Nissan ECR 33 RB25DET Computer pinout
Plug as viewed from edge of computer Pin 1 2 3 4 5 6 7 8 9 10 21 22 23 24 25 26 27 28 29 30 41 42 43 44 45 46 47 48 49 50 101 102 103 104 105 106 107 108
Description Cyl No1 Spark Cyl No5 Spark Cyl No3 Spark AAC Valve Signal to Automatic Transmission Nc Tachometer out Nc Signal From Air Conditioning Ignition Ground Diagnostics Receive Data Diagnostics Send Data Knock Sensor Cyl 1-3 Knock Sensor Cyl 4-6 Boost control Valve Air Flow Meter Ground Air Flow Meter Sense Engine Temperature Sensor Oxygen Sensor Sensor Ground Crank Angle Sensor 120° Input Crank Angle Sensor 1° Input Start Switch Transmission Neutral Switch? Ignition Switch (also on Diagnostic) Signal From Air Conditioning Check Signal On Diagnostic Throttle Position Sensor +12 V switched through ECCS Relay Ground Cyl No 1 Injector Ground Nc Cyl No 3 Injector Ground ? Cyl No 2 Injector Ground Nc Ground Ground
Pin 11 12 13 14 15 16 17 18 19 20 31 32 33 34 35 36 37 38 39 40 51 52 53 54 55 56 57 58 59 60 109 110 111 112 113 114 115 116
Description Cyl No6 Spark Cyl No2 Spark Cyl No4 Spark Signal to Automatic Transmission Signal to Automatic Transmission ECCS Relay Coil ground Nc Fuel Pump Relay Power Steering Idle Up (Switched to gnd) Ignition Ground Diagnostics Clock Check Engine light Exhuast Temperature Light Nc Nc Nc Nc Throttle Position Sensor Sense Nc Nc Crank Angle Sensor 120° Input Crank Angle Sensor 1° Input Hicas Diagnostic wire/speed limiter Nc Nc Goes to AT/ABS/LSD Control units? Goes to ABS/LSD Control units? Unswitched 12V (backup) +12 V switched through ECCS Relay Ground +12 V switched through ECCS Relay Cyl No 5 Injector Ground Nc Cyl No 6 Injector Ground Variable Timing Control Solonoid Ground Cyl No 4 Injector Ground Oxygen Sensor Heater Ground
NOTE: This pinout is as figured out by me, and could have mistakes, therefore I accept no responsibility for any damage caused by incorrect information given herein. USE AT YOUR OWN RISK, and in conjunction with other circuit diagrams. The greyed out connections are ones that I have not connected up. Please forward any corrections, suggestions, additions or questions to
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