C2101-BATTERY VOLTAGE HIGH
C2101-BATTERY VOLTAGE HIGH
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on.
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Set Condition:
If the Anti-Lock Brake Module detects system voltage is above 17 volts.
Possible Causes |
|---|
| ECM/PCM DTCs PRESENT |
| VEHICLE BATTERY / CHARGING SYSTEM |
| ANTI-LOCK BRAKES MODULE |
1. ACTIVE CHARGING SYSTEM DTCs
| NOTE: | This DTC must be active for the results of this test to be valid. |
| 1. | Turn the ignition on. |
| 2. | With the scan tool, read and record DTCs from the ECM/PCM. |
| 3. | With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set. |
| 4. | With the scan tool, erase DTCs. |
| 5. | Start the engine. |
| 6. | With the scan tool, read and record DTCs. |
| 7. | With the scan tool read DTCs from the PCM. |
Are any charging system codes present?
Yes
- Repair the charging system DTC in the ECM/PCM (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing).
- Perform the POWERTRAIN VERIFICATION TEST (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Go To 2
| 1. | Start the engine. |
| 2. | Connect voltmeter to vehicle battery. |
Is the vehicle battery voltage over 16.8 volts?
No
- Go To 3
Yes
- Repair the charging system per service information.
- Perform ABS VERIFICATION TEST (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
3. CHARGING POWER SUPPLY VOLTAGE
| 1. | With a scan tool read Power Supply Voltage. |
Is Power Supply Voltage over 16.8 volts?
No
- Perform ABS INTERMITTENT CONDITION TEST (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
Yes
- Replace the Anti-Lock Brake Module in accordance with the Service Information.
- Perform ABS VERIFICATION TEST (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).