River Door Module (DDM)

B210A-SYSTEM VOLTAGE LOW







- When Monitored:
At all times.

- Set Condition:
When the Totally Integrated Power Module (TIPM) sends a message to the Door Module that the vehicle voltage is below 10.0 volts for over 15 seconds, this code will set.





1. CHECK ENGINE DTCs

NOTE: The most probable cause for this DTC in this module is that the charging system or battery has failed causing a low vehicle system voltage.

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

1. With the scan tool, read the ENGINE DTCs

Are there any ENGINE Charging or Starting DTCs present?

Yes

- Perform the appropriate diagnostic procedure. Testing and Inspection.

No

- Go To 2

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 B210A-SYSTEM VOLTAGE LOW?

Yes

- Go To 3

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE (A215) FUSED B+ CIRCUIT FOR HIGH RESISTANCE
1. Using the scan tool, read the Battery Voltage of the Door Module.
2. Using the scan tool, read the Battery Voltage of the TIPM (Central Gateway).

Is the voltage within 0.6 of a volt of each module?

Yes

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

No

- Go To 4

4. CHECK THE VOLTAGE AT THE DOOR MODULE HARNESS




1. Turn the ignition off.
2. Disconnect the Door Module C3 Harness connector.
3. Using a voltmeter, measure the voltage between the (A215) Fused B(+) circuit and the (Z908) Ground in the Door Module C3 connector.
4. Using a voltmeter, measure the voltage at the battery.

Is the voltage at the module connector within 0.6 of a volt of battery voltage?

No

- Repair the (A215) Fused B(+) circuit or the (Z908) Ground circuit for high resistance.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

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