Mitsubishi Evolution X. Manual - part 1025

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

54A-461

HOW TO DIAGNOSE THE CAN BUS LINES

Required Special Tools:

• 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)

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it 

matches the vehicle being diagnosed.

• If they match, go to step 8.

• If not, go to step 5.

5. Select the "view vehicle information" button.
6. Enter the vehicle information and select the "OK" button.
7. When the vehicle information is displayed, confirm again 

that it matches the vehicle being diagnosed.

• If they match, go to step 8.

• If not, go to step 5.

8. Select the "OK" button.
9. When the optional equipment screen is displayed, choose 

the one which the vehicle is fitted with, and then select the 
"OK" button.

CHECK OF FREEZE FRAME DATA

The freeze frame data can be checked by using M.U.T.-III.

.

When detecting fault and storing the diagnostic trouble code, 
the ECU connected to CAN bus line obtains the data before the 
determination of the diagnostic trouble code and the data when 
the diagnostic trouble code is determined, and then stores the 
ECU status of that time. By analyzing each data from M.U.T.-III, 
the troubleshooting can be performed more efficiently. The dis-
played items are as the table below.

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

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Display item list

DIAGNOSTIC TROUBLE CODE CHART

M1544403200015

CAUTION

On troubleshooting, if the ignition switch is 
turned ON while disconnecting connector(s), 
diagnostic trouble code(s) associated with other 
system may be set. On completion, confirm all 
systems for diagnostic trouble code(s). If diag-
nostic trouble code(s) are set, erase them all.

Item No.

Item name

Data item

Unit

1

Odometer

Total driving distance after the diagnostic trouble 
code is generated

km

2

Ignition cycle

Number of times the ignition switch is turned "ON" or 
"LOCK (OFF)" after the past failure transition

Number of 
counts is 
displayed.

4

Accumulated minute Cumulative time for current malfunction of 

diagnostic trouble code

min

DTC No.

Description

Reference page

B2468

Microphone input short to BATT

P.54A-463

B2470

Microphone input short to ground

B2471

On hook button stuck

P.54A-466

B2472

Off hook button stuck

B2473

VR button stuck

B2475

VIN not programmed

P.54A-472

U0019

Bus off (CAN-B)

P.54A-473

U0141

ETACS CAN timeout

P.54A-475

U0151

SRS-ABG CAN timeout

P.54A-476

U0154

OCM CAN timeout

P.54A-478

U0155

Meter CAN timeout

P.54A-479

U0164

A/C CAN timeout

P.54A-481

U0168

WCM CAN timeout

P.54A-482

U0184

AUDIO CAN timeout

P.54A-484

U0195

Satellite radio CAN timeout

P.54A-485

U0245

AND CAN timeout

P.54A-487

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

54A-463

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC B2468: Microphone input short to BATT

 

DTC B2470: Microphone input short to ground

CAUTION

Before replacing the ECU, ensure that the communication circuit is normal.

Hands Free Cellular Phone System Circuit

MICROPHONE
UNIT

HANDS 
FREE MODULE

AC708951BT

Connector: C-11

AC708950

Connector: C-133

AF

HANDS-FREE CELLULAR PHONE SYSTEM

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CHASSIS ELECTRICAL

54A-464

.

JUDGMENT CRITERIA

When the hands free module judges that the connec-
tion with microphone unit is abnormal for 5 seconds 
or more, it stores diagnostic trouble code B2468 or 
B2470.

.

PROBABLE CAUSES

• The hands free module may be defective.

• The microphone unit may be defective.

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

• 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)

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to diagnose the CAN bus lines.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.54A-459

."

(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the CAN bus line (Refer to GROUP 54C, 

Diagnosis 

P.54C-14

).

AC708954 AT

Connector: D-04

AC608435

Data link connector

MB991827

MB991824

MB991910

AB