Reading and Clearing Diagnostic Trouble Codes

HOW TO READ DIAGNOSTIC TROUBLE CODES




When using the scan tool
1. Connect the scan tool to the data-link connector 1 to read out the diagnostic trouble codes.

CAUTION: Turn off the ignition switch beforehand whenever the scan tool is connected or disconnected.

2. Refer to the diagnostic chart and repair the defective point.




When using a voltmeter
Connect a voltmeter to the diagnostic output terminal and the ground terminal of the data-link connector 1 using the special tool. Observe the voltmeter pointer deflection to read out the diagnostic trouble codes.




HOW TO READ DIAGNOSTIC TROUBLE CODES FROM A VOLTMETER

NOTE: Other on-board diagnostic items are also output as voltage waveforms corresponding to diagnostic trouble code numbers.

HOW TO ERASE DIAGNOSTIC TROUBLE CODES
The diagnostic trouble codes can be erased by disconnecting the (-) cable from the battery for 10 seconds or more and then re-connecting it, or by the following procedure.
1. Turn the ignition switch to ON.
2. With the SET switch at the ON position, turn the main switch to ON, and within 1 second after this, turn the RESUME switch to ON.
3. With the SET switch once more at the ON position, turn the stop light switch ON for a continuous period of 5 seconds or more.




HOW TO READ INPUT SWITCH CODES
1. Connect a scan tool or a voltmeter to the data link connector 1.

NOTE: Connect a voltmeter using the same procedure as for inspection of diagnostic output.

2. Set the ignition switch to ON.
3. With the SET switch in the ON state, set the main switch to ON. In less than 1.0 second thereafter, set the RESUME switch to ON. Then the input check results can be displayed.
4. Perform the individual input operations according to the input check table and read the codes.




Input Inspection Table