Self-Diagnosis

SELF-DIAGNOSIS
Always follow the "WORK FLOW" found under "How to Perform Trouble Diagnoses for Quick and Accurate Repair". Flow of Diagnosis

The SELF-DIAGNOSIS results will be as follows:
- The first SELF-DIAGNOSIS will indicate the damage of the vehicle speed sensor or the revolution sensor.
- During the next SELF-DIAGNOSIS performed after checking the sensor, no damages will be indicated.

OBD-II
In accordance with the OBD-II requirements, A/T self-diagnoses have been improved as follows:
- On the former models (S13), the A/T control unit performed the self-diagnoses for A/T self-diagnostic items, and illuminated the OD OFF indicator lamp to indicate the self-diagnostic results. On this model (S14), the engine control module also receives the A/T self-diagnostic results and illuminates the malfunction indicator lamp (MIL) to indicate the results.
- The number of self-diagnostic items has increased. Increased items can not be indicated by the OD OFF indicator lamp. For details, refer to the table under "Diagnosis by CONSULT". Diagnosis by CONSULT
- The self-diagnostic results indicated by the MIL are automatically stored in the ECM and A/T control unit memories. The results stored in the memories (of both ECM and A/T control unit) must be erased each time after repairing the malfunctioning part.
- The following can be used to display the self-diagnostic results indicated by the MIL and to erase the results stored in the ECM and A/T control unit memories. For details, refer to "How to Erase Diagnostic Trouble Codes". Clearing Trouble Codes

ECM memory A/T control unit memory
CONSULT (Select ENGINE) CONSULT (Select A/T)
Generic Scan Tool (GST) On-board self-diagnosis
Mode selector on ECM

- As for the malfunctions indicated by the MIL, the relevant data (sensor signals, ECM signals, etc.) obtained at the moment of detection can be verified by Freeze Frame Data.