1215 - Air Flow Meter

1. Disconnect the harness connector from the air flow meter.

Engine Management:

2. With the ignition switch in the run position, measure the following voltages at the female connector.

^ Gray/white wire (terminal 1) and ground = Approx. 5 volts
^ Gray/white and gray/blue wire (terminals 1 and 5) = Approx. 5 volts
^ Gray/white and gray/yellow wire (terminals 1 and 2) = Approx. 5 volts

3. If any voltage is incorrect, check and repair associated connections and wires for opens and shorts to voltage and ground. Refer to SCHEMATIC DIAGRAMS.

^ If wires and connections are OK, replace the DME control unit.

4. If all voltages are correct check for continuity between the following terminals at the air flow meter connector (male plug). Measure between pins:

^ 41 and 14 = Continuity
^ 41 and 59 = Continuity

^ If any results are incorrect, replace the air flow meter.
^ If all results are correct, proceed to step 5.

5. Reconnect the harness connector to the air flow meter and remove cover from rear of connector.
6. Measure the voltage between gray/yellow wire (terminal 2) and ground while moving the intake air flap manually.

^ If voltage varies between approximately 0.5 and 4.5 volts, check or repair wire to terminal 41 of DME control unit harness connector for an open circuit. If wire is OK, replace the DME control unit.

^ If the voltage does not vary between 0.5 and 4.5 volts, check or repair wire to terminal 41 of DME control unit harness connector for short to ground. If wiring is OK, repair or replace the air flow meter.