Reading and Clearing Diagnostic Trouble Codes

USING THE SCAN TOOL
1. Connect the scan tool to the data link connector.

CAUTION: Connection and disconnection of the scan tool should always be made with the ignition switch in the OFF position.

2. Take a reading of the diagnostic output.
3. Repair the problem location, referring to the diagnostic chart.
4. After turning the ignition switch once to OFF, turn it back to ON.






USING THE VOLTMETER
1. Connect an analog voltmeter to the diagnostic output terminal (No. 6 terminal) and the ground terminal (No. 4 or 5 terminal) of the data link connector.

CAUTION: When connecting the voltmeter to the ground terminal (No. 4 or 5 terminal), use the special tool (diagnostic trouble code check harness).





2. Determine the diagnostic output from the voltmeter pointer deflection.
3. Repair the problem location, referring to the Diagnostic Charts.