Montero Sport LTD 4WD V6-3.5L SOHC (1999)
Malfunction Indicator Lamp: Testing and Inspection
3. SES/MIL Lamp Does Not Illuminate With Ignition Switch "on"
CIRCUIT OPERATION
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The service engine soon/malfunction indicator lamp power is supplied from the ignition switch.
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The ECM <M/T>/PCM <A/T> controls the ground of the service engine soon/malfunction indicator lamp by turning the power transistor in the
ECM <M/T>/PCM <A/T> "ON" and "OFF."
COMMENT
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The ECM <M/T>/PCM <A/T> causes the service engine soon/malfunction indicator lamp to illuminate for 5 seconds immediately after the
ignition switch is turned to "ON" occurred.
TROUBLESHOOTING HINTS
The most likely causes for this case:
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Burnt-out bulb.
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Defective service engine soon/malfunction indicator lamp circuit.
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Malfunction of the ECM <M/T>.
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Malfunction of the PCM <A/T>.
WIRING DIAGRAM
