Mitsubishi Outlander GS45X. Manual — part 118

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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 ETACS-ECU
diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU (Refer to

P.54A-732

).

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/C
diagnostic trouble code.
Check if DTC U0141 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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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 ETACS-ECU.
NO : The trouble can be an intermittent malfunction such

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

P.00-15

).

DTC U0151: SRS-ABG CAN timeout

CAUTION

• If DTC U0151 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 SRS-ECU cannot be received, the
CAN box unit sets DTC U0151.

.

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 SRS-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 SRS-ECU may be defective

• The CAN box unit may be defective

DIAGNOSIS

Required Special Tools:

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

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• 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 SRS-ECU
diagnostic trouble code
Check again if the DTC is set to the SRS-ECU.
Q: Is the DTC set?

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

Troubleshooting

P.52B-31

).

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/C-ECU
diagnostic trouble code.
Check if the DTC U0151 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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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 SRS-ECU.
NO : The trouble can be an intermittent malfunction such

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

P.00-15

).

DTC U0154: OCM (occupant classification-ECU) CAN timeout

CAUTION

If DTC U0154 is set, be sure to diagnose the CAN
bus line.

CAUTION

When replacing the CAN box unit, always check
that the communication circuit is normal. (Check
that the voltage is 10 V or more.)

.

DIAGNOSTIC FUNCTION

When the signals from occupant classification-ECU
cannot be received, the CAN box unit sets DTC
U0154.

.

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 occupant classifica-
tion-ECU 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 occupant classification-ECU may be defec-

tive.