Battery Charger Coolant Control Valve Control Circuit High
Voltage on the battery charger coolant control valve control line is above the expected window. The on-board charger negotiates voltage, current and safety with the EVSE; a fault interrupts charging or limits it to AC slow-charge despite a DC fast charger being attached.
Affected components
- Battery charger coolant valve
- Wiring harness
Common causes
- High likelihood: Wire shorted to B+
- Medium likelihood: Coil open
- Low likelihood: Connector pins corroded - high contact resistance
Possible symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
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.