Displaying & Reading Trouble Codes

Process troubleshooting for electronic control system by using On-Board Diagnostic System and systematic troubleshooting to find the defective area.

1. After test driving, hold engine running in P position applied with parking brake.





2. Connect voltmeter probes to monitor coupler (green coupler) under dash panel beside steering column at the right.
3. Using a coupler with lead, make a short-circuit at DIAG SW coupler (black coupler) beside monitor coupler.





4. To read diagnostic trouble code, watch swing of voltmeter indicator.

NOTE:
- Frequency of code signal is the same with the engine ECM.
- All applicable code will be indicated from smaller number to larger number in order.
- Code memory, if any, will be erased when ignition switch is turned OFF.
- Instead of using voltmeter, code may be read by connecting small bulb (12V - 1.4 or 3.4W) into monitor coupler.
- Ignition signal is used for fail-safe but is not a factor of shift control.