928ecurepair

hello to all...

I have received a broken DME(motronic).. The module is from a 1992 964 C2 ...Now I want to try to repair it.. but I do not have any description of the connector block...(what signal on pin1, pin2, etc)...
Part of the schematic/wiringdiagram would be wonderfull...

Kind regards
928ecurepair

Geoffrey

The information you are looking for is in the Factory service manuals and wiring diagrams. I would start there.

NineMeister

This is what I worked out for our Motec conversion loom, but as Geoffrey says it is all shown on the factory loom diagram:

Pin Description
1 Ignition pulse to output stage
2 Ground - Ign Output stage shield
3 DME Relay ground (fuel pump) must switch to gnd
4 Idle speed control
5 Tank venting valve (switch at 2000 rpm ??)
6 Engine speed to Tacho
7 Signal from AFM
8 Signal from Hall Sensor (flywheel)
9 Unused
10 Ground - Lambda sensor shield
11 Knock sensor 1
12 Power supply to AFM (use for Motec AT Sensor)
13 Diagnostic plug, lead L
14 Ground, linked to Bosch 24
15 ti signal, cylinder 3
16 ti signal, cylinder 6
17 ti signal, cylinder 1
18 Permanent positive
19 Ground - to loom gnd point 3
20 Unused
21 Diagnostic plug, knocking yes + no
22 Check engine control
23 Resonance flap
24 Ground
25 Unused
26 Ground for AFM
27 Unused
28 La sensor signal
29 Knock sensor 2
30 Shield for Knock & Hall sensors, Ground for Knock
31 positive to hall sensor
32 Consumption gauge (fuel used?)
33 ti signal, cylinder 5
34 ti signal, cylinder 4
35 ti signal, cylinder 2
36 Unused
37 Voltage from DME Relay with ignition
38 Unused
39 Version coding
40 Air conditioning compressor clutch
41 AC switch
42 Unused
43 Unused
44 Intake Air Temperature NTC1
45 Engine Temperature NTC2
46 Altitude Potentiometer (BAP sensor)
47 Speed/reference mark positive
48 Speed/reference mark negative shield
49 Unused
50 Heating/air-conditioning regulation
51 Unused
52 Idle signal - throttle valve (use wire for TPS 5v)
53 Full load signal - throttle valve (use for TPS signal input)
54 Coding plug characteristic map
55 Diagnostic plug, lead K

(What did we do before spreadsheets?)

JasonAndreas

#42 Tiptronic starter relay
#49 RS Ground
#51 Tiptronic Ignition Adjust

928ecurepair

Many thanks to all of you....

Kind regards..

KirkF

Technically I believe pin 8 is actually the hall sensor from the distributor not the flywheel.
Pins 47-48 are used for the flywheel reference sensor.


Kirk