Sunroof Module (SUNR)

B210A-SYSTEM VOLTAGE LOW

For a complete wiring diagram, refer to the wiring information Electrical Diagrams

- When Monitored:
At all times.

- Set Condition:
When the Sunroof Module detects input voltage below 10.0 volts for over 15 seconds, this code will set.





1. CHECK ENGINE DTCs

NOTE: Ensure the battery is fully charged and serviceable before proceeding.

1. With the scan tool, read ENGINE DTCs

Are there any ENGINE DTCs present?

No

- Go To 2

Yes

- Go to and perform the appropriate diagnostic procedure.

2. TEST FOR INTERMITTENT CONDITION
1. With the scan tool, record and erase DTCs
2. Start the engine and run for two minutes.
3. With the scan tool, read DTCs.

Does the scan tool display B210A-SYSTEM VOLTAGE LOW?

Yes

- Go To 3

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. Body Verification Test.

3. CHECK THE (A906) FUSED B+ CIRCUIT FOR HIGH RESISTANCE
1. Using the scan tool, read the Battery Voltage of the Sunroof Module.
2. Using the scan tool, read the Battery Voltage of the TIPM (Central Gateway).

Is the voltage within 0.2 volt of each module?

Yes

- Replace the Sunroof Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (A906) Fused B+ circuit for high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.