Test 9 - Checking For No Code 88
- Disconnect diagnostic readout box from engine harness connector. Connect a voltmeter to cavity No. 4 of the engine harness connector and ground. Turn ignition switch to the "RUN" position. If voltmeter reads between 4 and 5 volts, voltage is okay. Go to step 2). If voltage is not okay, go to step 3).
- Turn ignition switch off. Disconnect 14-wire connector from computer. Connect ohmmeter between cavity No. 2 of engine harness diagnostic connector and cavity No. 14 of the computer 14-wire connector. If ohmmeter shows continuity, replace computer. If there's no continuity, repair wire of cavity No. 14 for an open circuit to the engine harness connector.
- Disconnect diagnostic readout box. Turn ignition switch off. Disconnect the 14-wire connector from the computer. Connect an ohmmeter between cavity No. 4 of the engine harness connector and cavity No. 1 of the computer 14-wire connector. If ohmmeter shows continuity, replace computer. If there's no continuity, repair wire of cavity No. 1 for an open circuit to the engine harness.