How to Read and Erase Diagnostic Trouble Codes

CAUTION:
1. If battery voltage is low, diagnostic trouble codes may not be output. Be sure to check the battery and charging system before continuing.
2. If the battery is disconnected or if the PCM connector is disconnected, the diagnostic trouble code memory will be erased. Do not disconnect the battery or PCM until after the diagnostic trouble codes are recorded.
3. Turn the ignition switch off before connecting or disconnecting the scan tool.

When using the scan tool

NOTE:
1. When diagnostic trouble codes (DTC) are erased, the freeze frame data and readiness test status will be erased at the same time. Therefore, this data should be recorded if necessary before erasing DTCs.
2. If the automatic transaxle DTC (89 (137)/P0700/45) has been stored, the DTC for the PCM should be erased after the DTC for the TCM is erased.

1. Connect the scan tool to the data link connector. If possible, start the engine and turn on the air-conditioning switch (if applicable). Shut off the engine. Leave the key.
2. Read the diagnostic trouble codes.
3. Repair the malfunction while referring to the INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES.
4. Turn the ignition switch to OFF and then back to ON again.
5. Erase the diagnostic trouble codes using the scan tool.
6. Read the diagnostic trouble codes.
Read the scan tool displays "normal".




Inspection Using Scan Tool - Sensor Read Test, Input State Test, Output State Test And Actuator Test And Special Function
1. Carry out inspection by means of the data list and the actuator test function. If there is a malfunction, check and repair the chassis harnesses and components.
2. Re-check using the scan tool and check that the malfunction has been eliminated as a result of the repairs.
3. Erase the diagnostic trouble codes.
4. Remove the scan tool.
5. Start the engine again and road test to confirm that the problem is eliminated.

NOTE:
Refer to Sensor Read Tests.
Refer to Input State Tests.
Refer to Output State Tests.
Refer to Actuator Tests.

CAUTION:
If in the following condition, access the SPECIAL FUNCTION screen to reset the IAC.
- The throttle body or IAC motor has been replaced.
- The IAC motor related circuit has been opened during engine running or IAC motor operation test.