Montero Sport LS 2WD V6-3.0L SOHC (1998)
Data Link Connector: Testing and Inspection
Check Engine Light Does Not Turn Off
Description and Fault Judgement Criteria
DESCRIPTION AND FAULT JUDGEMENT CRITERIA
CIRCUIT OPERATION
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The check engine/malfunction indicator lamp power is supplied from the ignition switch.
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The ECM controls the ground of the check engine/malfunction indicator lamp by turning the power transistor in the ECM "ON" and "OFF."
COMMENT
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In cases such as this, the cause is probably that the ECM is detecting a problem in a sensor or actuator, or that one of the malfunctions listed at
right has probably occurred.
Diagnosis
4. THE CHECK ENGINE/MALFUNCTION INDICATOR LAMP REMAINS ILLUMINATED AND NEVER GOES OUT
TROUBLESHOOTING HINTS
The most likely causes for this case:
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Short-circuit between the check engine/malfunction indicator lamp and ECM.
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Malfunction of the ECM.
DIAGNOSIS
STEP 1. Using scan tool MB991502, read the diagnostic trouble code (DTC).
