Mitsubishi Outlander GS45X. Manual - part 1008

MANUAL A/C DIAGNOSIS

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HEATER, AIR CONDITIONING AND VENTILATION

55A-59

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES : A poor connection, open circuit or other intermittent 

malfunction is present in the lines between the audio 
and the A/C-ECU (Refer to GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.)

NO :  Replace the Audio. On completion, check that the 

DTC is not reset.

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

YES : A poor connection, open circuit or other intermittent 

malfunction is present in the lines between the audio 
and the A/C-ECU (Refer to GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.)

NO :  Replace the A/C-ECU. On completion, check that the 

DTC is not reset.

DTC U0195: Satellite radio tuner Time-out

CAUTION

If DTC U0195 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 air conditioning opera-
tion-related signals from the satellite radio tuner via 
the CAN bus lines. If any of the air conditioning con-
trol-related signals from the satellite radio tuner can-
not be received, the diagnostic trouble code U0195 is 
stored.

.

TECHNICAL DESCRIPTION (COMMENT) 

Current trouble

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

lines between the Satellite radio tuner and the 
A/C-ECU, the power supply system to the Satel-
lite radio tuner, the Satellite radio tuner itself, or 
the A/C-ECU may be defective.

Past trouble

• If DTC U0195 is stored as a past trouble, carry 

out diagnosis with particular emphasis on wiring 
and connector(s) in the CAN bus line between 
the A/C-ECU and the Satellite radio tuner, and 
the power supply system to the Satellite radio 
tuner. If the connectors and wiring are normal, 
and obviously the ECU is the cause of the trou-
ble, replace the ECU. If in doubt, do not replace 
the ECU.

MANUAL A/C DIAGNOSIS

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HEATER, AIR CONDITIONING AND VENTILATION

55A-60

NOTE: For a past trouble, you cannot find it by 
the scan tool CAN bus diagnostics even if there is 
a failure in CAN bus lines. In this case, refer to 
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points 

−

 How to Cope with Intermit-

tent Malfunctions 

P.00-15

) and check the CAN 

bus lines. You can narrow down the possible 

cause of the trouble by referring to the DTC, 
which is set regarding the CAN communica-
tion-linked ECUs (Refer to GROUP 54C, Expla-
nation about the scan too CAN bus diagnostics 

P.54C-16

).

.

TROUBLESHOOTING HINTS

• Malfunction of the Satellite radio tuner

• Malfunction of the A/C-ECU

• Damaged harness wires and connectors

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

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

MANUAL A/C DIAGNOSIS

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STEP 2. Using scan tool MB991958 read the Satellite radio 
tuner diagnostic trouble code.
Check whether an Satellite radio tuner DTCs are set or not.
(1) Turn the ignition switch to the "ON" position.
(2) Check for Satellite radio tuner DTCs.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES :  Go to Step 3.
NO :  Diagnose the Satellite radio tuner (Refer to GROUP 

54A, Diagnostic Trouble Code 

P.54A-333

).

STEP 3. Using scan tool MB991958, check for any 
diagnostic trouble code.
Check if a DTC, which relates to CAN communication-linked 
systems below, is set.

• ETACS-ECU

DTC indicating a time-out error related to the Satellite radio 
tuner system

(1) Turn the ignition switch to the "ON" position.
(2) Check for a DTC related to the relevant system.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES : Go to Step 5.
NO :  Go to Step 4.

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES : A poor connection, open circuit or other intermittent 

malfunction is present in the lines between the 
Satellite radio tuner and the A/C-ECU (Refer to 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.)

NO :  Replace the Satellite radio tuner. On completion, 

check that the DTC is not reset.

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-62

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

YES : A poor connection, open circuit or other intermittent 

malfunction is present in the lines between the 
Satellite radio tuner and the A/C-ECU (Refer to 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.)

NO :  Replace the A/C-ECU. On completion, check that the 

DTC is not reset.