Without Scan Tool

Computerized Engine Control System (EGI):

When problems occur in ECU monitored input or output devices, test the system to find the cause. During testing, failures of input and output devices are retrieved from the ECU as malfunction code numbers and displayed on the dash mounted malfunction indicator light (MIL).

NOTE: The ECU continuously checks for input device malfunctions. However, it only checks for output device malfunctions in a 3 second period after the ignition switch is turned "ON" with test connector grounded. If there is more than one malfunction code present, the lowest number code is displayed first, followed by subsequent codes in numerical order.

INSPECTION PROCEDURE

1. Warm up engine to operating temperature and turn ignition "OFF."
2. Ground test connector (Green: 1-pin) with a jumper wire.

Check Connector:

NOTE: Test connector is located next to the check connector in the engine compartment near the left side strut tower.

3. Turn ignition switch "ON."
4. If MIL illuminates, goes off, and stays off, no codes are present.
5. If MIL illuminates, goes off, and then starts flashing, codes are present.
6. Start engine and check for additional codes.
7. If any codes are retrieved, check for causes. Testing and Inspection

AFTER-REPAIR PROCEDURE

1. Erase ECU malfunction code memory by disconnecting the negative battery cable and depressing the brake pedal for at least five seconds. Reconnect battery cable.
2. Ensure engine is at normal operating temperature. Ground test connector.
3. Turn ignition switch "ON."
4. If MIL illuminates, goes off, and stays off, no codes are present.
5. If MIL illuminates, goes off, and then starts flashing, codes are present.
6. Start engine and check for additional codes.
7. If any new codes are retrieved, repeat step 7 of inspection procedure (above). If the same code(s) recurs, recheck repair work and look for what else might cause the code(s).