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MITSUBISHI LANCER CA & CB 1.5L (4G15 Engine), Cyborg, CSM 1988-92 Engine Management System

ECM
The ECM is located behind the Left Hand Kick Panel for RHD (Right hand in North America for LHD).

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
(Inside Motor Position Sensor)
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 ECM 5 Volt Output
Ignition ON..................................................... 5 Volts


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


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

17 Motor Position Sensor Output Signal
Ignition ON
Dependant on ISC servo motor position............. Up to 5 Volts

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

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

62 Canister Purge (If Fitted)
Ignition ON
Engine OFF.................................................... Battery Volts

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

65 A/C Relay Coil Ground
Relay energised.............................................. Low Volts


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

104 Neutral / Drive Signal
Automatic Transmission
Ignition ON
Park or Neutral Selected................................. Low Volts
Any Other Gears Selected.............................. 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 Signal
Automatic Transmission
Ignition ON
Park or Neutral Selected................................. Low Volts
Any Other Gears Selected.............................. Battery Volts

109 Fuel Pump Voltage Supply Monitor
Fuel Pump Running......................................... Low Volts

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4g37 TB, MAF & Injectors. 4g37 ECU
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