Mitsubishi Lancer (4A9 engine). Manual — part 157
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-290
STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING
M1544004800528
Refer to GROUP 00
− Contents of troubleshooting .
DIAGNOSIS FUNCTION
M1544013200267
HOW TO READ DIAGNOSIS CODE
GROUP 00
− Diagnosis function .
HOW TO ERASE DIAGNOSIS CODE
GROUP 00
− Diagnosis function .
CHECK OF FREEZE FRAME DATA
The freeze frame data can be checked by using
M.U.T.-III.
When detecting fault and storing the diagnosis code,
the ECU connected to CAN bus line obtains the data
before the determination of the diagnosis code and
the data when the diagnosis code is determined, and
then stores the ECU status of that time. By analysing
each data from M.U.T.-III, the troubleshooting can be
performed more efficiently. The displayed items are
as the table below.
i CONNECT
i RETRY
iPod cannot be
authenticated.
iPod is not authenticated. Reconnect. If the error code is not
erased after that, the USB box communication may have a
problem. Carry out the troubleshooting of "The USB adapter
data cannot be replayed". (Refer to <Vehicles without Auto
Stop & Go (AS&G) System> or <Vehicles with Auto Stop & Go
(AS&G) System>.)
U NO SONG No playable music file is
found.
No playable music file is stored in the USB memory. Store
music files to the USB memory.
U FILE
ERROR
Playback of unplayable file
(copyright protected file,
etc.) is attempted.
Displayed when the playback of unplayable file such as a
copyright protected file is attempted. The error code is
displayed approximately for 3 seconds, and then a next
playable file is played automatically.
UNSUPPOR
TED DEVICE
Unsupported device
The USB memory is not supported by the USB box. Use the
supported USB memory.
UNSUPPOR
TED
FORMAT
Unsupported format
USB BUS
PWR
Overcurrent abnormality
There is a communication error with the USB box. Carry out the
troubleshooting of "The USB adapter data cannot be replayed".
(Refer to <Vehicles without Auto Stop & Go (AS&G) System>
or <Vehicles with Auto Stop & Go (AS&G) System>.)
U CONNECT
U RETRY
USB memory cannot be
authenticated.
The USB memory is not authenticated. Reconnect. If the error
code is not erased after that, the USB box communication may
have a problem. Carry out the troubleshooting of "The USB
adapter data cannot be replayed". (Refer to <Vehicles without
Auto Stop & Go (AS&G) System> or <Vehicles with Auto Stop
& Go (AS&G) System>.)
U LSI
ERROR
USB box internal error
This error code will be shown when there is a problem in the
USB box. Replace the USB box.
Error code
Cause
Cause of trouble and its solution
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-291
Display item list
DIAGNOSIS CODE CHART
M1544012900478
CAUTION
On troubleshooting, if the ignition switch is
turned ON while disconnecting connector(s),
diagnosis code(s) associated with other system
may be set. On completion, confirm all systems
for diagnosis code(s). If diagnosis code(s) are
set, erase them all.
DIAGNOSIS CODE PROCEDURES
Code No.U0019 Bus off (CAN-B)
CAUTION
• If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior
to this diagnosis, always diagnose the CAN
bus lines.
• Before replacing the radio and CD player, be
sure to check that the power supply circuit,
earth circuit, and communication circuit are
normal.
TROUBLE JUDGMENT
When the radio and CD player is returned from the
bus off state, or when the bus error is indicated to the
radio and CD player state, the diagnosis code U0019
(CAN-B) is set.
Item No.
Item name
Data item
Unit
1
Odometer
Total driving distance after the diagnosis 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 diagnosis
code
min
Diagnosis
code No.
Diagnostic item
Reference page
U0019
Bus off (CAN-B)
U0141
ETACS-ECU CAN timeout
U0151
SRS-ABG CAN timeout
U0155
Meter CAN timeout
U0164
A/C-ECU CAN timeout
U0168
WCM/KOS CAN timeout
U1415
Coding not completed/Data fail
B2420
Power integrated circuit
B2421
Radio tuner
B2423
6-disc CD player error
B2424
CD player error
B2450
Switch panel communication
B2451
Audio panel type error
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-292
COMMENTS ON TROUBLE SYMPTOM
The radio and CD player, power supply for the radio
and CD player, earth circuit, or CAN bus line may
have a problem.
PROBABLE CAUSES
• Malfunctions of radio and CD player
• Malfunction of CAN bus line wiring harness and
connector
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54C
− Troubleshooting ).
STEP 2. Check whether the M.U.T.-III can
communicate with the radio and CD player.
Q: Is the check result normal?
YES :
Erase the diagnosis code. This diagnosis is
complete.
NO :
Check the power supply circuit of the radio
and CD player, and repair if necessary.
Code No.U0141 ETACS-ECU CAN timeout
CAUTION
• If the diagnosis code No. U0141 is set, be sure
to diagnose the CAN bus line.
• When replacing the radio and CD player,
always check that the communication circuit
is normal.
DIAGNOSTIC FUNCTION
If the signal from ETACS-ECU cannot be received,
the radio and CD player sets the diagnosis code No.
U0141.
JUDGMENT CRITERIA
With the statuses that the ignition switch is at ON
position, system voltage is 10
− 16 V (data from
ETACS-ECU), and there is no malfunction to the
power supply fuse (IOD fuse), or odometer value is
80.5 km or more, if the communication with ETACS-
ECU cannot be established for 2,500 ms or more,
the radio and CD player determines that a problem
has occurred.
PROBABLE CAUSES
• Malfunction of CAN bus line
• Malfunction of radio and CD player
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54C
− Troubleshooting ).
STEP 2. M.U.T.-III other system diagnosis code
Check again if the diagnosis code is set to the
ETACS-ECU.
Q: Is the diagnosis code set?
YES :
Diagnose the ETACS-ECU (Refer to
GROUP 54A
− ETACS-ECU −
Troubleshooting ).
NO :
Go to Step 3.
STEP 3. Check the M.U.T.-III Diagnosis code for
other systems
Check if the diagnosis code No. U0141 is set to com-
bination meter.
Q: Is the diagnosis code set?
YES :
Go to Step 4.
NO :
Go to Step 5.
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set to the radio
and CD player.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the LOCK (OFF)
position to the ON position.
(3) Check if the diagnosis code is set.
Q: Is the diagnosis code set?
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-293
YES :
Replace the ETACS-ECU.
NO :
A poor connection, open circuit or other
intermittent malfunction in the CAN bus line
between the radio and CD player and the
ETACS-ECU. (Refer to GROUP 00
− How
to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunction .)
STEP 5. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to the radio
and CD player.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) Check if diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the radio and CD player.
NO :
A poor connection, open circuit or other
intermittent malfunction in the CAN bus line
between the radio and CD player and the
ETACS-ECU. (Refer to GROUP 00
− How
to Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunction .)
Code No.U0151 SRS-ABG CAN timeout
CAUTION
• If the diagnosis code No. U0151 is set, be sure
to diagnose the CAN bus line.
• When replacing the radio and CD player,
always check that the communication circuit
is normal.
DIAGNOSTIC FUNCTION
If the signal from SRS-ECU cannot be received, the
radio and CD player sets the diagnosis code No.
U0151.
JUDGMENT CRITERIA
With the statuses that the ignition switch is at ON
position, system voltage is 10
−16 V (data from
ETACS-ECU), and there is no malfunction to the
power supply fuse (IOD fuse), or odometer value is
80.5 km or more, if the communication with SRS-
ECU cannot be established for 2,500 ms or more,
the radio and CD player determines that a problem
has occurred.
PROBABLE CAUSES
• Malfunction of CAN bus line
• Malfunction of the SRS-ECU
• Malfunction of radio and CD player
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54C
− Troubleshooting ).
STEP 2. M.U.T.-III other system diagnosis code
Check again if the diagnosis code is set to the SRS-
ECU.
Q: Is the diagnosis code set?
YES :
Troubleshoot the SRS-ECU (Refer to
GROUP 52B
− Troubleshooting ).
NO :
Go to Step 3.
STEP 3. Check the M.U.T.-III Diagnosis code for
other systems
Check if the diagnosis code No. U0151 is set to com-
bination meter.
Q: Is the diagnosis code set?
YES :
Go to Step 4.
NO :
Go to Step 5.
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set to the radio
and CD player.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the LOCK (OFF)
position to the ON position.
(3) Check if the diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Replace the SRS-ECU.
NO :
A poor connection, open circuit or other
intermittent malfunction in the CAN bus line
between the radio and CD player and the
SRS-ECU. (Refer to GROUP 00
− How to
Use Troubleshooting/Inspection Service
Points - How to Cope with Intermittent
Malfunction .)
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