Mitsubishi Montero (1991+). Manual - part 211

 

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Mitsubishi Montero (1991+). Manual - part 211

 

 

mechanism. Testing information is not available from manufacturer. See

appropriate wiring diagram in L - WIRING DIAGRAMS article in the

ENGINE PERFORMANCE Section.

         INTAKE AIR TEMPERATURE SENSOR

         1) Sensor is incorporated in airflow sensor assembly inside

air filter housing. Disconnect airflow sensor connector. See  Fig. 1.

Fig. 1:  Airflow Sensor Connector Terminal ID

Courtesy of Mitsubishi Motor Sales of America.

         2) Measure resistance between terminals No. 4 and 6 of

airflow sensor connector (sensor side of connector). For

specifications, see INTAKE AIR TEMPERATURE SENSOR RESISTANCE table.

Replace airflow sensor assembly if air temperature sensor resistance

is not within specification.

INTAKE AIR TEMP SENSOR RESISTANCE TABLE



Temperature



F (



C)                             Ohms

All Models

  32 (0)  ........................  6000

  68 (20)  .......................  2700

  176 (80)  .......................  400



         MOTOR POSITION SENSOR

NOTE:    Some engines are not equipped with Motor Position Sensor

         (MPS). MPS may be a separate unit mounted to throttle body

         or it may be incorporated in ISC motor assembly, depending

         upon vehicle application.

         Pickup 2.4L & Ram-50 2.4L

         1) Disconnect MPS connector. See Fig. 2. Connect ohmmeter

lead to ground. Connect other ohmmeter lead to terminal No. 3 of

sensor connector. If continuity is not present, repair wiring harness

as necessary. If continuity is present, go to next step.

Fig. 2:  Motor Pos. Sensor Connector Term. ID

Courtesy of Mitsubishi Motor Sales of America.

         2) Connect ohmmeter leads to terminals No. 2 and 3.

Resistance should be 4000-6000 ohms. If resistance is not within

specified range, replace MPS.

CAUTION:  DO NOT apply more than 6 volts to ISC motor.

         3) Operate ISC motor by connecting a 6-volt source directly

to appropriate terminals of ISC motor connector. For ISC motor

operation test procedures, see IDLE SPEED CONTROL (ISC) MOTOR

OPERATION TEST under IDLE CONTROL SYSTEM.

         4) While operating ISC motor, measure resistance between MPS

connector terminals No. 3 and 5. Observe ohmmeter during ISC motor

operation. If MPS resistance does not vary within a 4000-6000 ohm

range or if resistance does not change smoothly, replace MPS (vehicles

equipped with separate MPS) or ISC motor assembly (vehicles equipped

with MPS incorporated in ISC).

         OXYGEN SENSOR

         1-Wire Or 2-Wire

         1) On all models, warm engine until coolant temperature is

185-205



F (85-96



C). Disconnect oxygen sensor connector. See  Fig. 3 or

4.

         2) Connect digital voltmeter between terminal No. 1 and

ground. Repeatedly race engine and observe oxygen sensor output

voltage. If output is not 0.6-1.0 volt, replace oxygen sensor.

Fig. 3:  O2 Sensor Connector Terminal ID (1 Wire)

Courtesy of Mitsubishi Motor Sales of America.

Fig. 4:  O2 Sensor Connector Terminal ID (2 Wire)

Courtesy of Mitsubishi Motor Sales of America.

         4-Wire Heated

         1) Warm engine until coolant temperature is 185-205



F (85-

 

 

 

 

 

 

 

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