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Jetta L4-1781cc 1.8L SOHC (ACC) Can (1995)

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Diagrams > Page 1873

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Engine Control Module: Service and Repair

Mono-Motronic Engine Control Module (ECM), component layout 

 

1 -  ECM harness connector

^  Disconnect with ignition switched OFF

2 -  Mono-Motronic Engine Control Module (ECM) (J257)*

^  For fuel injection system, oxygen sensor control, knock regulation, speed sensor, ignition, diagnostic trouble code memory and on-board

diagnostic

^  Location: in plenum on right side

3 -  ECM mounting bracket

^  For Mono-Motronic Engine Control Module (J257)

4 -  10 Nm (7 ft lb) 
5 -  Harness connector

^  Four-pin

6 -  Engine Coolant Temperature (ECT) Sensor (G62)

^  Resistance values, Fig 1 below

7 -  O-ring

^  Always replace

8 -  Clip
9 -  Connector flange

10 -  Heated Oxygen Sensor (H026) (G39)

^  Tightening torque: 50 Nm (37 ft lb) 
^  Lubricate only with G5
^  Lubricant must not enter slots in sensor
^  Checking heating circuit power supply.   See: Computers and Control Systems/Oxygen Sensor/Testing and Inspection
^  Check continuity of sensor heater

11 -  Harness connector

^  Four-pin
^  For Heated Oxygen Sensor (G69) (sensor and heater circuits)

*  Tested by On Board Diagnostic program.   See: Computers and Control Systems/Testing and Inspection

 
 

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Diagrams > Page 1873

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