Mitsubishi Outlander GS45X. Manual - part 1003

 

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Mitsubishi Outlander GS45X. Manual - part 1003

 

 

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-39

DTC B223B: Control Panel Improperly Assembled

.

DTC SET CONDITION

DTC B223B will be set when the A/C control panel 
sends an abnormal data, the A/C control panel for 
RHD is improperly assembled, or the ETACS-ECU 
sends incorrect vehicle information (information for 
RHD is sent).

.

TECHNICAL DESCRIPTION (COMMENT)

Current trouble

• The A/C-ECU, the A/C control panel, or connec-

tor(s) or wiring between the two may be defec-
tive.

Past trouble

• If DTC B223B is stored as a past trouble, carry 

out diagnosis with particular emphasis on wiring 
and connector(s) between the A/C-ECU and the 
A/C control panel. If the connectors and wiring 
are normal, and obviously the ECU is the cause 
of the trouble, replace the ECU. If in doubt, do not 
replace the ECU.

.

TROUBLESHOOTING HINT

• Malfunction of connector.

• Malfunction of the harness.

• Malfunction of the A/C control panel.

• Malfunction of the A/C-ECU.

DIAGNOSIS

Required Special Tool:

•  MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

AC901231

A/C-ECU

CPU

A/C Control Panel Circuit

INTERFACE 
CIRCUIT

A/C 
CONTROL 
PANEL

AC702208

Connector: C-109, C-119

C-119

C-109 (B) 

AE

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-40

• 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

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) 

P.55A-7

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.
NO :  Repair the CAN bus line. (Refer to GROUP 54C, 

Diagnosis 

P.54C-17

).

STEP 2. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to "ON" position.
(3) Check if the DTC is set.
Q: Is the check result satisfactory?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

NO :  Go to Step 3. 

STEP 3. Check A/C control panel connector C-119 and 
A/C-ECU connector C-109 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are A/C control panel connector C-119 and A/C-ECU 

connector C-109 in good condition?
YES : 
Go to Step 4.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-41

STEP 4. Check the wiring harness between A/C-ECU 
connector C-109 (terminal 9) and A/C control panel 
connector C-119 (terminal 9).

• Check the A/C control panel signal line for open and short 

circuit.

Q: Is the wiring harness between A/C-ECU connector 

C-109 (terminal 9) and A/C control panel connector 
C-119 (terminal 9) in good condition?
YES : 
Go to Step 5.
NO :  Repair the wiring harness.

STEP 5. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to "ON" position.
(3) Check if the DTC is set.
Q: Is the check result satisfactory?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

NO :  Replace the A/C control panel. Then go to Step 6.

STEP 6. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to "ON" position.
(3) Check if the DTC is set.
Q: Is the check result satisfactory?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

NO :  Replace the A/C-ECU.

DTC U1415:Coding Not Completed

CAUTION

If DTC U1415 is set in the 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 A/C-ECU receives the vehicle information sig-
nals from the ETACS-ECU via the CAN bus lines. If 
incorrect global coding data is received or coding 
data cannot be received with the ignition switch 
turned ON when the coding confirmation is com-
pleted, the diagnostic trouble code U1415 is stored.

.

TROUBLESHOOTING HINTS

• Malfunction of the ETACS-ECU

• Malfunction of the A/C-ECU

• Damaged harness wires and connectors

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-42

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

•  MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line

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) 

P.55A-7

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.
NO :  Repair the CAN bus line. (Refer to GROUP 54C, 

Diagnosis 

P.54C-17

).

STEP 2. Using scan tool MB991958 read the ETACS-ECU 
diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.
(1) Turn the ignition switch to the "ON" position.
(2) Check for the DTC related to the ETACS-ECU.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES :  Go to Step 3.
NO :   Diagnose the ETACS-ECU (Refer to GROUP 54A, 

Diagnostic Trouble Code 

P.54A-733

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

 

 

 

 

 

 

 

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