C2100

C2100 - Battery Voltage LOW






For a complete wiring diagram, refer to.

• When Monitored: With the ignition ON.

• Set Condition: If the anti lock brake module detects system voltage is less than 7.5 volts.






Test Step 1 - DTCs in the PCM

• This DTC must be active for the results of this test to be valid.

• Turn the ignition ON.

• With the scan tool, read and record DTCs from the PCM.

• With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.

• With the scan tool, erase DTCs.

• Start the engine.

• With the scan tool, read and record DTCs.

• With the scan tool read DTCs from the PCM.

Are any charging system codes present?

Yes

• Repair the charging system DTC in the PCM, refer to => Non-DTC Based Diagnostics.

No

• Go to Test Step 2 => [ Test Step 2 - Charging System Failure ]

Test Step 2 - Charging System Failure

• Start the engine.

• Connect voltmeter to vehicle battery.

Is the vehicle battery voltage under 8.2 volts?

No

• Go to Test Step 3 => [ Test Step 3 - Charging Power Supply Voltage ]

Yes

• Repair the charging system.

• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test

Test Step 3 - Charging Power Supply Voltage

• With a scan tool read Power Supply Voltage.

Is power supply voltage under 8.2 volts?

No

• Perform ABS Intermittent Condition Test. Refer to => Non-DTC Based Diagnostics. ABS Intermittent Condition Test

Yes

• Replace the anti lock brake module.

• Perform ABS Verification Test. Refer to => Non-DTC
Based Diagnostics. ABS Verification Test