R32 4Motion V6-3.2L (CBRA) (2008)
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Using a multimeter, check the Mass Air Flow (MAF) Sensor G70 electrical harness connector terminal 2 to engine Ground (GND).
Specified value: battery voltage.
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Switch the ignition off.
If specified value was not obtained:
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Check the Mass Air Flow (MAF) Sensor G70 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power
Supply Relay J271 terminal 2/87 for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
If no malfunction is found in the wiring and the voltage supply OK:
Checking electrical circuit
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) J623.
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Using a multimeter, check the Mass Air Flow (MAF) Sensor G70 electrical harness connector terminals to the Engine Control Module (ECM)
J623 electrical harness connector T121 terminals for resistance.
Mass Air Flow (MAF) Sensor
Engine Control Module (ECM)
G70 electrical harness
J623 electrical connector T121
connector terminals
terminals or test box socket
1
26
3
27
4
53
5
29
Specified value: 1.5 ohms max.
If the specification was not obtained:
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Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.