FAQ – 1g and 2g DSM ECU Pinouts

FAQ – 1g and 2g DSM ECU Pinouts

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We’re asked on a regular basis on what pin and wire is what, what color wire does this do and where do I need to tap for such and such. As part of an emerging category of Pro Street FAQ, we’re compiling DSM ECU Pinouts and PCM pinouts for the many popular sport compact and muscle cars out there.

We begin with the DSM ECU Pinouts from 1989-1999 these 4 cylinder turbocharged powerplants were a very easy and powerful way to roam the streets. Equipped with the legendary 4G63, 300 hp was just a few mods away for many enthusiasts and drivers.

1989-1994 Mitsubishi Eclipse, Eagle Talon and Plymouth Laser DSM ECU Pinouts

ecu-harness-1G

 

Pin Connection Pin Connection
101 Ground 106 Ground
102 Power supply 107 Power supply (to MPI Control Relay and ??)
103 Battery backup power supply (constant 12V) 108 Ignition switch – ST
104 Neutral safety switch (AT only, grounded in MTs) 109 Ignition pulse detect (tach)
105 Wastegate solenoid valve 110 Ignition switch – 1G
Pin Connection Pin Connection
51 No. 1 Injector 60 No. 3 Injector
52 No. 2 Injector 61 No. 4 Injector
53 EGR Control Solenoid Valve (90-93 CA only, 94 all) 62 Purge control solenoid valve
54 Power transistor for #1 and #4 coils 63 MPI Control relay
55 Power transistor for #2 and #3 coils 64 Check engine light
56 MPI Control relay 65 Air conditioner relay
57 Fuel pressure control valve 66 MPI Control relay
58 Coil “A1” for idle speed control motor 67 Coil “B1” for idle speed control motor
59 Coil “A2” for idle speed control motor 68 Coil “B2” for idle speed control motor
Pin Connection Pin Connection
1 Self-Diagnosis Output 13 Control relay (Fuel pump drive signal)
2 Diagnosis/Data transfer select terminal 14 Air flow sensor active filter reset (idle switch)
(switch with 6 if using a 91-94 ECU in a 90 or vvs)
Stock wire color – Green
3 Turbo gauge 15 EGR temperature sensor (90-93 CA only, 94 all)
4 Oxygen Sensor 16 Barometric pressure sensor (MAF)
5 Power steering oil pressure switch 17 Sensors ground
6 Idle position switch
(switch with 14 if using a 91-94 ECU in a 90 or vvs)
Stock wire color – Green/White
18 Vehicle speed sensor (reed switch)
7 Air conditioner switch 19 Throttle position sensor
8 Intake air temperature sensor (MAF) 20 Coolant temperature sensor
9 Detonation sensor 21 Crank angle sensor (RPM)
10 Air flow Sensor (MAF) 22 Top dead center sensor
11 ABS control unit (AWD, ABS only) 23 Power supply for MAF sensors (5volts)
12 Ignition timing adjustment connector 24 Sensors ground

1995-1999 Mitsubishi Eclipse and Eagle Talon Turbo DSM ECU Pinouts

verticalecupinout

 

Pin Connection Pin Connection
1 No. 1 Injector 14 No. 2 Injector
2 No. 3 Injector 15 No. 4 Injector
3 Fuel pressure solenoid 16 Boost meter
4 Idle Speed Control (ISC) motor coil (A1) 17 ISC motor coil (A2)
5 ISC motor coil (B1) 18 ISC motor coil (B2)
6 EGR Solenoid 19 Volume air flow sensor reset signal
7 Engine/transaxle general control torque reduction request signal 1 20 Cooling fan motor relay (high)
8 Fuel pump relay 21 Cooling fan motor relay (low)
9 Evaporate emission purge solenoid 22 AC compressor clutch relay
10 Ignition power transistor (A – to coil for cyl 1&4) 23 Ignition power transistor (B – to coil for cyl 2&3)
11 Turbo wastegate solenoid 24
12 Power supply 25 Power supply
13 Power supply 26
Pin Connection Pin Connection
31 39
32 40
33 Generator G terminal 41 Generator FR terminal
34 42 AC intermediate pressure switch
35 43 Engine/transaxle general control torque reduction request signal 2
36 Check Engine light 44
37 Power steering pressure switch 45 AC switch
38 MFI relay (power supply) 46 Engine/transaxle general control torque execution signal
Pin Connection Pin Connection
51 57
52 58 Engine ignition signal
53 59
54 O2 sensor heater (rear) 60 O2 sensor heater (front)
55 61
56 62
Pin Connection Pin Connection
71 Ignition switch – ST 82
72 Intake air temp sensor 83 Coolant temp sensor
73 Manifold differential pressure sensor 84 Throttle position sensor
74 85 Barometric pressure sensor
75 O2 sensor (rear) 86 Vehicle speed sensor
76 O2 sensor (front) 87 Closed throttle position switch (Idle switch)
77 88 Camshaft position sensor
78 89 Crankshaft position sensor
79 90 Volume air flow sensor
80 Backup power supply 91 Park/Neutral position switch (used on ATs only)
81 Sensor impressed voltage 92 Ignition switch – IG

Happy Tuning!

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