B210A System Voltage Low

B210A System Voltage Low - The Sentry Key Remote Entry Module (SKREEM) also known as the Wireless Control Module (WCM) has detected the system voltage is below 9 volts.

Possible causes DTC B210A System Voltage Low

• Fused ignition switch output (run-start) circuit open.
• Fused (B+) circuit open.
• Wireless Control Module (WCM)/(SKREEM).

Step by step diagnose DTC B210A System Voltage Low

Step 1. Determine if DTC is current

Note: Diagnose any related Powertrain DTCs before continuing.

With the scan tool, read DTCs and clear DTCs. Perform 5 ignition cycles, leaving the ignition switch on for a minimum of 90 seconds per cycle. Using the scan tool, read DTCs?

Does the DTC reset?

YES, go to step 3.

NO, go to step 2.

Step 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.

With the ignition on, wiggle the related wires. Using the scan tool, read DTCs.

Does the DTC reset?

YES, repair the wiring as necessary.

NO, DTC is not active at this time. Test complete.

Step 3. Fused ignition switch output (run-start) circuit open

Note: Check the related fuses to the fused ignition switch ouput (run-start) circuit. If the fuse is found to be open repair the circuit for a shorted condition.

Turn the ignition off, disconnect the WCM harness connector. Turn the ignition on, using a 12 volt test light connected to ground, probe the fused ignition switch output (run-start) circuit in the WCM harness connector.

Does the test light illuminate brightly?

YES, go to step 4.

NO, repair the fused ignition switch output (run-start) circuit for an open.

Step 4. Fused (B+) circuit open

Turn the ignition off, using a 12 volt test light connected to ground. probe the fused (B+) circuit in the WCM harness connector.

Does the test light illuminate brightly?

YES, go to step 5.

NO, repair the fused (B+) circuit for an open.

Step 5. WCM

Note: Repeat the below procedure for both the fused ignition switch output (run-start) circuit and the fused (B+) circuit.

Note: A dirty (pertial) ground can cause abnormal conditions within a sytem. Ensure the module has a good ground before continuing.

Turn the ignition off, reconnect the WCM connector. Back probe the fused ignition switch output (run-start) circuit and then the fused (B+) circuit. Start the engine, using the scan tool, view battery voltage under data display in the engine category. Compare the voltage on the scan tool to the voltage reading on the volmeter.

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

YES, replace and program the WCM. Perform the WCM verification test.

NO, repair the circuits that indicated the incorrect voltage.

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