Mitsubishi Outlander XL. Manual — part 563

Past trouble

｠

Tire with incorrect diameter (high-pressure type
spare tire or flat tire) has been installed.

｠

The tire pressure has been adjusted due to
improper tire pressure.

DIAGNOSIS

｠

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

｠

MB991824: Vehicle Communication Interface

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

STEP 1. Scan tool MB991958 CAN bus diagnostics
Use scan tool MB991958 to diagnose the CAN bus lines.

Q:Is the check result normal?

YES:

Go to Step 3.

NO:

Repair the CAN bus line. (Refer to GROUP 54D - CAN

bus diagnostic chart P.54D-17.) On completion, go to
Step 2.

STEP 2. Check whether the DTC is reset after repairing the
CAN bus line.

(1)

Erase the DTC.

(2)

Drive the vehicle straight with throttle opening angle of
approximately 50% or less, and constant vehicle speed of 30
km/h or higher for 1 minute or longer.

(3)

Check if the DTC is set.

Q:Is the DTC No. C1078 set?

YES:

Go to Step 3.

NO:

This diagnosis is complete.

STEP 3. Tire check

Q:Are all installed wheels and tires same in size?

YES:

Go to Step 4.

NO:

Install the same size wheels and tires. Then go to

Step 4.

STEP 4. Tire pressure check
Check that the tire pressure of the installed tires agrees with the
tire pressure specified on the tire pressure label.

Q:Is the tire pressure normal?

YES:

Go to Step 5.

NO:

Adjust the tire pressure. Then go to Step 5.

STEP 5. Check whether the DTC is reset.
Drive the vehicle straight with throttle opening angle of
approximately 50% or less, and constant vehicle speed of 30
km/h or higher for 1 minute or longer.

Q:Is the DTC No. C1078 set?

YES:

Go to Step 6.

NO:

This code is set because the tire pressure was

improper or a tire with incorrect diameter is installed.

ELECTRONIC CONTROL AWD

27C-11

DIAGNOSIS

STEP 6. Scan tool MB991958 data list
Check the following service data. (Refer to P.27C-87.)

｠

Item 16: FL wheel speed sensor

｠

Item 17: FR wheel speed sensor

｠

Item 18: RL wheel speed sensor

｠

Item 19: RR wheel speed sensor

Q:Is the check result normal?

YES:

The trouble can be an intermittent malfunction.

(Refer to GROUP 00 - How to cope with Intermittent
Malfunction P.00-15.)

NO:

Troubleshoot the ABS system. (Refer to GROUP 35B -

Troubleshooting P.35B-9.) Then go to Step 7.

STEP 7. Check whether the DTC is reset.
Drive the vehicle straight with throttle opening angle of
approximately 50% or less, and constant vehicle speed of 30
km/h or higher for 1 minute or longer.

Q:Is the DTC No. C1078 set?

YES:

Replace AWD-ECU. (Refer to P.27C-92.) Then go to

Step 8.

NO:

This diagnosis is complete.

STEP 8. Check whether the DTC is reset.

Q:Is the DTC No. C1078 set?

YES:

Diagnose again from Step 1.

NO:

This diagnosis is complete.

27C-12

ELECTRONIC CONTROL AWD

DIAGNOSIS

DTC C1456: Wiring harness or coupling coil overcurrent failure

M12704100013USA0000010000

ETACS-
ECU

FUSIBLE
LINK

34

AWD-ECU

ELECTRONIC
CONTROL
COUPLING
SOLENOID

D7G27M000A00

GRA

Y

BLUE

YELLO

W

GRA

Y

WHITE

C-309

C-31

C-128

D-113

D-119

YELLO

W

BLUE

ZC6000240000

Connectors: C-31, C-128

C-128

C-31

ZC6000250000

Connector: D-113

D-113

ZC6000260000

ETACS-ECU
(front view)

C-315

C-309
(B)

Connectors: C-309, C-315

ELECTRONIC CONTROL AWD

27C-13

DIAGNOSIS

If there is any problem in the CAN bus lines, an
incorrect DTC may be set. Prior to this diagnosis,
always diagnose the CAN bus lines.

OPERATION
The current flowing the coupling coil is monitored, and
if it exceeds the specified value, the system is
deactivated.

DTC SET CONDITIONS
If the following conditions are met when the system is
in operation (always), AWD-ECU switches the control
from AWD to FWD, flashes the AWD/LOCK indicators
alternately, and sets the DTC No. C1456.

｠

Electronic control coupling solenoid current monitor
value: 6 A or more (deviated from the normal current
value range)

TROUBLESHOOTING HINTS

Current trouble

｠

Damaged harness wires and connector (Short to
earth between AWD-ECU and the electronic control
coupling solenoid)

｠

AWD-ECU internal error

｠

Short circuit in the coupling coil

Past trouble

｠

Intermittent wiring harness or connector failure

NOTE:

For diagnosis procedures, refer to "How

to treat past trouble". (Refer to GROUP 00, How
to Treat Past Trouble P.00-17.)

｠

Intermittent electronic control coupling failure
(solenoid failure)

DIAGNOSIS

｠

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

｠

MB991824: Vehicle Communication Interface

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

STEP 1. Scan tool MB991958 CAN bus diagnostics
Use scan tool MB991958 to diagnose the CAN bus lines.

Q:Is the check result normal?

YES:

Go to Step 3.

NO:

Repair the CAN bus line. (Refer to GROUP 54D - CAN

bus diagnostic chart P.54D-17.) On completion, go to
Step 2.

STEP 2. Check whether the DTC is reset after repairing the
CAN bus line.

(1)

Erase the DTC.

(2)

Turn the ignition switch from the LOCK (OFF) position to the
ON position.

(3)

Use scan tool MB991958 to activate the electronic control
coupling to the maximum AWD control torque. (Refer to
Actuator Test Table P.27C-89.)

(4)

Check if the DTC is set.

Q:Is the DTC No. C1456 set?

YES:

Go to Step 3.

NO:

This diagnosis is complete.

STEP 3. Scan tool MB991958 data list
Check the following service data. (Refer to P.27C-87.)

｠

Item 04: Coupling current command value

｠

Item 05: Coupling current monitor value

27C-14

ELECTRONIC CONTROL AWD

DIAGNOSIS