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Terminal Assignment of Engine Control Unit, 55 -
pin
Ter. 1 Knock sensor P 46 / Ter. 1
Ter. 2 Crankshaft pulse pick - up / camshaft
sensor, ground Ter. 3, P 35 / P 47
Ter. 3 Crankshaft pulse pick - up (oscillator signal)
P 35 / Ter. 2
Ter. 4 Camshaft sensor (oscillator signal)
P 47 / Ter. 2
Ter. 5 Signal lead, coolant temperature sensor
P 30 / Ter. 1
Ter. 6 Signal lead, intake air temperature sensor
P 29 / Ter. 1
Ter. 7 Sensor supply of oxygen sensor P 32 /
Ter. 2
Ter. 8 Ground connection from hot film mass air flow meter
P 44 / Ter, 4
Ter. 9 Ground 1
Ter. 10 AT ignition retard load reduction signal from
control unit AR 25 / 35
Ter. 11 Load signal to AT control unit AR 25 / 35
Ter. 12 from compressor pressure switch
Ter. 13 Blink code excitation lead from Ter. 6 in
diagnostic plug
Ter. 14 Fuel consumption signal for board computer
Ter. 15 Ground switch lead for fuel pump relay
K 44 /Ter. 85
Ter. 16 Ground switch lead for reverse battery protection
relay K 42 / Ter. 85
Ter. 17 Ground pulse, controlled canister purge valve
Y 34
Ter.18 Voltage supply (permanent positive for memory) from
Ter. 30
Ter. 19 Ground, electronics
Ter. 20 Knock sensor P 46 / Ter. 2
Ter. 21 Measured signal from crankshaft pulse pick - up
P 35 / Ter. 1
Ter. 22 Measured signal from camshaft sensor
P 47 / Ter. 1
Ter. 23 Unoccupied
Ter. 24 Ground 2
Ter. 25 Sensor signal, oxygen sensor P 32 / Ter. 4
Ter. 26 Measured signal, throttle valve potentiometer
P 34 / Ter. 3
Ter. 27 Sensor signal, hot film mass air flow meter
P 44 / Ter. 2
Ter. 28 Unoccupied
Ter. 29 Speed signal from odometer frequency sensor
Ter. 30 Signal, actual AT driving stage from selector lever
Ter. 31 from AC readiness ("ON / OFF"
switch)
Ter. 32 Engine speed signal for tachometer
Ter. 33 Temperature switch, engine compartment relay frame
Ter. 34 Voltage supply for throttle valve potentiometer
P 34 / Ter. 2
Ter. 35 Ground switch lead for engine telltale (diagnosis
lamp)
Ter. 36 Ground switch lead for oxygen sensor heating
P 32/ Ter. 1
Ter. 37 Voltage supply of control unit from reverse battery
protection relay K 42 / Ter. 87
Ter. 38 Ground pulse for DIS ignition module cyl. 3 /
2 L 2 / Ter. 2
Ter. 39 Programming voltage (unoccupied in vehicle)
Ter. 40 Ground pulse for DIS ignition module cyl. 1 /
4 L 2 / Ter. 1
Ter. 41 Ground 3
Ter. 42 Ground pulse of solenoid valve, exhaust gas
recirculation Y 18
Ter. 43 Unoccupied
Ter. 44 Ground switch lead for secondary air pump relay
Ter. 45 Unoccupied
Ter. 46 Idling circuit for idle speed stepper motor
M 33 / Ter. 1
Ter. 47 Voltage supply, control unit K 69 / Ter.
15
Ter. 48 Ground pulse for injector, cyl.
4 Y 7 / Ter. 2
Ter. 49 Ground pulse for injector, cyl.
2 Y 7 / Ter. 2
Ter. 50 Ground pulse for injector, cyl.
1 Y 7 / Ter. 2
Ter. 51 Ground pulse for injector, cyl.
3 Y 7 / Ter. 2
Ter. 52 Ground pulse, idle speed stepper motor
M 33 / Ter. 2
Ter. 53 Ground switch lead for compressor cutoff relay Ter.
85 (AC)
Ter. 54 Unoccupied
Ter. 55 Bidirectional data lead to ALDL diagnostic plug Ter.
7
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