Without Scan Tool

Diagnosis Connector:

When problems occur in ECU monitored input or output devices, the dash mounted malfunction indicator lamp (MIL) will light ("CHECK"), and stay "ON" while faults are present and the engine is running. Codes are stored in the computer memory that identify the faulty circuit or component. The following describes the procedure for displaying codes stored in the self diagnostic memory.

During this test procedure, the ECU will display input and output device failure codes by flashing the MIL lamp on the instrument panel.

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

MALFUNCTION CODE EXPLANATION

Fig. 158 Code Chart:

INSPECTION PROCEDURE

1. Warm engine to operating temperature. Switch ignition "OFF."
2. Connect jumper wire between diagnosis connector "TEN" and "GND" terminals.
3. Switch ignition "ON."
4. If codes are present, the MIL will light in patterns illustrated on the MALFUNCTION CODE CHART.
5. When all codes have displayed, the sequence will repeat until the jumper wire is removed.
6. Record codes and repair as necessary.
7. Following repairs, perform after-repair procedure.

AFTER-REPAIR PROCEDURE

CAUTION: Obtain code number and deactivate audio anti-theft system before disconnecting battery.

1. To erase codes from ECU memory, disconnect negative battery cable and depress brake pedal for at least five seconds. Reconnect battery cable.
2. Switch ignition "ON" but do not start engine for six seconds.
3. Start and warm up engine, then run at 2000 rpm for three minutes. Install jumper wire between diagnosis connector "TEN" and "GND" terminals.
4. Ensure that the MIL no longer flashes malfunction codes.