Without Scan Tool

Test Connector:

When trouble occurs in the main input or output devices, test the system to find the cause. During testing, failures of input and output devices are retrieved from the control unit as malfunction code numbers.

NOTE: The control unit constantly checks for malfunction of the input devices. But, it only checks for malfunction of output devices in a 3 second period after the ignition switch is turned on with the test connector grounded. If there is more than one failure code present, the lowest number malfunction code is displayed first, then the subsequent malfunction codes light up in order.

NOTE: This method may only be applicable to systems with a test connector and a Malfunction Indicator (CHECK) Light.

INSPECTION PROCEDURE

1. Warm up the engine to normal operating temperature and then turn it off.
2. Ground the test connector (Green: 1-pin) with a jumper wire.

NOTE: The connector is located next to the Self-Diagnostic Connector.

3. Turn the ignition switch to the ON position.
4. If the check engine light illuminates, goes off, and stays off no codes are present.
5. If the check engine light illuminates, goes off, and then starts flashing, codes are present.
6. Start the engine and check for additional codes.
7. If any codes are retrieved, repair the cause of the problem.

AFTER REPAIR PROCEDURE

1. Erase the malfunction codes from memory by disconnecting the negative battery cable and depressing the brake pedal for at least five seconds. Reconnect the battery cable.
2. Ensure that the engine is at normal operating temperature, then ground the test connector.
3. Turn the ignition switch to the ON position.
4. If the check engine light illuminates, goes off, and stays off no codes are present.
5. If the check engine light illuminates, goes off, and then starts flashing, codes are present.
6. Start the engine and check for additional codes.
7. If any codes are retrieved, repair the cause of the problem, then perform after repair procedures again.