Control Pilot Signal Frequency Range/Performance
The control pilot PWM frequency from the EVSE is range/performance. SAE J1772 requires 1 kHz +/- tolerance.
Affected components
- Control pilot signal
- Evse
Common causes
- High likelihood: EVSE signal drift
- Medium likelihood: Noise coupling on PWM line
- Low likelihood: Sensor element aged beyond calibration window
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
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.