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