Actuator Supply Voltage D Circuit High
The fourth actuator supply rail is above the expected voltage. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Affected components
- Actuator supply d
- Charging system
Common causes
- Medium likelihood: Alternator regulator failure
- Low likelihood: Wiring shorted to a higher-voltage circuit
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.