LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2014 >> Tiguan R-Line, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - Generic Scan Tool - Engine Code: CCTA (2 Of 2) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Mass Airflow Sensor -G70-, CHECKING >> Test Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test Procedure

Step Procedure Result / Action to Take
1
  • PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK .
-- Was complaint verified?
  • YES:
  • GO TO Step 2.
  • NO:
  • GATHER more information from customer about the complaint.
2
  • CONNECT: Scan tool.
  • START: Engine and let Idle.
  • CHECK: Air flow quantity at Mass Air Flow sensor.
  • SPECIFIED VALUE: About 2.00 to 5.00 g/s.
  • IGNITION: OFF.
-- Was Value obtained?
  • YES:
  • Fault may be intermittent.
  • Check the harness connector for damage, corrosion, loose or broken terminals.
  • If necessary, repair the faulty wiring connection.
  • GO TO Step 6.
  • NO:
  • GO TO Step 3.
3
  • DISCONNECT: Mass Airflow Sensor -G70- harness connector.
  • IGNITION: ON.
  • CHECK: Mass Airflow Sensor -G70- harness connector terminals 2 to 3 for voltage.
  • SPECIFIED VALUE: Battery voltage.
  • IGNITION: OFF.
-- Was Value obtained?
  • YES:
  • GO TO Step 4.
  • NO:
  • GO TO Step 5.
4
  • REMOVE: Engine Control Module - J623-. Refer to appropriate repair information.
  • CHECK: Mass Airflow Sensor -G70- harness connector terminal 1 to the Engine Control Module - J623- harness connector T94 / 23 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Was value obtained?
  • YES:
  • REPLACE: Mass Airflow Sensor -G70-. Refer to appropriate repair information.
  • GO TO: Step 6.
  • NO:
  • CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals.
  • REPAIR: Faulty wiring or connector.
  • GO TO: Step 6.
5
  • REMOVE: Engine Control Module - J623-. Refer to appropriate repair information.
  • CHECK: Mass Airflow Sensor -G70- harness connector terminal 3 to the Fuse -- terminal. (Refer to the appropriate wiring diagram for fuse location and terminal number) for resistance.
  • CHECK: Mass Airflow Sensor -G70- harness connector terminal 2 to the Engine Control Module - J623- harness connector T94 / 65 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained?
  • YES:
  • REPLACE: Engine Control Module -J623-. Refer to appropriate repair information.
  • GO TO: Step 6.
  • NO:
  • CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals.
  • REPAIR: Faulty wiring or connector.
  • GO TO: Step 6.
6
  • Final Procedure
  • Perform a road test to verify repair.
  • Do any DTC's return:
  • NO:
  • Repair is complete. Generate readiness code. Refer to READINESS CODE .
  • Return vehicle to Customer.
scientia non olet · About LEMON Manuals