Mitsubishi Lancer (4A9 engine). Manual - part 95

COMBINATION METER

CHASSIS ELECTRICAL

54A-42

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 engine-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the engine (Refer to GROUP 

13A 

− Troubleshooting  <1600> or GROUP 

13B 

− Troubleshooting  <1800-Petrol-

DOHC, 2000> or GROUP 13C 

− 

Troubleshooting  <1800-Diesel> or GROUP 
13F 

− Troubleshooting  <1800-Petrol-

SOHC>).

NO : 

Go to Step 3.

STEP 3. Check the M.U.T.-III Diagnosis code for 
other systems
Check if the diagnosis code No. U0100 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 combi-
nation meter.
(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 engine-ECU.

NO : 

A poor connection, open circuit, or other 
intermittent malfunction in the CAN bus line 
between the combination meter and the 
engine-ECU. (Refer to GROUP 00 

− How to 

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

STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set to the combi-
nation meter.
(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 combination meter and the 
engine-ECU. (Refer to GROUP 00 

− How to 

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

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 ECU, always check that 

the communication circuit is normal.

DIAGNOSTIC FUNCTION
If the signal from ETACS-ECU cannot be received, 
the combination meter 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 combination meter determines that a problem 
has occurred.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of combination meter

• Malfunction of the ETACS-ECU

COMBINATION METER

CHASSIS ELECTRICAL

54A-43

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use 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 lines. (Refer to GROUP 
54C 

− Troubleshooting .)

STEP 2. M.U.T.-III diagnosis code for other 
systems
Check again if the diagnosis code is set to the 
ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot 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 
SRS-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 combi-
nation meter.
(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 ETACS-ECU.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the combination meter and the 
ETACS-ECU. (Refer to GROUP 00 

− How 

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

STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set to the combi-
nation meter.
(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 combination meter 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-ECU CAN timeout

CAUTION

• If the diagnosis code No. U0151 is set, be sure 

to diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSTIC FUNCTION
If the signal from SRS-ECU cannot be received, the 
combination meter 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 combination meter determines that a problem 
has occurred.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of the SRS-ECU

• Malfunction of combination meter

COMBINATION METER

CHASSIS ELECTRICAL

54A-44

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 
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 combi-
nation meter.
(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 SRS-ECU.

NO : 

A poor connection, open circuit, or other 
intermittent malfunction in the CAN bus line 
between the combination meter and SRS-
ECU. (Refer to GROUP 00 

− How to Use 

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

STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set to the combi-
nation meter.
(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 combination meter and SRS-
ECU. (Refer to GROUP 00 

− How to Use 

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

Code No.U0164 A/C/Heater control unit CAN timeout

CAUTION

• If the diagnosis code No. U0164 is set, be sure 

to diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSTIC FUNCTION
If the signal from A/C-ECU cannot be received, the 
combination meter sets the diagnosis code No. 
U0164.

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 A/C-ECU 
cannot be established for 2,500 ms or more, the 
combination meter determines that a problem has 
occurred.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of the A/C-ECU

• Malfunction of combination meter

COMBINATION METER

CHASSIS ELECTRICAL

54A-45

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.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the A/C-ECU (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 combi-
nation meter.
(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.

NO : 

A poor connection, open circuit, or other 
intermittent malfunction in the CAN bus line 
between the combination meter and A/C-
ECU. (Refer to GROUP 00 

− How to Use 

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

STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set to the combi-
nation meter.
(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 combination meter and A/C-
ECU. (Refer to GROUP 00 

− How to Use 

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

Code No.U0168 KOS/WCM CAN timeout

CAUTION

• If diagnosis code No. U0168 is set, be sure to 

diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSTIC FUNCTION
If the signal from KOS-ECU or WCM cannot be 
received, the combination meter 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 KOS-
ECU or WCM cannot be established for 2,500 ms or 
more, the combination meter determines that a prob-
lem has occurred.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of the KOS-ECU

• Malfunction of the WCM

• Malfunction of combination meter