Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fault Conditions
Control modules communicate with each other in a network via a standardized serial communication method - CAN (Controller Area Network). Electronic throttle module has registered a fault in communication on CAN network. CAN signal from ECM is missing or not updated. ECM-912A is stored in ECM.
No substitute values are used but some systems are disabled.
- Accelerator pedal is ignored when braking
- Cruise control cannot be activated
- RPM is limited using fuel shut off. Maximum permitted engine speed depends on accelerator pedal position.
- Throttle unit follows Pulse Width Modulation (PWM) accelerator pedal signal directly and control signal via CAN is ignored.
The following only applies in combination with ECM-9180 or ECM-918F:
- Throttle unit is in mechanical limp home mode
- Throttle disc is in fixed position
DTC can also cause uneven idle, jerking during engine braking and very poor throttle response.
The following only applies in combination with ECM-9180 or ECM-918F: Maximum speed approximately 32 MPH (50 km/h).
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.