Postby weed00020 » November 12th, 2005, 2:43 pm
SR20DET wiring ECU pins and description of wire colors
1 - Coil Pack 1 Output (Via power transistor Unit) - Red White
2 - Coil Pack 2 Output (Via power transistor Unit) - Red Yellow
3 - Tachometer signal output - Yellow Red
4 - ECCS Relay - Red Black
5 - Ignition Pulse Monitor (For Trip Comp ?)
6 - Ignition Signal Ground - Black
7 - RX data (Signal from Nissan Consult hand terminal) - Green Black
8 - Coil Pack 3 Output (Via power transistor Unit) - Red White
9 - Coil Pack 4 Output (Via power transistor Unit) - Red White
10 -
11 -
12 - A/T signal DT3 (autotrans gear select ?)
13 - Ignition Signal Ground - Black
14 - CLK clock (timing signal) - Green White
15 - TX data (signal to Nissan Consult hand terminal) - Green
16 - MAFS signal input ( Mass Air Flow Sensor ) - White
17 - MAFS ground - Black
18 - Water Temp Sensor input - Blue Brown
19 - Oxyen Sensor input (O2) - White
20 - TPS input (throttle postion sensor) - White
21 - Sensor ground - Black
22 - CAS 180deg signal (Crank angle sensor) - White
23 - CHK check (check start) ? - Green Red
24 - Monitor check Lamp (red) (fault code lamp output)
25 - Exhaust over temp warning lamp output - Orange
26 - Exhaust temp sensor inout (Behind the Cat) - Blue Yellow
27 - Detonation sensorinput (knock sensor) - White
28 - TPS for A/T (kick down switch)
29 - Sensor ground - Black
30 - CAS 180deg signal (crank angle sensor) - White
31 - CAS 1deg signal (crank angle sensor) - Black
32 - Speed sensor input - Yellow Green
33 -
34 - Start signal (from ignition switch) - Orange
35 - A/T neutral switch input - Green Orange
36 - IGN (ignition ON, from ignition switch) - Black Red
37 - TPS power output (power to throttle position sensor) - Light Green Red
38 - ECCS power - Black White
39 - ECCS ground - Black
40 - CAS 1 deg signal (crank angle sensor) - Red Black
41 - A/C on input (Air Con ON from A/C panel) - Blue Green
42 - A/T signal DT1 (auto trans gear select ?)
43 - Power steering switch (speed proportional control output) - Purple White
44 - A/T signal DT1 (auto trans gear select ?)
45 - Ambient air tamp sensor input - Blue White
46 - ECCS backup power - Red
47 - ECCS power - Black White
48 - ECCS ground - Black
101 - Injector No. 1 drive output - White Black
102 - EAI control solenoid output (egr valve control ?) - Orange Black
103 - Injector No.3 drive output - Green Black
104 - Fuel pump relay output - Black Purple
105 - Fuel pressure control module - Red White
106 - A/C on output (Air conditioner on relay signal) - Green Black
107 - Injector ground - Black
108 - Injector ground - Black
109 - Reverse electrical flow return circuit (alternator fail input) - Red
110 - Injector No. 2 drive output - Yellow Black
111 - Turbo boost pressure control solenoid (over boost cut ?) - Orange Black
112 - Injector No. 4 drive output - Blue Black
113 - AAC valve control (Auxiliary Air Control, Idle speed control) - Light Blue
114 -
115 -
116 - Injector ground - Black
*If you cant make out the diagram email me and I will send you a better picture.
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ECU fault codes
Long Flash - 0.6 seconds on (the first digit)
Short Flash - 0.3 seconds on (the second digit)
Long Gap - 2.1 seconds off (used between codes)
Short Gap - 0.9 seconds off (used between digits)
There are two digits in each code. Count the long flashes, then the short flashes (only count how many times the light is ON) and you'll have a 2 digit code. These codes are covered in the service manual.
Code Meaning
11 - Camshaft Position Sensor
12 - Air Flow Meter
13 - Coolant Temperature Sensor
14 - Vehicle Speed Sensor
21 - Ignition Signal
25 - IACV - AAC Valve
26 - Boost Pressure Sensor
31 - ECM Fault
32 - Exhaust Gas Recirculation System
33 - Front EGO Sensor (O2-1 Sensor)
34 - Knock Sensor
35 - EGR Temperature Sensor
36 - EGR BPT Valve
37 - Closed Loop System
41 - Intake Air Temperature Sensor
43 - Throttle Position Sensor
54 - Signal from Auto Transmission
55 - Other Malfunction. CONSULT Terminal Required
63 - Cylinder 6 Misfire (?)
64 - Cylinder 5 Misfire (?)
65 - Cylinder 4 Misfire
66 - Cylinder 3 Misfire
67 - Cylinder 2 Misfire
68 - Cylinder 1 Misfire
71 - Random Misfire
72 - TW Catalyst System
76 - Fuel Injection System
77 - Rear EGO Sensor (O2-2)
82 - Crank Position Sensor
84 - Automatic Transmission Diagnostic Comms Line
95 - Crank Position Cog
98 - Coolant Temperature Sensor
103 - Park/Neutral Switch
105 - EGR Solenoid
111 - Inhibitor Switch
112 - Automatic Transmission Speed Sensor
113 - Automatic Transmission 1st Signal
114 - Automatic Transmission 2nd Signal
115 - Automatic Transmission 3rd Signal
116 - Automatic Transmission 4th Signal
118 - Automatic Transmission Shift Solenoid Valve A
121 - Automatic Transmission Shift Solenoid Valve B
123 - Automatic Transmission Overrun Clutch Solenoid Valve
124 - Automatic Transmission TOR Conv Solenoid Valve
125 - Automatic Transmission Line Pressure Solenoid
126 - Automatic Transmission Throttle Position Sensor
127 - Automatic Transmission Engine Speed Signal
128 - Automatic Transmission Fluid Temperature Sensor
SR20DET ECU
E5 is from a 94-96 180sx black top 5 speed
E6 is from a 94-96 180sx blacktop automatic
WC is from a 94-98 S14 Silvia
62 is from a 91-93 180sx or S13 Silvia 5 speed
61,63 is from a 91-93 180sx or S13 Silvia automatic
J4 is from a 97-98 180sx Type X 5speed
