Curb Idle Speed Check

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V. C. I.-Lite)
MB992745: V. C. I.-Lite main harness A
MB992747: V. C. I.-Lite USB cable short
MB992748: V. C. I.-Lite USB cable long

Fig 1: Identifying Ignition Coil No.1 And Timing Pickup Loop
MB991958: Scan Tool (M. U. T.-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V. C. I.)
- MB991827: M. U. T.-III USB Cable
- MB991910: M. U. T.-III Main Harness A (Vehicles with CAN communication system)

Before inspection, set the vehicle to the pre-inspection condition.
CAUTION: To prevent damage to scan tool (M. U. T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M. U. T.-III).
Turn the ignition switch to the "LOCK" (OFF) position and then connect scan tool (M. U. T.-III) to the data link connector. (Refer to DIAGNOSTIC FUNCTION ).
Set the timing light to the power supply line (terminal No. 3) of the ignition coil No. 1.
NOTE: The power supply line is looped and also longer than the other ones.
Start the engine.
Run the engine at idle for 2 minutes.
Check the actual ignition timing is at the standard value.
Standard value: Approximately 5° BTDC

NOTE: The ignition timing fluctuates about ± 7°, even under normal operating condition.

NOTE: It is automatically further advanced by about 5° from 10° Before Top Dead Center at higher altitudes.

NOTE: Wait till approximately 1 minute passes after the engine started, and check the ignition timing when the engine stabilized.
Check the idle speed. Select item number 2 and take a reading of the idle speed.
Curb idle speed: 650 ± 100 r/min

NOTE: The idle speed is controlled automatically by the idle air control system.
If the idle speed is outside the standard value. (Refer to SYMPTOM CHART ).
Remove the timing light.
CAUTION: To prevent damage to scan tool (M. U. T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M. U. T.-III).
Turn the ignition switch to the "LOCK" (OFF) position and then disconnect the scan tool (M. U. T.-III).

Fig 2: Identifying Ignition Coil No.1 And Timing Pickup Loop