Nissan Engines SR20DET reference and basic servicing The "BIG" turbos Basics of turbochargers 300zx brake upgrade
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
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SR20DET technical info
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.
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
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SR20DET technical info
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
Diagrams of wiring including ECCS, POWER/AUDIO and MAIN WIRING ECCS wiring Power/Audio wiring Main wiring
SR20DE vs. SR20DET (Remember 'T' is for Turbo) Here are the differences between the DET and the DE: The DET has oil squirter piston coolers The DET has a bigger oil pump. The DET has a different front pulley. file:///C|/Documents%20and%20Settings/Owner/Desktop/SR20DET%20technical%20info.htm (3 of 5)9/22/2004 5:57:36 PM
SR20DET technical info
The DET has lower compression pistons (8.3:1 vs 9.5:1). The DET has bigger injectors. The DET has direct ignition. The DET has a variable intake cam, runs retarded at idle, advanced mid range and retarded top end. The DET has mechanical shim in bucket type lifters with a slightly bigger in duration exhaust cam. The GTi-R DET has individual Throttle body injection. The GTi-R DET has stronger main cap bolts. The GTi-R DET has beefier rods. *Just about all parts between the SR20DET and the SR20DE are interchangeable. Comes in very handy!
Parts in the U.S. that fit the SR20DET Part description - Car Year - Car Model STOCK Nissan clutch - 89 - Nissan Maxima 240mm 9-7/16" spline 24x1 Ignitor Chip - 92+ - Infiniti Q-45 Throttle Body - 91-98 - Nissan 240SX DOHC
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