the ignition off.
2. Reconnect the SKREEM connector
3. Back probe the Fused (B+) circuit.
4. Start the engine.
5. Using the scan tool, view battery voltage under Data Display in the Engine category.
6. Compare the voltage on the scan tool to the voltage reading on the voltmeter.

Is the voltage on the scan tool equal to the voltmeter reading +/-.5 volt?

Yes

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

No

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