Without Scan Tool

Data Link Connector (DLC):

1. Ground Data Link Connector terminal # 1.
2. Set the ignition switch to "ON", the Malfunction Indicator (check engine) Lamp will illuminate for a particular duration and a certain number of times.

EXAMPLES:

No Codes--normal
- The Lamp will illuminate for 0.5 seconds, then stay Off for 0.5 seconds, this pattern will repeat until the ignition is turned OFF.

Code 13
- The Lamp will illuminate one time for approximately 0.5 second. This will represent one unit of ten. There will be approximately a one second delay and then the Lamp will illuminate three times for approximately 0.2 seconds with 0.2 second delay between deflections. This will represent three units of one.

Code 23
- The Lamp will illuminate two times for approximately 0.5 second with approximately 0.3 second delay between deflections. This will represent two units of ten. There will be approximately a one second delay and then the Lamp will illuminate three times for approximately 0.2 seconds with 0.2 second delay between deflections. This will represent three units of one.

3. Refer to the Trouble Code to Fault Message Conversion Chart to determine which circuit is outside of the acceptable parameters.
4. Test and repair the cause as necessary.
5. Clear the trouble codes by disconnecting the vehicle battery negative terminal for 16 seconds or longer.
6. Road test the vehicle and check for new codes that may have been set.