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Sunroof Module






B210D - Battery Voltage Low

For a complete wiring diagram, refer to.

When Monitored: At all times.

Set Condition: Anytime the module senses voltage input below 9.0 volts (motor operating or not). After this code is set, it becomes stored when the voltage exceeds 9.1 volts.






Test Step 1 - Check Engine DTCs

Ensure the battery is fully charged before proceeding.

With the scan tool, read engine DTCs.

Are there any engine battery or charging system DTCs present?

No

Go to Test Step 2

Yes

Refer to symptom list for problems related to engine.

Test Step 2 - Test for an Intermittent Condition

With the scan tool, record and erase DTCs

Start the engine and run for 2 minutes.

Turn the ignition OFF.

Turn the ignition ON.

With the scan tool, check for DTCs.

Does the scan tool display B210D - Battery Voltage Low, in the sunroof module only?

Yes

Go to Test Step 4

No

The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - Check the Sunroof Motor/Module

To further diagnose the sunroof, it is necessary to lower or remove the headliner.

Turn the ignition OFF.

Disconnect the sunroof motor/module harness connector.

Ensure the A - Pillar connector is connected before proceeding.

Test for an open or high resistance on the fused B+ circuit by connecting a 12 volt test lamp between the fused B+ circuit and the ground circuit in the sunroof motor/module harness connector. The test lamp must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test lamp illuminate brightly?

Yes

Replace the sunroof motor/module.

Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No

Go to Test Step 4

Test Step 4 - Check Fused B+ and Ground Circuits for an Open

Ensure the A - Pillar connector is connected before proceeding.

Using a 12 volt test lamp connected to 12 volts, probe the ground circuit in the sunroof motor/module harness connector. the test lamp must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test lamp illuminate brightly?

Yes

Repair the fused B+ circuit for an open or high resistance.

Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

Repair the ground circuit for an open or high resistance.

Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior