B1D53

B1D53-SWITCH POWER SUPPLY CIRCUIT LOW

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

- When Monitored:
At all times.

- Set Condition:
Anytime the module senses voltage input below 9.0 volts for over 15 seconds, this code will set.





1. CHECK ENGINE DTCs

NOTE: Make sure the battery is fully charged before proceeding.

1. With the scan tool, read ENGINE DTCs

Are there any active BATTERY OR CHARGING SYSTEM DTCs?

No

- Go To 2

Yes

- Perform the appropriate diagnostic procedure.
- For gas engines, Testing and Inspection.
- For diesel engines, Testing and Inspection.

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

Does the scan tool display B210D-BATTERY 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. (A931) FUSED B(+) CIRCUIT RESISTED




1. Disconnect the Door Module C1 connector
2. Test for a resisted (A931) Fused B(+) circuit by connecting a 12-volt test light between the (A931) Fused B(+) circuit and the (Z- - -) Ground circuit in the Door Module connector. The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

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

No

- Test the (A931) Fused B(+) and the Ground circuits to determine which one has the high resistance. Repair the (A931) Fused B(+) circuit or the (Z- - -) Ground circuit for high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.