Without Scan Tool

Fig. 1 Malfunction Indicator Light (MIL) or check engine light:

NOTE: This method may only be applicable to systems with a test connector and a Malfunction Indicator Light (MIL) or check engine light.

1. Ground the test connector (1 pin wire) with a jumper wire.
NOTE: The connector is located next to the Self-Diagnostic Connector.
2. Turn the ignition switch to the ON position.
3. If check engine light, Fig. 1, illuminates, goes off, and stays off no codes are present.
4. If check engine light illuminates, goes off, and then starts flashing, codes are present.

Fig. 2 Code Extraction W/O Scanner, Code Cycle.:

5. Count the flashes to determine the fault code Fig. 2.


CODE INTERPRETATION
6. For single digit codes, short quick flashes will be displayed. For example code 8 is 8 quick flashes followed by a pause and either the next code or repeating the previous code.
7. For double digit codes the first digit is a longer flash (more time in between flashes) followed by the second digit, a short quick flash. For example code 24 is 2 long flashes followed by 4 quick flashes and a pause for the next code or repeat of the previous code.
8. After repairs refer to "After Repair Procedures" to clear the memory.