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.
Selecting System Level
Following trouble code display, first available system will be displayed (i.e., IPC?). When selecting a system to test, any of following actions may be taken to control display:
- Depressing OFF button on ECC panel will stop system selection process and return display to beginning of PCM trouble code sequence.
- Depressing LO (fan down) button on ECC panel will display next available system selection (i.e., IPC?, ACP? or SIR?).
- Depressing HI (fan up) button on ECC panel will select displayed system for testing (i.e., PCM DATA, PCM INPUTS, PCM OUTPUTS, etc.). See Figure .
- Depressing OFF button on ECC panel will exit SERVICE MODE and diagnostics and will return system to normal display and operation.
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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