Checking Wiring

-- Remove the Engine Control Module (ECM) - J623 -. Refer to appropriate service information.

-- Using a Multimeter, Check the Mass Air Flow (MAF) Sensor -G70- electrical harness connector to the Engine Control Module (ECM) - J623 - electrical harness connector T94 for an open circuit.

Mass Air Flow (MAF) Sensor -G70- electrical harness connector terminals	Engine Control Module (ECM) - J623 - electrical harness connector T94 terminal and Fuse, (Refer to applicable wiring diagram for fuse positions).
4	39
5	Fuse, (Refer to applicable wiring diagram for fuse positions).

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:

-- If no faults were found Replace the Engine Control Module (ECM) - J623 -. Refer to appropriate service information.

-- Go to FINAL PROCEDURES

-- Remove the Engine Control Module (ECM) -J623-. Refer to appropriate service information.

-- Using a Multimeter, Check the Mass Air Flow (MAF) Sensor -G70- electrical harness connector to the Engine Control Module (ECM) -J623- electrical harness connector T94 for an open circuit.

Mass Air Flow (MAF) Sensor -G70- electrical harness connector terminals	Engine Control Module (ECM) -J623- electrical harness connector T94 terminals
1	18
2	23
3	Blank

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery positive or Ground

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

-- If necessary, repair the faulty wiring connection.

-- Go to FINAL PROCEDURES

If the specified value was obtained:

-- Replace the Mass Air Flow (MAF) Sensor -G70-. Refer to appropriate service information.