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Home >> Volkswagen >> 2009 >> Rabbit 4D Hatchback, 2.5 A, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 2.5L - Generic Scan Tool - Engine Code(S): CBTA & CBUA >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Intake Air Temperature Sensor, Checking >> Checking Component and wiring
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Checking Component and wiring

-- Disconnect the MAP / IAT sensor -G71 / G42- electrical harness connector -1-.

-- Using a multimeter, connect the positive lead to the MAP / IAT sensor -G71 / G42- harness connector terminal 2 and the negative lead to an engine ground.

Specified Value: 4.30 V To 4.90 V 

If the specified value was Not obtained:

-- Check the wiring for an open, high resistance or short to ground.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring or connection.

If voltage was not present and no malfunction is detected in the signal circuit:

-- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to the Repair Information.

If the specified value was obtained:

-- Using a multimeter, connect the positive lead to Battery + and the negative lead to the MAP / IAT sensor -G71 / G42- harness connector terminal 1.

Specified Value: Battery Voltage. 

If the specified value was Not obtained:

-- Check the ground circuit for an open or high resistance.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wire or connection.

If the specified value was obtained:

-- Replace the MAP / IAT sensor -G71 / G42-.

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