ECM Component Layout

Motronic Engine Control Module (ECM), Component Layout







1 - Motronic Engine Control Module (ECM) harness connector
- before removing; ignition must have been switched oft for a minimum of 20 seconds
- 68 pin

2 - Motronic Engine Control
Module (ECM) (J 220)
- installation location: driver side of plenum panel in engine compartment
- with DTC Memory.
- Idle speed and ignition timing point.

3 - Engine Control Module (ECM) mounting plate

4 - Oxygen sensor (O2S) (G 39)
- 50 Nm (37 ft lb)
- installation location: front exhaust pipe
- coat threads with G5 but do not allow G5 to enter slotted area of sensor tip.


To check heater voltage supply:

- switch Fluke 83 multimeter to 20 Volt range connect multimeter between terminals 1 (red/white) and 2 (brown)
- start engine and let idle
- must be approx. battery voltage

5 - Engine coolant temperature (ECT) sensor (G 62)
- blue
- 2 pin

6 - Retaining clip
- check for secure fit

7 - O-ring

8 - Harness connector for blue Engine Coolant Temperature (ECT) sensor

9 - Engine speed (RPM) sensor (G 28)


10 - Spacer

11 - Harness connector for Oxygen sensor (O2S)
- 4 pin
- for O2S and O2S heater
- fastened to rear engine mount facing front of vehicle