Retrieving Trouble Codes
NOTE:
Read the SELF-DIAGNOSTIC SYSTEM OVERVIEW section (above) for a few quick tips regarding the diagnostic system.
- Before proceeding, make sure the:
- "CHECK ENGINE" light circuit is functional. It should be ON when the ignition switch is ON with the engine stopped. See Figure for location. If the light is not ON, see CHECK ENGINE LIGHT WILL NOT COME ON .
- Battery voltage is above 11 volts.
- Throttle valve is fully closed (Throttle Position Sensor IDL points closed).
- Accessory switches (A/C, etc.) are OFF.
- Engine is at normal operating temperature (if possible).
- Turn ignition switch to ON position. Do not start the engine. Place a jumper wire across TE1 and E1 terminals in engine check connector located near the No. 2 relay block. See Fig 1.
- Count number of flashes from "CHECK ENGINE" light. If system is operating normally (with no detected faults), the "CHECK ENGINE" light will blink continuously and evenly about 2 times a second. See Fig 3.
- Otherwise, the light will blink a number of times equal to the trouble code as follows (see Fig 4):
- The light blinks evenly (.5 second ON, .5 second OFF) when indicating a number.
- The light will be OFF for 1.5 seconds between the first digit and the second digit of the code.
- If more than one code is stored, the light will be OFF for 2.5 seconds before the next code is displayed.
- Once all code(s) have been displayed, the light will be OFF for 4.5 seconds and then the whole sequence will repeat.
- The diagnostic code series will continue to repeat as long as the check connecter terminals TE1 and E1 are connected.
- When finished, remove the jumper wire. Proceed to the TROUBLE CODE DEFINITIONS/CHARTS section for code definition and possible causes.
- After repairing the malfunction, clear the codes from the ECU's memory. See the CLEARING TROUBLE CODES section.