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-.