Left Rear Door Module

B210A - System Voltage Low

For a complete wiring diagram, refer to.

• 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.






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.

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

• Start the engine and run for two minutes.

• 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 INTERMITTENT CONDITION

• With the scan tool, record and erase the DTCs.

• Ensure the engine is still running.

• With the scan tool, read the active DTCs.

Does the scan tool display B210A-SYSTEM VOLTAGE LOW as active?

Yes

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

Test Step 3 - CHECK THE (A113) 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 0.6 of a 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 C1 Harness connector.

• Using a voltmeter, measure the voltage between the (A113) Fused B(+) circuit and the (Z908) Ground in the Door Module C1 connector.

• 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?

Yes

• Replace the Door Module.

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

No

• Repair the (A113) Fused B(+) circuit or the (Z908) Ground circuit for high resistance.

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