Montero Sport 2WD V6-3.0L SOHC (1997)
Idle Speed/Throttle Actuator - Electronic: Oscilloscope Patterns and Waveforms
IDLE AIR CONTROL MOTOR (STEPPER MOTOR)
Required Special Tool:
MD998463: Test Harness
Measurement Method
1. Disconnect the idle air control motor connector and connect the test harness special tool (MD998463) in between.
2. Connect the analyzer special patterns pickup to the idle air control motor connector terminal 1 (red clip of special tool), terminal 3 (blue clip),
terminal 4 (black clip) and terminal 6 (yellow clip), respectively.
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to ECM terminals 4, 5, 17 and 18.
Standard Wave Pattern Observation Conditions
Wave Pattern Observation Points
1. Check that the standard wave pattern appears when the idle air control motor is operating.
Point A:
Presence or absence of induced electromotive force from the motor turning. (Refer to abnormal wave pattern.)