Mitsubishi Outlander GS45X. Manual - part 996

 

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Mitsubishi Outlander GS45X. Manual - part 996

 

 

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-11

DIAGNOSTIC TROUBLE CODE CHART

M1554004902180

CAUTION

During diagnosis, a DTC code associated with 
other system may be set when the ignition switch 
is turned on with connector(s) disconnected. On 
completion of repairs, check all systems for DTC 
code(s). If DTC code(s) are set, erase them all.

NOTE: The diagnostic trouble codes marked by * are 
set from the ETACS-ECU.

Diagnostic 
trouble code No.

Diagnostic item

Reference 
page

B1000

Control panel communication error

P.55A-12

B1003

Mode dial SW error

P.55A-16

B1018

Temperature control dial SW error

P.55A-20

B1021

Fan dial SW error

P.55A-23

B1031

Air thermo sensor system (short circuit)

P.55A-26

B1032

Air thermo sensor system (open circuit)

P.55A-26

B1034*

Ambient air temperature sensor system (short circuit)

P.55A-29

B1035*

Ambient air temperature sensor system (open circuit)

P.55A-29

B1079

Refrigerant leaks

P.55A-32

B2214

Control panel failure

P.55A-36

B223B

Control panel improperly assembled

P.55A-39

U1415

Coding not completed

P.55A-39

U0019

Bus off (CAN1)

P.55A-44

U0141

ETACS-ECU time-out

P.55A-45

U0151

SRS-ECU time-out

P.55A-47

U0154

Occupant classification-ECU time-out

P.55A-49

U0155

Combination meter time-out

P.55A-52

U0168

WCM time-out

P.55A-54

U0184

Audio time-out

P.55A-57

U0195

Satellite radio tuner time-out

P.55A-59

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-12

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC B1000: Control Panel Communication Error

.

DTC SET CONDITION

DTC B1000 will be set when the communication 
between A/C-ECU and A/C control panel cannot be 
performed.

.

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.

AC901217

A/C-ECU

CPU

POWER 
SUPPLY

INTERFACE 
CIRCUIT

A/C 
CONTROL 
PANEL

ETACS-ECU

AC702208

Connector: C-109, C-119

C-119

C-109 (B) 

AE

AC701632 AM

Connector: C-317

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-13

Past trouble

• If DTC B1000 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.)

• 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.
Use scan tool MB991958 to diagnose the CAN bus lines.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result satisfactory?

YES : Go to Step 2.
NO :  Repair the CAN bus lines. Repair the CAN bus lines 

(Refer to GROUP 54C, Diagnosis-Can Bus 
Diagnostic Chart 

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. 

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-14

STEP 3. Check A/C control panel connector C-119 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is A/C control panel connector C-119 in good condition?

YES : Go to Step 4.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

.

STEP 4. Measure the voltage at A/C control panel 
connector C-119. 
(1) Disconnect A/C control panel connector C-119, and 

measure the voltage at the harness side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 6 and ground.

• The measured value should be approximately 12 volts 

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts?

YES :  Go to Step 6.
NO :   Go to Step 5.

STEP 5. Check the wiring harness between A/C control 
panel connector C-119 (terminal 6) and ETACS-ECU 
connector C-317 (terminal 5).

• Check the A/C control panel power supply line for open cir-

cuit.

Q: Is the wiring harness between A/C control panel 

connector C-119 (terminal 6) and ETACS-ECU connector 
C-317 (terminal 5) in good condition?
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 :  Repair the wiring harness.

AC608254BSS

Harness side: C-119

 

 

 

 

 

 

 

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