Chris H
master of boobies
The 16v Siemens MPI ECU has 35 pins. The pins are numbered. This list is the ECU pins, the wiring pins will obviously be the other way about if your looking from the front of it - if you get my drift.
As per 99.99% of ECU's it switches things to earth.
PIN
1 & 2 - EARTH
3 - VSS SPEED SENSOR INPUT
4 - BATTERY POSITIVE
5 - CHARCOAL CANISTER SOLENOID (OR EVAP PURGE VALVE IF YOU'D RATHER)
6 - FUEL PUMP RELAY (THIS IS A SWITCHED EARTH SO WITH PUMP RUNNING 0V)
7 - ECU power relay SWITCHED EARTH
8 - OIL PRESSURE SWITCH (ONLY SEEMS ACTIVE ON SOME MODELS)
9 - TPS INPUT (0.2V THROTTLE CLOSED 4.7V FULLY OPEN)
10 - COLD START INJECTOR
11 - CRANK POSITION SENSOR
12 - NOT USED
13 - INSTRUMENT PANEL (I THINK THIS IS ONE OF THE ECU LIGHTS, SOME HAVE NOTHING HERE)
14 - INTAKE AIR TEMP SENDER
15 - ENGINE COOLANT TEMP SENDER
16 - MAP AND TPS POSITIVE FEED
17 - MAP AND TPS SWITCHED EARTH
18 - MIL (ECU LIGHT) NOT ON ALL MODELS
NEXT ROW UNDER PINS 1/2
19 - ENGINE CONTROL RELAY POSITIVE FEED
20 - INJECTORS SWITCHED EARTH
21 - INJECTORS SWITCHED EARTH
22 - A/C LOAD SWITCH OR OIL PRESSURE WARNING LAMP
23 - IDLE CONTROL VALVE CONTROL SIGNAL
24 - IDLE CONTROL VALVE CONTROL SIGNAL (DUNNO WHY ITS THERE TWICE)
25 - POWER STEERING PRESSURE SWITCH (NOT APPLICABLE ON ALL MODELS)
26 - INSTRUMENT PANEL CYCLING OUTPUT (DIGI DASH?)
27 - IGNITION AMPLIFIER
28 - CRANKSHAFT SENSOR INPUT SIGNAL
29 - IGNITION SWITCH 9V WHEN CRANKING
30 - AIR CON (WHO ACTUALLY IN THE UK HAS A/C?)
31 - KNOCK SENSOR (INPUT FROM SENSOR)
32 - KNOCK SENSOR, IAT AND ECT SENSOR SWITCHED EARTHS
33 - MAP SENSOR INPUT (2V IDLE 4.8 FULL THROTTLE)
34 - AIRCON (AGAIN)
35 - LAMBDA SENSOR OR CO ADJUSTMENT
As per 99.99% of ECU's it switches things to earth.
PIN
1 & 2 - EARTH
3 - VSS SPEED SENSOR INPUT
4 - BATTERY POSITIVE
5 - CHARCOAL CANISTER SOLENOID (OR EVAP PURGE VALVE IF YOU'D RATHER)
6 - FUEL PUMP RELAY (THIS IS A SWITCHED EARTH SO WITH PUMP RUNNING 0V)
7 - ECU power relay SWITCHED EARTH
8 - OIL PRESSURE SWITCH (ONLY SEEMS ACTIVE ON SOME MODELS)
9 - TPS INPUT (0.2V THROTTLE CLOSED 4.7V FULLY OPEN)
10 - COLD START INJECTOR
11 - CRANK POSITION SENSOR
12 - NOT USED
13 - INSTRUMENT PANEL (I THINK THIS IS ONE OF THE ECU LIGHTS, SOME HAVE NOTHING HERE)
14 - INTAKE AIR TEMP SENDER
15 - ENGINE COOLANT TEMP SENDER
16 - MAP AND TPS POSITIVE FEED
17 - MAP AND TPS SWITCHED EARTH
18 - MIL (ECU LIGHT) NOT ON ALL MODELS
NEXT ROW UNDER PINS 1/2
19 - ENGINE CONTROL RELAY POSITIVE FEED
20 - INJECTORS SWITCHED EARTH
21 - INJECTORS SWITCHED EARTH
22 - A/C LOAD SWITCH OR OIL PRESSURE WARNING LAMP
23 - IDLE CONTROL VALVE CONTROL SIGNAL
24 - IDLE CONTROL VALVE CONTROL SIGNAL (DUNNO WHY ITS THERE TWICE)
25 - POWER STEERING PRESSURE SWITCH (NOT APPLICABLE ON ALL MODELS)
26 - INSTRUMENT PANEL CYCLING OUTPUT (DIGI DASH?)
27 - IGNITION AMPLIFIER
28 - CRANKSHAFT SENSOR INPUT SIGNAL
29 - IGNITION SWITCH 9V WHEN CRANKING
30 - AIR CON (WHO ACTUALLY IN THE UK HAS A/C?)
31 - KNOCK SENSOR (INPUT FROM SENSOR)
32 - KNOCK SENSOR, IAT AND ECT SENSOR SWITCHED EARTHS
33 - MAP SENSOR INPUT (2V IDLE 4.8 FULL THROTTLE)
34 - AIRCON (AGAIN)
35 - LAMBDA SENSOR OR CO ADJUSTMENT
