This document provides a wiring diagram for an engine injection computer. It lists 120 electrical components connected to the computer, including injectors, ignition coils, sensors for coolant temperature, air pressure, engine speed, and more. The components are numbered and their wiring thickness and function are described. This computer controls components related to fuel injection, emissions control, and other engine functions.

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ENGINE WIRING
K4J712
120
INJECTION COMPUTER
CA EURO93 CA EURO2000
1 1.0 3CW INJECTOR 2 & 3 IGNITION COIL - CONTROL
3 1.4 M EARTH
4 0.6 3BB CANISTER BLEED SOLENOID VALVE
8 0.35 3JN FAN 1 RELAY - CONTROL
9 0.35 31A COOLANT TEMPERATURE WARNING LIGHT - CONTROL
10 0.35 38K AIR CONDITIONING CUT-OFF CONTROL > PETROL-DIESEL COMPUTER
12 0.6 3BV IDLE SPEED REGULATION CONTROL 2
13 0.6 3C COOLANT TEMPERATURE SENSOR + SIGNAL
15 0.6 3CK UNIT 2 SENSOR -
16 0.6 3F ATMOSPHERIC PRESSURE SENSOR SIGNAL
18 0.6 38X REFRIGERANT GAS PRESSURE SENSOR SIGNAL
20 0.5 3S PINKING SENSOR 1 + SIGNAL > FRONT
24 0.6 3BL ENGINE SPEED > TDC SENSOR - SIGNAL
26 0.35 HL DIAGNOSTIC SIGNAL L
28 1.4 M EARTH
29 0.35 AP15 PROTECTED + AFTER IGNITION ENGINE FUNCTIONS FUSE
30 0.35 BP37 PROTECTED + BATTERY FEED > INJECTOR MEMORY > LOCKING
32 1.0 3CV INJECTOR 1 & 4 IGNITION COIL - CONTROL
33 1.4 M EARTH
38 0.6 3JP FAN 2 RELAY - CONTROL
39 0.35 3GT INJECTION POWER RELAY ACTUATOR CONTROL RELAY
41 0.6 3BU IDLE SPEED REGULATION CONTROL 1
42 0.6 3BW IDLE SPEED REGULATION CONTROL 3
43 0.6 3AJ THROTTLE POSITION POTENTIOMETER + SIGNAL
45 0.6 3GK UPSTREAM OXYGEN SENSOR SIGNAL
46 0.35 38AR AIR CONDITIONING ON>OFF SIGNAL
49 0.6 3B AIR TEMPERATURE SENSOR + SIGNAL
53 0.35 47F VEHICLE SPEED SIGNAL
54 0.6 3BG ENGINE SPEED SIGNAL > TDC SENSOR
56 0.35 HK DIAGNOSTIC SIGNAL K

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58 0.35 H17 PETROL INJECTION > DIESEL > ENGINE IMMOBILISER CODE SIGNAL
59 0.6 3CR INJECTOR 1 - CONTROL
60 0.6 3CT INJECTOR 3 - CONTROL
63 0.6 3GF UPSTREAM OXYGEN SENSOR HEATER - CONTROL
66 0.35 3NR INJECTORS +
68 0.35 3AC FUEL PUMP RELAY COIL - CONTROL
70 0.35 H7
REV COUNTER > TOP DEAD CENTRE > COIL > COMPUTER ALTERNATOR
SIGNAL
72 0.6 3BX IDLE SPEED REGULATION CONTROL 4
73 0.6 3JK COOLANT TEMPERATURE -
74 0.6 3AJA THROTTLE POSITION POTENTIOMETER + SIGNAL
75 0.6 3JL THROTTLE POTENTIOMETER -
77 0.6 3JQ AIR TEMPERATURE -
78 0.6 3D - UNIT 4 SENSOR
79 0.5 3DQ PINKING SENSOR -
80 0.6 3GH UPSTREAM OXYGEN SENSOR EARTH
82 0.6 38U RHEOSTAT CURSOR
83 0.6 38Y REFRIGERANT GAS PRESSURE SENSOR +
85 0.6 3BA POWER STEERING PRESSOSTAT - SIGNAL > INJECTION COMPUTER
89 0.6 3CU INJECTOR 4 - CONTROL
90 0.6 3CS INJECTOR 2 - CONTROL
34 0.6 3FH EMISSION CONTROL FAULT WARNING LIGHT - CONTROL
44 0.6 3GA OXYGEN SENSOR SIGNAL
65 0.6 3GG DOWNSTREAM OXYGEN SENSOR HEATER - CONTROL
76 0.6 3GJ DOWNSTREAM OXYGEN SENSOR EARTH