For 1990-2009 cars

Before using this section, perform the Powertrain On-Board Diagnostic (OBD) System Check and verify all of the following items:

• | The PCM and MIL (Service Engine Soon) are operating correctly.

• | There are no DTC(s) stored.

• | Scan tool data is within normal operating range, Refer to Engine Scan Tool Data List .

• | Verify the customer complaint and locate the correct symptom in the table of contents. Perform the procedure included in the symptom chart.