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Home >> Volkswagen >> 2012 >> Jetta GLI, 2.0L Eng VIN A, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> 2.0L - Generic Scan Tool - Engine Code: CBFA (Sedan) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> MAF Sensor, Checking >> Checking wiring
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Checking wiring

-- Remove the Engine Control Module -J623-.

-- Using a Multimeter, Check the Mass Airflow Sensor -G70- electrical harness connector to the Fuse for an open circuit, (Refer to applicable wiring diagram for fuse positions).

Mass Airflow Sensor -G70- electrical harness connector terminals: Engine Control Module -J623- electrical harness connector T94 terminal and Fuse, (Refer to applicable wiring diagram for fuse positions).
3 Fuse

Specified value: 1.5 Ω Max.

If the specified value was Not obtained: 

-- Check the wiring connection for an open or short circuit.

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection and replace any open fuses

-- Go to Final procedures

If the specified value was obtained: 



-- Remove the Engine Control Module -J623-.

-- Using a Multimeter, Check the Mass Airflow Sensor -G70- /Intake Air Temperature Sensor -G42- electrical harness connector to the Engine Control Module -J623- electrical harness connector for an open circuit.

Mass Airflow Sensor -G70- /Intake Air Temperature Sensor -G42- electrical harness connector terminals Engine Control Module -J623- electrical harness connector T94 terminals:
1 23
2 55

Specified value: 1.5 Ω Max.

If the specified value was Not obtained: 

-- Check the wiring connection for an open circuit or short circuit.

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

-- If no faults were found, Replace the Engine Control Module -J623-.

-- Go to Final procedures

If the specified value was obtained: 

-- Replace the Mass Airflow Sensor -G70- /Intake Air Temperature Sensor -G42-.

Final procedures 

After the repair work, the following work steps must be performed in the following sequence:

  1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
  2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
  3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .