1215/2215 - Air Mass Meter

DME M3.1:

NOTE: This test should be performed only if MCU code 1215 was retrieved from Digital Motor Electronic (DME) memory.

1. Disconnect the X6206 connector from the air mass meter.
2. Turn the ignition switch to the run position and measure the following voltages at the air mass meter harness connector X6206.

^ Red/white wire (terminal 2) and ground = battery voltage. If not check wire to main relay for an open.
^ Red/white and brown wire (terminal 2 and 4) = battery voltage. If not check wire to ground for an open.

3. With the ignition OFF, measure the resistance between terminals 5 - 6 and 5 - 1 of the air mass meter.

5 - 6 Resistance = approximately 3 - 4 Ohms
5 - 1 Resistance = approximately 16.3 kOhms

4. Reconnect air mass meter connector X6206 and start engine.
5. Using a DIGITAL voltmeter, measure the voltage at terminal 6. As engine load/speed increases, the voltage should increase.

Voltage range = MIN 1.9 - MAX 5.15 VDC.

6. If voltage does not increase with engine load/speed, replace the air mass meter and recheck.
7. Increase engine speed to 2500 RPM for 10 seconds and release the throttle.
8. Turn the engine OFF and check for battery voltage between terminal 1 and ground.

After 4 seconds, voltage should increase for approx. 0.5 seconds..

9. If no voltage is present, check the wire between air mass meter terminal 1 and DME terminal 13. If wire is OK, DME control unit may be defective.