Mitsubishi Outlander GS45X. Manual — part 119

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CHASSIS ELECTRICAL

54A-473

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-458

."

(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 occupant
classification-ECU diagnostic trouble code.
Check if DTC is set to the occupant classification-ECU.
Q: Is the DTC set?

YES : Troubleshoot the SRS (Refer to GROUP 52B,

Diagnosis

P.52B-344

).

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/C-ECU
diagnostic trouble code.
Check if the DTC U0154 is set to the A/C-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

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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 occupant classification-ECU.
NO : The trouble can be an intermittent malfunction such

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

P.00-15

).

DTC U0155: Meter CAN timeout

CAUTION

• If DTC U0155 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

When the signals from combination meter cannot be
received, the CAN box unit sets DTC U0155.

.

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 combination meter 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 combination meter may be defective.

DIAGNOSIS

Required Special Tools:

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

MMCS

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CHASSIS ELECTRICAL

54A-475

• 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.54A-458

."

(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 combination
meter diagnostic trouble code.
Check whether a combination meter DTCs are set or not.
(1) Turn the ignition switch to the "ON" position.
(2) Check for combination meter DTCs.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the combination meter (Refer to

combination meter, Diagnosis

P.54A-34

).

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/C-ECU
diagnostic trouble code.
Check if the DTC U0155 is set to the A/C-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-476

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 combination meter.
NO : The trouble can be an intermittent malfunction such

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

P.00-15

).

DTC U0164: A/C CAN timeout

CAUTION

• If DTC U0164 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 A/C-ECU cannot be received, the
CAN box unit sets DTC U0164.

.

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 communication with A/C-ECU cannot be estab-
lished for 2,500 ms or more, the CAN box unit deter-
mines that a problem has occurred.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective.

• The A/C-ECU may be defective.

• The CAN box unit may be defective.

DIAGNOSIS

Required Special Tools:

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