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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 constantly 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. This procedure is only applicable to vehicles with an MIL system that will display codes.

INSPECTION PROCEDURE

1. Warm up engine to normal operating temperature and turn ignition "OFF."

2. Ground test connector (Green: 1-pin) with a jumper wire.

NOTE: Test connector is located next to self-diagnostic 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 codes are retrieved, refer to Malfunction Code Charts under DIAGNOSTIC CHARTS. Repair as required.

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 the engine and check for additional codes.

7. If any codes are retrieved, repair problem and repeat after-repair procedure.


Check Engine Light (CEL) / Malfuntion Indicator Light (MIL) Code Legend


B2600i Check Engine Light (CEL) Malfunction Engine Light Codes



 
     
CLEARING CODES
1. Disconnect negative battery cable. Depress brake pedal for at least 5 seconds. Reconnect battery cable.

2. Ground test connector with jumper wire. Turn ignition on, but do not start engine for 6 seconds.

3. Start engine and run at 2000 RPM for 2 minutes. Verify no codes are displayed.