Without Scan Tool
EXTRACTING FAULT CODESIf the "CHECK" engine light has been reported on, you can extract the fault codes as follows:
Service Check Connector / Data Link Connector:
1. Connect the Service Check Connector terminals with a jumper wire (the Service Check Connector is located behind the center console).
CAUTION: DO NOT connect the jumper wire to the three pin Data Link Connector which is next to the Service Check Connector.
Malfunction Indicator Lamp:
Diagnostic Trouble Codes:
2. The Malfunction Indicator Light indicates a failure code by blinking frequency. The Malfunction Indicator Light can indicate any number of simultaneous component problems by blinking separate codes, one after another. Problem codes 1 through 9 are indicated by individual short blinks. Problem codes 10 through 43 are indicated by a series of long and short blinks. The number of long blinks equals the first digit, the number of short blinks equals the second digit.
3. Remember to remove the jumper wire when you are done extracting fault code(s).
NOTE: If codes other than those listed are indicated, count the number of blinks again. If the MIL is in fact blinking out these codes then replace the Programmed Fuel Injection Electronic Control Module (PGM-FI) ECM.
NOTE: If the Malfunction Indicator Light is on while the engine is running, jump the service connector. If no code is displayed (MIL stays on steady) the back-up system is in operation. Substitute a known good PGM-FI ECM and recheck. If the indication goes away then replace the original PGM-FI ECM.