Preliminary Check

WARNING: This page is about a different car, the 2014 Volkswagen Passat, 2013 Volkswagen Passat, and 2012 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.

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

-- 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 .