Nissan 200SX S13 CA18DET ECU Pinouts

The following diagram and pinout reference should help you work out what does what. Handy if your making a field harness or installing a programmable ECU. I’ve numbered and colour coded the pins in figure 1 for easy matching against the pinout table below.

Figure 1:

CA18DET ECU Pinout reference diagram

Pinout Table

Pin Wire Description Related Pins
101 W/B Fuel Injector #1 Drive Input ?
102 ? ? ?
103 G/B Fuel Injector #3 Drive Input ?
104 SB Auxiliary Air Control Valve ?
105 ? ? ?
106 ? ? ?
107 B Injector Ground 10, 20, 108, 116
108 B Injector Ground 10, 20, 107, 116
109 B/W ECU Power 49, 59
110 Y/B Fuel Injector #2 Drive Input ?
111 PU Pressure Regulator Control Solenoid Valve ?
112 L/B Fuel Injector #4 Drive Input ?
113 ? ? ?
114 ? ? ?
115 L Exhaust Gas Sensor (Oxygen Sensor) ?
116 B Injector Ground 10, 20, 107, 108
1 R/W Power Transistor Coil Pack #1 ?
2 R/Y Power Transistor Coil Pack #2 ?
3 R/G Power Transistor Coil Pack #3 ?
4 ? ? ?
5 L/G Boost Pressure Control Solenoid ?
6 G/Y A/C Relay ?
7 Y/R Tachometer Signal Output ?
8 Gy Variable Intake Butterfly Control Solenoid ?
9 ? ? ?
10 B Engine Ground 20, 107, 108, 116
11 R/L Power Transistor Coil Pack #4 ?
12 ? ? ?
13 ? ? ?
14 ? ? ?
15 ? ? ?
16 R/B ECU Relay ?
17 Gy/R Injector Pulse Duty Output (Trip Computer For Fuel Usage Meas.) ?
18 B/P Fuel Pump Relay ?
19 ? ? ?
20 B Engine Ground 10, 107, 108, 116
21 ? ? ?
22 ? ? ?
23 W Detonation Knock Sensor ?
24 ? ? ?
25 ? ? ?
26 B Air Flow Meter Ground ?
27 G/B Air Flow Meter ?
28 L/O Engine Coolant Temperature Sensor Input ?
29 W Exhaust Gas Sensor (Oxygen Sensor) ?
30 B Engine Ground ?
31 ? ? ?
32 R Check Engine Light (MIL) Check Connector ?
33 G Check Connector ?
34 ? ? ?
35 ? ? ?
36 ? ? ?
37 G/Y Air Flow Meter ?
38 Lg/B Throttle Position Sensor ?
39 ? ? ?
40 ? ? ?
41 G/Y Crank Angle Sensor 51
42 G/B Crank Angle (Sensor 1 Degree Signal) 52
43 O Start Signal ?
44 G/O Neutral Position Switch ?
45 B/R Ignition Switch ?
46 L/G A/C ON Switch ?
47 GY/L Check Connector ?
48 Lg/R Throttle Position Sensor Power Output ?
49 B/W ECU Power 59, 109
50 B ECU Ground 60
51 G/Y Crank Angle Sensor 180 Degree Input 41
52 G/B Crank Angle (Sensor 1 Degree Input) 42
53 Y/G Vehicle Speed Sensor ?
54 Y/W Automatic Control Unit TPS, Throttle Idle Position ?
55 L/W Ambient Air Temp Sensor Input ?
56 W/L Automatic Control Unit ?
57 Y Idle Switch, TPS Switch, Full Throttle Position ?
58 R Dropping Resistor/ Power Transistor ?
59 B/W ECU Power 49, 109
60 B ECU Ground 50

Links

Acknowledgements

The source for this information came from a spreadsheet I came across a while ago and has been checked against an Autodata Nissan workshop supplement. The author of the original spreadsheet is unknown.

One thought on “Nissan 200SX S13 CA18DET ECU Pinouts”

  1. Awesome link. I’ve been looking for a pin out for my Nissan and finally found it. She has been parked for awhile and thanks to the rats the entire wiring is a mess. This link just saved me an awful lot of trouble thanks for that. I’ve cross checked the diagram above to the ECU on my car and its the correct pin-out

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