Retrieving Codes
NOTE:
Ensure battery voltage is proper before retrieving codes.
- Turn ignition switch to OFF position. Connect a voltmeter between ground terminal and MPI diagnostic terminal of diagnostic connector, or connect Multi-Use Tester (MUT) Scan Tool (09391-33200 ) to diagnostic connector and cigarette lighter. See Fig 1 . Turn ignition switch to ON position. Trouble codes stored in ECU memory (fault codes) will be displayed.
- If using voltmeter to retrieve fault codes, it is important that voltage signals are accurately timed. Signals will appear in long and short pulses. Long pulses represent first digit of fault code. Short pulses represent second digit. For example, one long pulse followed by 5 short pulses represents Code 15.
- If using scan tool and malfunction indicator light comes on while various checks are being made, check self-diagnostic output.
- After all checks have been made and/or trouble codes have been recorded, make necessary repairs. See CODE CHARTS. After repairs have been made, retest component(s) to ensure problem has been corrected.