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Left Front Door Module






B210A - System Voltage Low






For a complete wiring diagram, refer to.

When Monitored: At all times.

Set Condition: When the 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.






Test Step 1 - Check Engine DTCs

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.

Ensure the battery is fully charged and serviceable before proceeding.

With the scan tool, read the engine DTCs

Are there any engine charging or starting DTCs present?

Yes

Perform the appropriate diagnostic procedure.

No

Go to Test Step 2

Test Step 2 - Test for an Intermittent Condition

With the scan tool, record and erase the DTCs

Start the engine and run for two minutes.

With the scan tool, check for DTCs.

Does the scan tool display B210A - System Voltage Low?

Yes

Go to Test Step 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. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - Check the Fused B+ Circuit For High Resistance

Using the scan tool, read the battery voltage of the door module.

Using the scan tool, read the battery voltage of the TIPM (Central Gateway).

Is the voltage within 1.0 volt of each module?

Yes

Replace the door module.

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

No

Go to Test Step 4

Test Step 4 - Check the Voltage At the Door Module Harness

Turn the ignition OFF.

Disconnect the door module C3 Harness connector.

Turn the ignition ON.

Using a voltmeter, measure the voltage between the fused B(+) circuit and the ground in the door module C3 connector.

Is the voltage within one volt of battery voltage?

No

Repair the fused B(+) circuit for high resistance.

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

Yes

Replace the door module.

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