4g61t.org

MITSUBISHI GALANT HG & HH (2.0L DOHC Engine) 1989 - 92 Engine Management System



ECM
The ECM is located behind the Left Hand Kick Panel.

ECM Voltage Table

Connector '1 to 24'

Pin # Circuit and Status.......................................... Voltage
1 Diagnostic Connector
Fault Code Output - Terminal 1
Diagnostic Connector Grounded........................ Low Volts

2 Diagnostic Connector
Idle Speed Disable - Terminal 10
Diagnostic Connector Grounded........................ Low Volts

4 Oxygen Sensor Signal
Engine Warm
Engine Running at 2000 RPM........................... 0.2 to 0.8 Volts
Normal Signal around 0.5 Volts

Normally fluctuates 7 to 8 times in 10 Seconds

5 Power Steering Switch
Ignition ON
Steering Wheel at Rest.................................... Battery Volts
Steering Wheel turned from Rest Position.......... Low Volts

6 Idle Switch
SOHC
Ignition ON
Throttle at Rest Position................................... Low Volts
Throttle Open.................................................. 5 Volts

7 Air Conditioner ON Request Signal
Signal meets ON Specifications........................ Low Volts
Signal does not meet ON Specifications............ 0 Volts

8 Air Mass Meter
Air Charge Temperature Sensor Output
Ignition ON
Air Temperature @ 20° C.
Engine Running............................................... 4 to 5 Volts

Voltage Output Decreases with Increase in Temperature

10 Air Mass Meter - Air Flow Sensor Signal
Ignition ON...................................................... 5 Volts
Engine Running at Idle..................................... Digital Signal (30 to 46 Hz)
Engine Running at 2000 RPM........................... Digital Signal (62 to 82 Hz)

12 Spark Advance Disable Connector
Connector NOT Grounded................................. 5 Volts
Connector Grounded........................................ Low Volts

13 Fuel Pump Supply Volts Monitor
Fuel Pump running........................................... Low Volts

14 Idle Switch
Ignition ON
Throttle at Rest Position................................... Low Volts
Throttle Open.................................................. Battery Volts

16 Air Mass Meter
Barometric Air Pressure (BAP) Sensor Output
Ignition ON
BAP of 103 kPa Approx. (Sea Level)................. 4 Volts Approx.

17 Sensor Ground
Ignition ON / OFF............................................ 0 Volts

18 Vehicle Speed Sensor
Ignition ON...................................................... Low or 5 Volts
Engine Running............................................... Digital Signal
5 Volts Square Wave
Oscilloscope pattern

19 Throttle Position Sensor Output Signal
Ignition ON
Throttle at Rest................................................ 0.48 to 0.52 Volts
Throttle Fully Open.......................................... 4.8 to 5.2 Volts

20 Engine Coolant Temperature Sensor
Ignition ON
Engine Cold.................................................... 2 to 3 Volts
Engine Warm.................................................. Approx. 1 Volts

21 Crank Angle Sensor
Ignition ON...................................................... 5 Volts
Engine Running............................................... Digital Signal
5 Volts Square Wave
Oscilloscope pattern

22 # 1 Cylinder TDC Sensor
Ignition ON...................................................... 5 Volts
Engine Running............................................... Digital Signal
5 Volts Square Wave
Oscilloscope pattern

23 ECM 5 Volts Output
Ignition ON...................................................... 5 Volts

24 Sensor Ground
Ignition ON / OFF............................................ 0 Volts



Connector '51 to 68'

Pin # Circuit and Status.......................................... Voltage
51 Injector Ground
Ignition ON..................................................... Battery Volts

52 Injector Ground
Ignition ON..................................................... Battery Volts

54 Coil Switching Power Transistor
Engine Cranking or running............................... Digital Signal

55 Coil Switching Power Transistor

Engine cranking or running............................... Digital Signal

56 Control Relay Ground
Control Relay Energised................................... Low Volts

58 Idle Speed Control Motor
Ignition ON...................................................... Battery Volts
Engine Running............................................... Low Volts Pulses

59 Idle Speed Control Motor
Ignition ON...................................................... Battery Volts
Engine Running............................................... Low Volts Pulses

60 Injector Ground
Ignition ON...................................................... Battery Volts

61 Injector Ground
Ignition ON...................................................... Battery Volts

63 Control Relay Ground
Control Relay Energised................................... Low Volts

64 Engine Checklight Ground
Engine Running
Checklight OFF............................................... Battery Volts

65 Air Conditioner Relay Coil Ground
Relay Energised.............................................. Low Volts

66 Control Relay Ground
Control Relay Energised................................... Low Volts

67 Idle Speed Control Motor
Ignition ON...................................................... Battery Volts
Engine Running............................................... Low Volts Pulses

68 Idle Speed Control Motor
Ignition ON...................................................... Battery Volts
Engine Running............................................... Low Volts Pulses


Connector '101 to 110'

Pin # Circuit and Status.......................................... Voltage
101 ECM Ground
Ignition ON / OFF............................................ 0 Volts

102 ECM Supply Volts
Control Relay Energised................................... Battery Volts

103 ECM Supply Volts Permanent RAM supply
Ignition ON / OFF............................................ Battery Volts

104 ECM Ground
Manual Transmission
Ignition ON / OFF............................................ 0 Volts

104 Start Signal
Automatic Transmission
Engine Cranking.............................................. Battery Volts

105 Oxygen Sensor Heater Ground
Heater ON...................................................... Low Volts
Heater OFF..................................................... Battery Volts

106 ECM Ground
Ignition ON / OFF............................................ 0 Volts

107 Supply Volts for ECM / Sensors
Control Relay Energised................................... Battery Volts

108 Start Signal
Manual Transmission
Engine Cranking.............................................. Battery Volts

108 Neutral / Drive Switch
Automatic Transmission
Ignition ON
Park or Neutral Selected.................................. Low Volts
Any Other Gear Selected................................. Battery Volts

109 Coil Switching Power Transistor
Engine Running............................................... Digital Signal

110 ECM Supply Volts
Ignition ON...................................................... Battery Volts

_________________
http://members.cardomain.com/socrateez
04' Olds Alero
91' Colt GL hatchback
4g15 12valve 5spd.
4g37 TB, MAF & Injectors. 4g37 ECU
Ported & polished & custom CAI w/K&N filter
5* Cam retard, 7*Ignition advance
2-1/4" catback w/flowmaster muffler
89 GT brake and suspension swap
Lots of little s#@t