Preliminary Check

Prior to component diagnosis, a preliminary check must be performed.

Check Technical Service Bulletins for any superseded information.

-- Connect the scan tool.

-- Switch the ignition on.

-- Using the scan tool, check for any stored or related DTCs.

If other DTCs are stored:

-- Repair these DTCs first before performing the following procedure.

If no other DTCs are stored:

-- Using the scan tool, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to attempt to duplicate the customers complaint.

If the DTC returns:

-- Perform the diagnostic procedure.

If the DTC does not return:

-- The fault is intermittent or a sporadic condition may exist.

-- Check the suspected component, electrical harness and electrical harness connectors for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

-- Perform a road test to verify the repair.

If the DTC returns:

-- Perform the diagnostic procedure.

If the DTC does not return:

The fault may have been the result of a loose electrical connection.

-- Generate readiness code. Refer to READINESS CODE .