4g61t.org

MITSUBISHI LANCER CB 1.6L DOHC (4G61 Engine) 1990-92 Engine Management System




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



ECM Voltage Table


1 to 24 Connector






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.............................................. 0.2 to 0.8 Volts
Normal Signal................................................ 0.5 Volts Approx.




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
Ignition ON
Throttle at rest position.................................... Low volts
Throttle open................................................... Battery volts



7 A/C 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 Output
Ignition ON...................................................... 5 volts
Engine Running.............................................. Digital Signal




Output Signal Increases in Frequency with Increase in Air Flow.



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



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



18 Vehicle Speed Sensor
Ignition ON...................................................... Low or 5 volts
Engine Running............................................... Digital Signal

5 volt 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 volt



21 Crank Angle Sensor
Engine Cranking or Running............................. Digital Signal
5 volt square wave
Oscilloscope Pattern



22 # 1 Cylinder TDC Sensor
Engine Cranking or Running............................. Digital Signal
5 volt square wave
Oscilloscope Pattern



23 ECM 5 Volt Output
Ignition ON...................................................... 5 volts



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



51 to 68 Connector






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 volt pulses



59 Idle Speed Control Motor
Ignition ON...................................................... Battery volts
Engine running................................................ Low volt 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
Engine Checklight OFF................................... Battery volts



65 A/C 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 volt pulses



68 Idle Speed Control Motor
Ignition ON...................................................... Battery volts
Engine running................................................ Low volt pulses



101 to 110 Connector






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


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
Engine cranking............................................... Battery volts



109 Coil Switching Power Transistor
Engine running................................................ Digital signal



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



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





ECM Voltage Table


1 to 24 Connector






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.............................................. 0.2 to 0.8 Volts
Normal Signal................................................ 0.5 Volts Approx.




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
Ignition ON
Throttle at rest position.................................... Low volts
Throttle open................................................... Battery volts



7 A/C 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 Output
Ignition ON...................................................... 5 volts
Engine Running.............................................. Digital Signal




Output Signal Increases in Frequency with Increase in Air Flow.



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



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



18 Vehicle Speed Sensor
Ignition ON...................................................... Low or 5 volts
Engine Running............................................... Digital Signal

5 volt 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 volt



21 Crank Angle Sensor
Engine Cranking or Running............................. Digital Signal
5 volt square wave
Oscilloscope Pattern



22 # 1 Cylinder TDC Sensor
Engine Cranking or Running............................. Digital Signal
5 volt square wave
Oscilloscope Pattern



23 ECM 5 Volt Output
Ignition ON...................................................... 5 volts



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



51 to 68 Connector






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 volt pulses



59 Idle Speed Control Motor
Ignition ON...................................................... Battery volts
Engine running................................................ Low volt 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
Engine Checklight OFF................................... Battery volts



65 A/C 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 volt pulses



68 Idle Speed Control Motor
Ignition ON...................................................... Battery volts
Engine running................................................ Low volt pulses



101 to 110 Connector






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


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
Engine cranking............................................... Battery volts



109 Coil Switching Power Transistor
Engine running................................................ Digital signal



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

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91' Colt GL hatchback
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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
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