Required Special Tools:

MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: MUT-III USB Cable
- MB991910: MUT-III Main Harness A

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Connect scan tool MB991958 to the data link connector.
Turn the ignition switch to the "ON" position.
Select "MFI system".
Select "Special Function" form the menu screen.
Select "Learned value reset".

Select the Item on the screen of the initialization for learning, and perform the initialization.

SERVICE AND ITEN CHART

Service

Item

Engine assembly replacement ⁽¹⁾, ⁽²⁾

All learned values

- ⁽³⁾

Misfire learned value

Injector and replacement cleaning ⁽²⁾

Fuel trim learned value

Throttle body cleaning and replacement ⁽¹⁾, ⁽²⁾

ISC learned value

Knock sensor replacement

Knock control learned value

⁽¹⁾	Initialize A/T-related learning value.

⁽²⁾	After initializing the learning value, the idling learning in MFI engine is required (Refer to LEARNING PROCEDURE FOR IDLING IN MFI ENGINE ).

⁽³⁾	The datum items on MUT-III display are shown, but do not use them.

Fig 1: Connecting Scan Tool MB991958 To Data Link Connector

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Initialization Procedure

Use the Manual With the Right Hardware

When to See a Mechanic