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.
Checking Wiring And Terminals
Avoid touching the pins in the control module and the corresponding connector on the cable harness.
There is a risk of static discharge which could damage the control module.
Discharge yourself and tools to be used by holding the tool's metal part and touching a body part on the car just before starting to work.
Check the cable between the Engine Control Module (ECM) terminal #B15 and Transmission Control Module (TCM) terminal #A5. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Remedy as necessary.
Was a fault detected?
- YES
Refer to VERIFICATION
- NO
Refer to OTHER FAULT-TRACING
NO RELATED
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.