Mitsubishi Outlander XL. Manual — part 1136

(1)

Disconnect the scan tool and ETACS-ECU connector C-301,
and check the wiring harness.

(2)

Check the wiring harness between data link connector C-125
(terminal No.6) and ETACS-ECU connector C-301 (terminal
No.5) <CAN_H>

(3)

Check the wiring harness between data link connector C-125
(terminal No.14) and ETACS-ECU connector C-301
(terminal No.4) <CAN_L>

Q:Is the wiring harness between data link connector C-125

and ETACS-ECU connector C-301 in good condition?

YES:

Go to Step 3.

NO:

Repair the wiring harness between data link connector

C-125 and ETACS-ECU connector C-301.

STEP 3. Check the wiring harness between data link
connector C-125 and ETACS-ECU connector C-301 for a
short to ground. Measure the resistance at data link
connector C-125.

Disconnect the negative battery terminal. For details refer
to P.54D-8.

A digital multimeter should be used. For details refer to P.
54D-8.

The test wiring harness should be used. For details refer
to P.54D-8.

(1)

Disconnect the scan tool and ETACS-ECU connector C-301,
and measure the resistance at the wiring harness side of data
link connector C-125.

ZC5010410000

Harness side: C-125

Test harness

(2)

Measure the resistance between data link connector terminal
6 and body ground. <CAN_H>

OK: 1 kiloohm or more

CONTROLLER AREA NETWORK (CAN)

54D-27

DIAGNOSIS

ZC5010410001

Harness side: C-125

Test harness

(3)

Measure the resistance between data link connector terminal
14 and body ground. <CAN_L>

OK: 1 kiloohm or more

Q:Do all the resistances measure 1 kiloohm or more?

YES:

Go to Step 4.

NO:

Repair the wiring harness between data link connector

C-125 and ETACS-ECU connector C-301.

STEP 4. Check the wiring harness between data link
connector C-125 and ETACS-ECU connector C-301 for a
short to the power supply. Measure the voltage at data link
connector C-125.

(1)

Disconnect the scan tool and ETACS-ECU connector C-301,
and measure the resistance at the wiring harness side of data
link connector C-125.

(2)

Turn the ignition switch to the "ON" position.

ZC5010400000

Harness side: C-125

Test harness

(3)

Measure the voltage between data link connector terminal 6
and body ground. <CAN_H>

OK: 5 volts or less

ZC5010400001

Harness side: C-125

Test harness

(4)

Measure the voltage between data link connector terminal 14
and body ground. <CAN_L>

OK: 5 volts or less

Q:Do all the voltage measure 5 volts or less?

YES:

Go to Step 5.

NO:

Repair the wiring harness between data link connector

C-125 and ETACS-ECU connector C-301.

STEP 5. Check the wiring harness between data link
connector C-125 and ETACS-ECU connector C-301 for line-
to-line short. Measure the resistance at data link connector
C-125.

(1)

Disconnect the scan tool and ETACS-ECU connector C-301,
and measure the resistance at the wiring harness side of data
link connector C-125.

54D-28

CONTROLLER AREA NETWORK (CAN)

DIAGNOSIS

ZC5010390000

Test
harness

Test
harness

Harness side: C-125

(2)

Measure the resistance between data link connector terminal
6 and 14.

OK: Continuity exists (2 ohm or less)

Q:Do the resistance measure 2 ohm or less?

YES:

Go to Step 6.

NO:

Repair the wiring harness between data link connector

C-125 and ETACS-ECU connector C-301.

STEP 6. Using scan tool MB991958, diagnose the CAN bus
line.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Turn the ignition switch to the "ON" position.

ZC5018690000

: Red section on scree n

M. U . T .

J/C (3)

J/C (2)

SAS

4WD

K OS/WC

M

SRS

OCM

A/C

A UDI O

MMCS

Sat Radio

HFM

METER

ABS/ASC

A T

ENGINE

E T A C S

J/C (1)

(3)

Diagnose CAN bus lines, and check if the scan tool screen
is as shown in the illustration.

Q:Does the scan tool screen correspond to the illustration?

YES:

The trouble can be an intermittent malfunction

(Refer to GROUP 00, How to use Troubleshooting/inspection
Service Points - How to Cope with Intermittent
Malfunction P.00-15).

NO:

Replace the ETACS-ECU.

DIAGNOSTIC ITEM 2: Malfunction of the ETACS-ECU.

M15408300007USA0000010000

When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted

water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.

CONTROLLER AREA NETWORK (CAN)

54D-29

DIAGNOSIS

FUNCTION
When the CAN bus diagnosis is carried out, the scan
tool sets communication "OK" flags in the patch
between the ETACS-ECU and active other ECUs. If a
commutation "OK" flag is not set for the ECUs other
than the ETACS-ECU, this diagnosis result will be set.

TROUBLE JUDGEMENT CONDITIONS
If no communication flags are set for the ECUs (on the
CAN-B or CAN-C lines) other than the ETACS-ECU,
the ETACS-ECU determines that there is a failure.

TROUBLESHOOTING HINT

｠

Malfunction of the ETACS-ECU

DIAGNOSIS

Required Special Tools:

｠

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

Recheck for other system diagnostic trouble code.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.
Check whether ETACS-ECU-related DTC is set.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Turn the ignition switch to the "ON" position.

(3)

Check if the DTC is set.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the DTC set?

The DTC other than the U code is set.:

Troubleshoot the

ETACS-ECU. Refer to GROUP 54Ad, ETACS-ECU P.54Ad-8.

Only U-code DTC is set.:

Check the power supply circuit

of the ETACS-ECU. Refer to GROUP 54Ad, ETACS-ECU P.
54Ad-8.

The DTC is not set.:

Check the power supply circuit of the

ETACS-ECU. Refer to GROUP 54Ad, ETACS-ECU P.54Ad-8.

DIAGNOSTIC ITEM 3: Abnormal short between the CAN-C bus lines.

M15408300008USA0000010000

When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted

water pipe. If you fail to do so, a component
connected to the CAN bus line may be damaged.

54D-30

CONTROLLER AREA NETWORK (CAN)

DIAGNOSIS