Checking Component and wiring

-- Disconnect the MAF / IAT sensor -G70 / G42- electrical harness connector.

-- Using a multimeter, connect the positive lead to the MAF / IAT sensor -G70 / G42- harness connector terminal 2 and the negative lead to an engine ground.

Specified value: Near 5 V

If the specified value was Not obtained:

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

-- Check the 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) -J220-. 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 MAF / IAT sensor -G70 / 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 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 MAF / IAT sensor -G70 / G42-.