Short circuit to B+
1 Check relay.
1. Remove relay.
2. Connect ohmmeter to terminals 85 and 86.
Display: approx. 75 ohms
2 Check wiring from DME control module to relay for continuity.
1. Connect special tool 9637 to wiring harness
(DME control module connector).
2. Remove relay.
3. Connect ohmmeter to special tool 9637, pin II/20, and relay slot, pin 2 (terminal 85).
Display: 0 - 5 ohms
If infinity ohms is displayed, check wiring harness for chafing and pinching damage.
3 Perform adaptation.
1. Switch on the ignition.
2. Wait one minute.
Do not press the accelerator.
3. Switch off the ignition for at least 10 seconds.
4. Read out the fault memory.
4 Check wiring from DME control module to relay for short circuit to ground.
1. Connect special tool 9637 to wiring harness (DME control module connector).