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.
Trouble Shooting: Notes
System problems may be caused by engine, EC-AT, hydraulic control system or electronic control system. When trouble shooting, start with those points that can be inspected quickly and easily. Recommended trouble shooting sequence is as follows:
- Check for fault codes. See ELECTRONIC DIAGNOSIS . If fault code is present, see appropriate DIAGNOSTIC CODE CHARTS .
- Check signals to and from PCMT with Self-Diagnosis checker and System Selector (SST). See ELECTRICAL SIGNAL TEST .
- Check stall speed, time lag, line pressure and throttle pressure. See MECHANICAL TESTING .
- Road test vehicle and check for proper transmission operation. See ROAD TEST .
If previous trouble shooting sequence is followed, cause of the problem should be located. Another way to find EC-AT problems is to use appropriate QUICK DIAGNOSIS & TROUBLE SHOOTING CHART . These charts show various problems and relationship of components that might be cause of problem.
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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.