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
54A-462
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
B2470
Microphone input short to ground
B2471
On hook button stuck
B2472
Off hook button stuck
B2473
VR button stuck
B2475
VIN not programmed
U0019
Bus off (CAN-B)
U0141
ETACS CAN timeout
U0151
SRS-ABG CAN timeout
U0154
OCM CAN timeout
U0155
Meter CAN timeout
U0164
A/C CAN timeout
U0168
WCM CAN timeout
U0184
AUDIO CAN timeout
U0195
Satellite radio CAN timeout
U0245
AND CAN timeout
HANDS-FREE CELLULAR PHONE SYSTEM
TSB Revision
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)
."
(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,
).
AC708954 AT
Connector: D-04
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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