Lost Communication with Drive Motor A Clutch Actuator
ECU lost communication with the drive motor A clutch actuator (engages/disengages drive motor in some hybrid layouts).
Affected components
- Drive motor a clutch
- Can bus
Common causes
- High likelihood: Actuator unpowered or wiring broken
- Low likelihood: Gateway module routing CAN messages incorrectly
- Low likelihood: CAN terminating resistor (120 Ω) drifted out of spec
Possible symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Diagnostic notes
- The malfunction indicator lamp may illuminate
- A drive cycle may be required after repair
- 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.