Input Codes
- Turn ignition on. Engine warning light (on instrument panel) should come on. Start engine. Engine warning light should go off. Drive vehicle for at least 5 minutes to store necessary information in control unit memory. During test drive, accelerate engine above 3000 RPM and briefly accelerate using full throttle.NOTE: If engine will not start, crank starter for at least 5 seconds. Return ignition key to "ON" position. Fault codes may now be read.
- DO NOT
turn ignition off as this will erase control unit memory. Install a fuse in test terminal of fuel pump relay (in fuse/relay panel) for a minimum of 4 seconds and then remove. See Fig 1
.NOTE: Careful attention must be paid to flashing light, since there are no discernible break points between 4-digit number groups.
- Engine warning light will flash on for 2 1/2 seconds and then off for 2 1/2 seconds. Trouble codes will then be flashed as 4 digit numbers. After each flash there will be a 1/2 second pause before the next flash occurs. Adding flashes together will obtain each code digit.
- After each digit code is flashed, there will be a 2 1/2 second pause. After fourth digit of number is flashed, a 2 1/2 second pause will follow before the fault code is repeated.
- The fault code will be repeated until the ignition is turned off. Record fault code. Check the list of input codes and possible problems. See Fig 2 .
- Check and repair circuits and/or sensors as indicated, see appropriate test in the ELECTRICAL COMPONENTS testing procedures in this article. After the fault is corrected, repeat step 1) and check for additional codes.