Montero 4WD V6-3.5L SOHC (1998)
OK: GO TO STEP 2
NG: Repair the harness. (A2 - 49)
STEP 2. Check for an open or short-circuit between the engine coolant temperature sensor and the engine control module.
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Engine coolant temperature sensor connector: Disconnected
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Engine control module connector: Disconnected
OK: GO TO STEP 3
NG: Repair the harness. (A1 - 44)
STEP 3. Measure the power supply voltage.
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Engine coolant temperature sensor connector: Disconnected
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Engine control module connector: Connected
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Ignition switch: ON
Voltage (V): 4.5 - 4.9 V
OK: STOP
NG: Replace the engine control module.
ENGINE COOLANT TEMPERATURE SENSOR CHECK:
(1) Remove the engine coolant temperature sensor from the intake manifold.
(2) With temperature sensing portion of coolant temperature sensor immersed in hot water check resistance.
Standard value:
(3) If the resistance is outside the standard value greatly, replace the sensor.