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
-
The service engine soon/malfunction indicator lamp power is supplied from the ignition switch.
-
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
-
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:
-
Burnt-out bulb.
-
Defective service engine soon/malfunction indicator lamp circuit.
-
Malfunction of the ECM <M/T>.
-
Malfunction of the PCM <A/T>.
WIRING DIAGRAM