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.
Inspection Procedure
HINT:
- Even though terminal TC is not connected with terminal CG, the MIL blinks.
- For the above phenomenon, an open or short in the wire harness, or malfunction inside the ECM is the likely cause.
- Check voltage between terminals TC and CG of DLC3.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals TC and CG of the DLC3.
OK:
- Voltage: 9 to 14 V
- OK : Check and replace ECM (See PROCEDURE ).
- NG : Go to Next Step
- Check continuity between terminal CG of DLC3 and body ground.
- NG : Repair or replace harness and connector.
- OK : Go to Next Step
- Check for open and short circuit in harness and connector between ECM and DLC3, and DLC3 and body ground (See PROCEDURE
).
- NG : Repair or replace harness adn connector.
- OK : Check and replace ECM (See PROCEDURE ).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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