Test Step 5 - Check The (C800) 5 Volt Supply Circuit For An Open

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Fig 1: Checking (C800) 5 Volt Supply Circuit For An Open

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Measure the resistance of the (C800) 5 Volt Supply circuit between A/C Heater Control C2 harness connector and the Rear A/C Heater Control C1 harness connector.

Is the resistance below 1.0 Ohm?

Yes

Go to TEST STEP 8 - CHECK THE HVAC CONTROL MODULES

Repair the (C800) 5 Volt Supply circuit for an open or high resistance.
Perform the HVAC Verification Test. Refer to HVAC .