Mitsubishi Lancer (4A9 engine). Manual - part 158

 

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Mitsubishi Lancer (4A9 engine). Manual - part 158

 

 

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-294

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 
SRS-ECU. (Refer to GROUP 00 

− How to 

Use Troubleshooting/Inspection Service 
Points - How to Cope with Intermittent 
Malfunction .)

Code No.U0155 Meter CAN timeout

CAUTION

• If the diagnosis code No. U0155 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 combination meter cannot be 
received, the radio and CD player sets the diagnosis 
code No. U0155.

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 combina-
tion meter 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 combination meter

• 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 combi-
nation meter.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the combination meter (Refer 

to ).

NO : 

Go to Step 3.

STEP 3. Check the M.U.T.-III Diagnosis code for 
other systems
Check if the diagnosis code No. U0155 is set to 
ETACS-ECU.

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 combination meter.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the radio and CD player and the 
combination meter. (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?

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-295

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 
combination meter. (Refer to GROUP 00 

− 

How to Use Troubleshooting/Inspection 
Service Points - How to Cope with 
Intermittent Malfunction .)

Code No.U0164 A/C-ECU CAN timeout

CAUTION

• If the diagnosis code No. U0164 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 A/C-ECU <vehicle with A/C> or 
heater control unit <vehicle without A/C> cannot be 
received, the radio and CD player sets the diagnosis 
code No. U0164.

JUDGEMENT 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 A/C-ECU 
<vehicle with A/C> or heater control unit <vehicle 
without A/C> 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 A/C-ECU <vehicle with A/C> 

or heater control unit <vehicle without A/C>

• 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 if diagnosis code is set to the A/C-ECU <vehi-
cle with A/C> or heater control unit <vehicle without 
A/C>.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the A/C-ECU <vehicle with A/

C> or heater control unit <vehicle without A/
C> (Refer to GROUP 55A 

− 

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. U0164 is set to 
ETACS-ECU.

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 A/C-ECU <vehicle with A/C> or 

heater control unit <vehicle without A/C>.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the radio and CD player and the A/
C-ECU <vehicle with A/C> or heater control 
unit <vehicle without A/C>. (Refer to 
GROUP 00 

− How to Use Troubleshooting/

Inspection Service Points - How to Cope 
with Intermittent Malfunction .)

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-296

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 A/
C-ECU <vehicle with A/C> or heater control 
unit <vehicle without A/C>. (Refer to 
GROUP 00 

− How to Use Troubleshooting/

Inspection Service Points - How to Cope 
with Intermittent Malfunction .)

Code No.U0168 WCM/KOS CAN timeout

CAUTION

• If diagnosis code No. U0168 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 WCM or KOS-ECU cannot be 
received, the radio and CD player sets the diagnosis 
code No. U0168.

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 WCM or 
KOS-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 WCM <Vehicles with WCM>

• Malfunction of the KOS <Vehicles with KOS-

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 WCM 
or KOS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the WCM or KOS-ECU (Refer 

to GROUP 42C 

− Diagnosis Code Chart  

<Vehicles with WCM> or GROUP 42B 

− 

Diagnosis Code Chart  <Vehicles with 
KOS>).

NO : 

Go to Step 3.

STEP 3. Check the M.U.T.-III Diagnosis code for 
other systems
Check if the diagnosis code No. U0168 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 WCM <Vehicles with WCM> or 

KOS <Vehicles with KOS-ECU>.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the radio and CD player and the 
WCM <Vehicles with WCM> or KOS 
<Vehicles with KOS-ECU>. (Refer to 
GROUP 00 

− How to Use Troubleshooting/

Inspection Service Points - How to Cope 
with Intermittent Malfunction .)

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-297

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 
WCM <Vehicles with WCM> or KOS 
<Vehicles with KOS-ECU>. (Refer to 
GROUP 00 

− How to Use Troubleshooting/

Inspection Service Points - How to Cope 
with Intermittent Malfunction .)

Code No.U1415 Coding not completed/Data fail

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 vehicle information data is not registered 
to the radio and CD player sets the diagnosis code 
No.U1415.

COMMENTS ON TROUBLE SYMPTOM
The radio and CD player, ETACS-ECU, or CAN bus 
line may have a problem.

PROBABLE CAUSES

• Malfunctions of radio and CD player

• Malfunction of the ETACS-ECU

• 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. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Diagnose the ETACS-ECU (Refer to 

ETACS 

− Troubleshooting ).

NO : 

Go to Step 3.

STEP 3. 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 : 

The trouble can be an intermittent 
malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

 

 

 

 

 

 

 

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