If two or more systems are non-functional, they are indicated in order of increasing code number. Indication is made by deflection of the multimeter pointer. A constant 12 volts indicates system is normal. If system is abnormal, voltmeter will alternate between 0-12 volts every .4 seconds to display codes. After indication of zero volts for 2 seconds, the higher code is indicated.
Location: The two locations are either a 2 wire plug right next to the air cleaner or the plug above the glovebox that works the same. Note: The 83-86 have no plug above the glovebox, just the one under-hood.
NOTE: ECU abnormal diagnostic memory is kept by direct power from the battery. Memory is not erased by turning the ignition off, but will be erased if the battery or ECU is disconnected. (30 seconds)
Make sure the engine has been running a while. (10 mins) Engine must be running to check O2 Sensor.
- 1 - Oxygen Sensor
- 2 - Ignition Pulse
- 3 - Air Flow Sensor
- 4 - <Cordia/Tredia Only>
- 5 - Throttle Position Sensor
- 6 - ISC Motor Position Switch
- 7 - Water Temperature Sensor
Astaroth.