Mitsubishi Outlander (2013+). Manual - part 740

 

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Mitsubishi Outlander (2013+). Manual - part 740

 

 

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-16

STEP 2. M.U.T.-III other system diagnosis code
Check whether the audio-related diagnosis code is 
set.

Q: Is the diagnosis code set?

YES : 

Diagnose the power gate. Refer to .

NO : 

Go to Step 3

STEP 3. M.U.T.-III other system diagnosis code
Check if a diagnosis code, which relates to CAN 
communication-linked systems below, is set.

• ETACS-ECU

U0230: Power Gate CAN timeout

Q: Is the diagnosis code set?

YES : 

Go to Step 4

NO : 

Go to Step 5

STEP 4. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the electric tailgate, and then go to 

Step 6.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the electric tailgate and the heater 
controller assembly (A/C-ECU) (Refer to 
GROUP 00 

− How to Cope with Intermittent 

Malfunction ).

STEP 5. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the heater controller assembly 

(A/C-ECU), and then go to Step 6. 

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the electric tailgate and the heater 
controller assembly (A/C-ECU) (Refer to 
GROUP 00 

− How to Cope with Intermittent 

Malfunction ).

STEP 6. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Return to Step 1.

NO : 

The procedure is complete.

Code No. U0245: ANDCAN time-out

CAUTION

If diagnosis code No.U0245 is set in the heater 
controller assembly (A/C-ECU), diagnose the 
CAN main bus line.

CAUTION

Whenever the ECU is replaced, ensure that the 
communication circuit is normal.

TROUBLE JUDGMENT

The heater controller assembly (A/C-ECU) receives 
air conditioner control-related signals from the com-
bination meter or CAN box unit (MMCS) via the CAN 
bus lines. If the ECU cannot receive any of the air 
conditioner control-related signals from the combina-
tion meter or CAN box unit (MMCS), diagnosis code 
U0245 will be stored.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• Connector(s) or wiring harness in the CAN bus 

lines between the combination meter or CAN box 
unit (MMCS) and the heater controller assembly 
(A/C-ECU), the power supply system to the com-
bination meter or CAN box unit (MMCS), the 
combination meter or CAN box unit (MMCS) 
itself, or the heater controller assembly 
(A/C-ECU) may be defective.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-17

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the heater controller assembly 
(A/C-ECU) and the combination meter or CAN 
box unit (MMCS), and the power supply system 
to the combination meter or CAN box unit 
(MMCS). For diagnosis procedures, refer to "How 
to treat past trouble" (Refer to GROUP 00 

− How 

to Treat Past Trouble ). 

NOTE: For a past trouble, you can not find it by the 

M.U.T.-III CAN bus diagnostics even if there is 
any failure in CAN bus lines. In this case, refer to 
GROUP 00, How to Cope with Intermittent Mal-
function  and check the CAN bus lines. You can 
narrow down the possible cause of the trouble by 
referring to the diagnosis code, which is set 
regarding the CAN communication-linked ECUs 
(Refer to GROUP 54C 

 CAN Bus Line Diagnos-

tic Flow ).

CAUTION

If the ignition switch is turned to the ON position 
without starting the engine, the diagnosis code 
U0184 (past trouble) may be set to the heater 
controller assembly (A/C-ECU) after three min-
utes.

PROBABLE CAUSES

• Damaged wiring harness or connectors

• Malfunction of the audio

• Malfunction of the heater controller assembly 

(A/C-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 lines (Refer to GROUP 
54C, Troubleshooting ). On completion, go 
to Step 6.

STEP 2. M.U.T.-III other system diagnosis code
Check whether the audio-related diagnosis code is 
set.

Q: Is the diagnosis code set?

YES : 

Diagnose the audio. Refer to .

NO : 

Go to Step 3

STEP 3. M.U.T.-III other system diagnosis code
Check if a diagnosis code, which relates to CAN 
communication-linked systems below, is set.

• Combination meter

U0245: AND CAN timeout

Q: Is the diagnosis code set?

YES : 

Go to Step 4

NO : 

Go to Step 5

STEP 4. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the combination meter or CAN box 

unit (MMCS), and then go to Step 6.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the combination meter or CAN box 
unit (MMCS) and the heater controller 
assembly (A/C-ECU) (Refer to GROUP 00 

− 

How to Cope with Intermittent Malfunction ).

STEP 5. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the heater controller assembly 

(A/C-ECU), and then go to Step 6. 

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the combination meter or CAN box 
unit (MMCS) and the heater controller 
assembly (A/C-ECU) (Refer to GROUP 00 

− 

How to Cope with Intermittent Malfunction ).

STEP 6. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Return to Step 1.

NO : 

The procedure is complete.

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-18

Code No. U1000: OSS CAN time-out

CAUTION

If diagnosis code No.U1000 is set in the heater 
controller assembly (A/C-ECU), diagnose the 
CAN main bus line.

CAUTION

Whenever the ECU is replaced, ensure that the 
communication circuit is normal.

TROUBLE JUDGMENT

The heater controller assembly (A/C-ECU) receives 
air conditioner control-related signals from the 
OSS-ECU via the CAN bus lines. If the ECU cannot 
receive any of the air conditioner control-related sig-
nals from the OSS-ECU, diagnosis code U1000 will 
be stored.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• Connector(s) or wiring harness in the CAN bus 

lines between the OSS-ECU and the heater con-
troller assembly (A/C-ECU), the power supply 
system to the OSS-ECU, the OSS-ECU itself, or 
the heater controller assembly (A/C-ECU) may 
be defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the heater controller assembly 
(A/C-ECU) and the OSS-ECU, and the power 
supply system to the OSS-ECU. For diagnosis 
procedures, refer to "How to treat past trouble" 
(Refer to GROUP 00 

− How to Treat Past Trouble 

). 

NOTE: For a past trouble, you can not find it by the 

M.U.T.-III CAN bus diagnostics even if there is 
any failure in CAN bus lines. In this case, refer to 
GROUP 00, How to Cope with Intermittent Mal-
function  and check the CAN bus lines. You can 
narrow down the possible cause of the trouble by 
referring to the diagnosis code, which is set 
regarding the CAN communication-linked ECUs 
(Refer to GROUP 54C 

 CAN Bus Line Diagnos-

tic Flow ).

CAUTION

If the ignition switch is turned to the ON position 
without starting the engine, the diagnosis code 
U0184 (past trouble) may be set to the heater 
controller assembly (A/C-ECU) after three min-
utes.

PROBABLE CAUSES

• Damaged wiring harness or connectors

• Malfunction of the audio

• Malfunction of the heater controller assembly 

(A/C-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 lines (Refer to GROUP 
54C, Troubleshooting ). On completion, go 
to Step 6.

STEP 2. M.U.T.-III other system diagnosis code
Check whether the audio-related diagnosis code is 
set.

Q: Is the diagnosis code set?

YES : 

Diagnose the audio. Refer to .

NO : 

Go to Step 3

STEP 3. M.U.T.-III other system diagnosis code
Check if a diagnosis code, which relates to CAN 
communication-linked systems below, is set.

• Combination meter

U1000: OSS CAN timeout

Q: Is the diagnosis code set?

YES : 

Go to Step 4

NO : 

Go to Step 5

STEP 4. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the OSS-ECU, and then go to Step 

6.

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the OSS-ECU and the heater 
controller assembly (A/C-ECU) (Refer to 
GROUP 00 

− How to Cope with Intermittent 

Malfunction ).

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-19

STEP 5. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the heater controller assembly 

(A/C-ECU), and then go to Step 6. 

NO : 

A poor connection, open circuit or other 
intermittent malfunction in the CAN bus line 
between the OSS-ECU and the heater 
controller assembly (A/C-ECU) (Refer to 
GROUP 00 

− How to Cope with Intermittent 

Malfunction ).

STEP 6. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) to ON
(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Return to Step 1.

NO : 

The procedure is complete.

Code No.U1190 No receive fault detect signal

TROUBLE JUDGMENT

ETACS-ECU sends the diagnosis code (U code) 
detection permission or prohibition signal to each 
ECU connected to the CAN bus line. If the heater 
controller assembly (A/C-ECU) cannot receive the 
diagnosis code (U code) detection permission or pro-
hibition signal for 5 seconds after turning the electric 
motor switch to ON position, diagnosis code U1190 
will be set.

PROBABLE CAUSES

• Malfunction of the ETACS-ECU

• Malfunction of CAN bus line

Code No.U1195 Coding not completed

CAUTION

• If the diagnosis code No. U1195 is set, diag-

nose the CAN bus lines.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSTIC FUNCTION

If the vehicle information data is not registered to the 
ETACS-ECU, the heater controller assembly 
(A/C-ECU) sets the diagnosis code No. U1195.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of combination meter

• Malfunction of the ETACS-ECU

Code No.U1199 Chassis No. not programmed

DIAGNOSTIC FUNCTION

If the chassis number is not written to the 
ETACS-ECU, the ETACS-ECU sets diagnosis code 
No.U1199.

PROBABLE CAUSES

• Chassis No. not programmed

• Malfunction of the ETACS-ECU

 

 

 

 

 

 

 

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