Reading Diagnostic Trouble Codes

Entering Control Function #1:

EXTRACTING FAULT CODES:
1. Open the diagnostic socket cover and connect the selector cable into the appropriate socket.

^ For fuel injection trouble shooting use socket 2 (of the 6 available).
^ For ignition trouble shooting use socket 6 (of the 6 available).

2. Turn the ignition ON.

3. Enter control function #1 by pressing the button once for at least 1 second, but not more than 3 seconds.

Reading Light Diode:

4. Watch the light diode and count the number of flashes in the three flash series indicating a fault code. Make note of the fault codes.

5. If no fault codes are received by the diagnostic unit, the diode will flash 1-1-1 and the fuel injection system is O.K..

6. If the light diode doesn't flash when the button is depressed, or the light stays on without flashing, refer to, DATA LINK CONNECTOR (DLC).

Checking For More Codes:

7. Retrieve all fault codes stored in the ECU memory by depressing the button a second and third time until the first code is repeated. This means there are no more other codes stored. Remember, all vehicles except California market cars can store only three codes.

8. After the repairs, the vehicle must be driven in order to find and set new codes.

INJECTION SYSTEM CODES:
1-1-1 : No faults, fuel injection system is O.K.
1-1-2 : Fault in fuel injection ECU
1-1-3 : Fault in fuel injector (broken lead, clogged...)
1-2-1 : Signal to/from mass air flow sensor faulty
1-2-3 : Signal missing to/from coolant temperature sensor, possible short circuit
1-3-1 : Ignition system RPM signal missing
1-3-2 : Battery voltage too low or high
1-3-3 : Throttle position switch; idle setting faulty, possible short circuit
2-1-2 : Oxygen sensor (lambda sond) signal missing or faulty
2-1-3 : Throttle position switch; full load setting faulty, possible short circuit
2-2-1 : Oxygen sensor (lambda sond) not operating
2-2-3 : Signal missing to/from idle air valve
2-3-1 : Self-adjusting oxygen sensor (lambda sond) not operating
2-3-2 : Self-adjusting oxygen sensor (lambda sond) not operating
3-1-1 : Signal missing from speedometer
3-1-2 : Signal missing from knock related fuel enrichment
3-2-2 : Hot wire "burn-off cleaning" in mass air flow sensor not operating


IGNITION SYSTEM CODES:
1-1-1 : Ignition system O.K.
1-4-2 : Fault in ignition ECU
1-4-3 : Knock sensor faulty
1-4-4 : Missing air flow meter signal
2-1-4 : Crankshaft position/speed sensor faulty
2-2-4 : Coolant temperature sensor faulty
2-3-4 : Throttle position sensor idle function faulty
2-4-1 : EGR system faulty
4-1-3 : EGR temperature sensor signal missing or faulty