S14 ECU Pinouts

This information is taken from the S14 factory Service Manual

Pin Connection Pin Connection
1 Spark #1 (to power transistor) 11 Spark #3 (to power transistor)
2 Spark #2 (to power transistor) 12 Spark #4 (to power transistor)
3   13  
4 IACV-AAC Valve Output 14 Auto Trans Interface DT2 (to pin 11)
5 Auto Trans Interface DT1 (to Pin 10) 15 Auto Trans Interface DT3 (to pin 12)
6   16 ECCS Relay Ground
7 Tachometer 17  
8   18 Fuel Pump Relay Ground
9 A/C Cutout Relay Ground 19 Cooling Fan Relay 1 (low speed?)
10 Power Transistor Ground (20, 107, 108, 116) 20 Power Transistor Ground (10, 107, 108, 116)
       
21 CONSULT Data In 31 CONSULT Data Clock
22 CONSULT Data Out 32 Check Engine Lamp
23 Knock Sensor 33 Cooling Fan Relay 2 (high speed?)
24   34 Power Steering Switch
25 Wastegate Solenoid Ground 35 Boost pressure signal
26 MAF Signal 36  
27 MAF Signal 37  
28 Water Temp Sensor 38 TPS Signal
29 Oxygen Sensor Power 39  
30 Boost, TPS, Water Temp  Sensor Ground  40  
       
41 CPS REF Signal (Tied to 51) 51 CPS REF Signal (Tied to 41)
42 CPS POS Signal (Tied to 52) 52 CPS POS Signal (Tied to 42)
43 Start Signal (from Ignition Switch) 53 Speed Sensor
44 Neutral Switch 54 Rear Window Heater Signal (Load)
45 Ignition Switch (ON) 55  
46 Air Conditioning Switch Output 56 TPS Automatic Trans Interface (to pin 34)
47 CONSULT Connector Check In 57  
48 TPS, Boost Pressure Power Supply 58 Permanent power (tied to 109)
49 ECCS Power (tied to 59) from ECCS Relay 59 ECCS Power (tied to 49) from ECCS Relay
50 Ground 60 Ground
       
101 Injector #1 109 Permanent power (tied to 58)
102 EGR control valve 110 Injector #2
103 Injector #3 111  
104   112 Injector #4
105   113 Valve Timing Solenoid Ground
106   114  
107 Power Transistor Ground (10, 20, 108, 116) 115 Oxygen Sensor Signal
108 Power Transistor Ground (10, 20, 107, 116) 116 Power Transistor Ground (10, 20, 107, 108)

If you want the basic ECCS wiring, click here.  Be warned, this is 545KB JPEG file

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