Mitsubishi Outlander GS45X. Manual — part 120

MMCS

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CHASSIS ELECTRICAL

54A-477

• MB991824: Vehicles 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.

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.54A-460

."

(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 A/C-ECU
diagnostic trouble code.
Check if DTC is set to the A/C-ECU.
Q: Is the DTC set?

YES : Troubleshoot the A/C. (Refer to GROUP 55A, Manual

A/C Diagnosis

P.55A-11

GROUP 55B, Auto A/C

Diagnosis

P.55B-8

.)

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the ETACS
diagnostic trouble code.
Check if the DTC U0164 is set to the ETACS-ECU.
Q: Is the DTC set?

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

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

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CHASSIS ELECTRICAL

54A-478

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the CAN box unit.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the A/C-ECU.
NO : The trouble can be an intermittent malfunction such

as a poor connection or open circuit in the CAN bus
lines between the A/C-ECU and the CAN box unit
(Refer to GROUP 00, How to Cope with Intermittent
Malfunction

P.00-15

).

STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the CAN box unit.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the CAN box unit.
NO : The trouble can be an intermittent malfunction such

as a poor connection or open circuit in the CAN bus
lines between the A/C-ECU and the CAN box unit
(Refer to GROUP 00, How to Cope with Intermittent
Malfunction

P.00-15

).

DTC U0168: WCM/KOS CAN timeout

CAUTION

• If DTC U0168 is set, be sure to diagnose the

CAN bus line.

• When replacing the CAN box unit, always

check that the communication circuit is nor-
mal. (Check that the voltage is 10 V or more.)

.

DIAGNOSTIC FUNCTION

If the signal from KOS-ECU <vehicles with KOS> or
WCM <vehicles with WCM> cannot be received, the
CAN box unit sets DTC U0168.

.

JUDGMENT CRITERIA

With the ignition switch in the ON position, system
voltage between 10

− 16 V (data from ETACS-ECU),

power supply fuse(IOD fuse) is OK, or odometer
value is 80.5 km (50 miles) or more, and the commu-
nication with KOS-ECU <vehicles with KOS> or
WCM <vehicles with WCM> cannot be established
for 2,500 ms or more, the CAN box unit determines
that a problem has occurred.

.

TROUBLESHOOTING HINTS

• Malfunction of CAN bus line may be defective.

• Malfunction of the KOS-ECU may be defective.

<vehicles with KOS>

• Malfunction of the WCM may be defective. <vehi-

cles with WCM>

• Malfunction of CAN box unit may be defective.

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CHASSIS ELECTRICAL

54A-479

DIAGNOSIS

Required Special Tools:

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

• MB991824: Vehicles 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.

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.54A-31

."

(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 KOS-ECU
<vehicles with KOS> or WCM <vehicles with WCM>
diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU <vehicles with
KOS> or WCM <vehicles with WCM>.
Q: Is the DTC set?

YES : Troubleshoot the KOS or WCM (Refer to GROUP

42B, Diagnosis

P.42B-35

<KOS> or GROUP 42C,

Diagnosis

P.42C-18

<WCM>).

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the diagnostic
trouble code.
Check if the DTC U0168 is set to the ETACS-ECU.
Q: Is the DTC set?

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

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

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CHASSIS ELECTRICAL

54A-480

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the CAN box unit.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the WCM or KOS-ECU.
NO : The trouble can be an intermittent malfunction such

as a poor connection or open circuit in the CAN bus
lines between the WCM or KOS-ECU and the CAN
box unit (Refer to GROUP 00, How to Cope with
Intermittent Malfunction

P.00-15

).

STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the CAN box unit.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the CAN box unit.
NO : The trouble can be an intermittent malfunction such

as a poor connection or open circuit in the CAN bus
lines between the WCM or KOS-ECU and the CAN
box unit (Refer to GROUP 00, How to Cope with
Intermittent Malfunction

P.00-15

).

DTC U0195: Satellite radio CAN timeout

CAUTION

If DTC U0195 is set in the CAN box unit, diagnose
the CAN main bus line.

CAUTION

Whenever the CAN box unit is replaced, ensure
that the communication circuit is normal. (Check
that the voltage is 10 V or more.)

.

DIAGNOSTIC FUNCTION

When the signals from satellite radio tuner cannot be
received, the CAN box unit sets DTC U0195.

.

JUDGMENT CRITERIA

With the ignition switch in the ON position, system
voltage between 10

− 16 volts (data from

ETACS-ECU), power supply fuse(IOD fuse) is OK, or
odometer value is 80.5 km (50 miles) or more, and
the communications with satellite radio tuner cannot
be established for 2,500 ms or more, the CAN box
unit determines that a problem has occurred.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective.

• The CAN box unit may be defective.

• The satellite radio tuner may be defective.

DIAGNOSIS

Required Special Tools:

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