DME System 1 (Code 1215)

NOTE: This test should be performed only if MCU 1 code 1215 was retrieved from DME memory.

Engine Management: Motronic Control Unit 1 (DME/EML 1.7):

1. Disconnect the 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 X6216.

^ Red/blue wire (terminal 2) and ground = battery voltage. If not check wire to main relay for an open.
^ Red/blue and brown wire (terminal 2 and 4) = battery voltage. If not check wire to ground for an open.
^ Gray/violet/yellow and gray/blue/yellow (terminal 3 and 6) = approx. 5 volts. If not check wire to terminal 41 of DME control unit connector for an open.
^ If all voltages are OK, proceed with step 3.

3. Switch the ignition OFF and disconnect the DME control unit connector.
4. Turn the ignition switch to the run position and measure the voltages at the air mass meter harness connector.

^ Gray/blue/yellow wire (terminal 6) and ground = 0 volts. If not check wire for a short to voltage.

Relay Locations:

5. Remove the cover from the relay box on the right side of the engine compartment.

^ Gray/blue/yellow wire (terminal 6) and X6400 battery post = 0 volts. If not check wire for a short to ground.
^ If all voltages are OK and MCU 1 code 1215 is stored in DME memory, the air mass meter is defective.

6. Switch off the ignition and reconnect the DME control unit harness connector X6010.
7. Turn the ignition switch to the run position, and measure the voltage at the air mass meter harness connector X6216.

^ Gray/violet/yellow wire (terminal 3) and ground = approx. 5 volts. If not check wire 76 of DME control unit for an open or a short to ground.
^ If wire is OK, the DME control unit 1 is defective.

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

8. Turn the ignition switch OFF and measure voltage at the air mass meter harness connector X6216.

^ Gray/violet/yellow wire (terminal 3) and ground = 0 volts. If not check wire to terminal 76 of DME control unit for a short to voltage