[Erich]

Reparaturbuch, Seiten 170-4 und -5:

Temperature gauge senders location:

M30 in thermostat housing
M60 in coolant crosspipe at rear of engine
M70 in coolant prosspipe at rear of engine

M30 und M70: 1. temperature gauge sender
2. engine coolant temperature (ECT) sensor (DME)
3. EML coolant temperature sensor

M60: 1 und 2

cable colours:


engine/year ------------ gauge sender--------------ECT sensor (DME)------------------EML temperature sensor

M30
1988-1992
(DME 1.3)-----------------brown/violet- -------------brown/red- ------------------------ brown/red-
-----------------------------brown/yellow ------------brown/orange--------------------- brown/violet


M60
1993-1994----------------brown/violet- --------------yellow/green............................-------
(DME 3.3)------------------brown/yellow-------------- brown/orange


M70
1988-1990----------------brown/white-_- ------------brown/red/yellow- ..---------------brown/red-
(DME 1.2)------------------brown/yellow---------------brown/red-brown-------------------blue/violet

1991-1992----------------brown/violet-_--------------brown/red/yellow- _----------------brown/red-
(DME 1.7)------------------brown/yellow---------------brown/red-brown-------------------blue/violet

1993-1994----------------brown/violet-_--------------brown/red/yellow-_-----------------brown/red-
(DME 1.7)------------------brown/yellow---------------brown/red-brown--------------------white/brown

A quick test at the coolant temperature gauge sender can determine if the gauge is functioning correctly.

On M60 and M70 engine, remove coolant expansion tank to access coolant crosspipe at back of cylinder heads.
Detach hoses and harness connectors (from the expansion tank)
Remove reservoir mounting screws.


If gauge needle remains at the rest position with engine warm, detach connector from sending unit and jumper two terminals in connector to simulate a high engine temperature.

Turn ignition on. If gauge needle moves upwards, sending unit is faulty.

If gauge does not respond, wiring to gauge is broken (open circuit) or gauge itself is faulty.

If gauge needle reads too high when engine is cold, detach connector from sender.

Turn ignition on. If gauge needle does not change, wiring or gauge is shorted to ground.
If gauge needle drops, sender is faulty and should be replaced.

Sonst steht da nichts besonderes, ausser die Anzugsdrehmomente.

[Bearbeitet am 7.10.2003 um 20:36 von Erich]