Mitsubishi Outlander GS45X. Manual — part 1341

SYMPTOM PROCEDURES

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ELECTRONIC CONTROL AWD

27C-87

STEP 2. Wiring harness check
NOTE: Prior to the wiring harness inspection, check the follow-
ing connectors for improper engagement, terminal damage or
terminal drawn in the connector case.

• C-128 AWD-ECU connector

• C-138 Intermediate connector

• D-113 Intermediate connector

Check the wiring harness between the C-128 AWD-ECU con-
nector (terminal No.1) and the D-119 electronic control coupling
solenoid connector (terminal No.2), and the wiring harness
between the C-128 AWD-ECU connector (terminal No.9) and
the D-119 electronic control coupling solenoid connector (termi-
nal No.1) for damage or other problem.
Q: Is the wiring harness in good condition?

YES : Go to Step 3.
NO : Repair damage or other problem in the wiring

harness. Then go to Step 7.

STEP 3. Scan tool MB991958 data list
Check the data list for the items below (Refer to

P.27C-90

).

• Item 10: FWD SW

• Item 11: LOCK SW

• Item 15: AWD mode

• Item 16: FL wheel speed sensor

• Item 17: FR wheel speed sensor

• Item 18: RL wheel speed sensor

• Item 19: RR wheel speed sensor

• Item 26: Throttle position

Q: Does the service data meet the standard value range?

YES : Go to Step 5.
NO (Item10 or 11) : Perform the troubleshooting of the drive

mode selector (refer to

P.27C-31

). Then go to Step 4.

NO (Item16 to 19) : Perform the troubleshooting of the ABS

system (Refer to GROUP 35B

−

Troubleshooting/DTC Chart

P.35B-15

<Vehicles with

ABS>), the ASC system (Refer to GROUP 35C

−

Troubleshooting/DTC Chart

P.35C-18

<Vehicles with

ASC>). Then go to Step 4.

NO (Item26) : Perform the troubleshooting of the engine

control system (Refer to GROUP 13A

−

Troubleshooting/DTC Chart

P.13A-49

<4B1>,

GROUP 13B

− Troubleshooting/DTC Chart

P.13B-50

<6B3>). Then go to Step 4.

SYMPTOM PROCEDURES

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ELECTRONIC CONTROL AWD

27C-88

STEP 4. Check for the tight corner braking phenomenon
occurrence during driving on a flat road
Check if the tight corner braking phenomenon occurs during
driving on a flat road with the drive mode selector being on the
FWD position.
Q: Does the tight corner braking phenomenon occur?

YES (Coil current is 0 A) : Measure the coil current when

the tight corner braking occurs. If the coil current
measures 0 A, replace the electronic control coupling
(Refer to

P.27C-97

). Then go to Step 5.

YES (Coil current is other than 0 A) : Measure the coil

current when the tight corner braking occurs. If the
coil current is other than 0 A, go to Step 5.

NO : The procedure is complete.

STEP 5. Retest the system.
Q: Does the malfunction occur again?

YES : Replace AWD-ECU (Refer to

P.27C-95

). Then go to

Step 6.

NO : The trouble can be an intermittent malfunction (Refer

to GROUP 00

− How to Use Troubleshooting/How to

Cope with Intermittent Malfunctions

P.00-15

).

STEP 6. Retest the system.
Q: Does the malfunction occur again?

YES : Replace the electronic control coupling (Refer to

P.27C-97

). Then go to Step 7.

NO : The procedure is complete.

STEP 7. Retest the system.
Q: Does the malfunction occur again?

YES : Diagnose again from Step 1.
NO : The procedure is complete.

SYMPTOM PROCEDURES

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ELECTRONIC CONTROL AWD

27C-89

Inspection Procedure 4: No DTC is set even when the AWD/LOCK Indicator Lights Flash.

.

COMMENTS ON TROUBLE SYMPTOM

• In case that the AWD/LOCK indicator flashes but

no DTC is set, the AWD-ECU power supply cir-
cuit system or AWD-ECU may have a problem.

• If the AWD-ECU power supply voltage is approxi-

mately 6.5 V or less when the system is in opera-
tion (always), the CPU of AWD-ECU
automatically shuts down. At this time, if the AWD
control is in operation, it switches to the FWD
control. AWD-ECU cannot set the DTC because
the CPU shuts down. In addition, the combination
meter determines the AWD-ECU time-out, and
flashes both AWD and LOCK indicators.

.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• AWD-ECU malfunction

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. Check if 4WD/LOCK Indicator Lights flash
simultaneously
(1) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(2) Check that the 4WD/LOCK indicator lights flash

simultaneously when the drive mode selector is switched to
4WD (AWD) position, or LOCK position.

Q: Does the 4WD/LOCK Indicator Lights flash

simultaneously?
YES :

• When the drive system fluid temperature warning

display illuminates in the combination meter, cool
down the electronic control coupling.

• When the drive system fluid temperature warning

display does not illuminate in the combination
meter, referring to "Inspection Procedure 1: Scan
tool MB991958 cannot Communicate with the
Electronic Control AWD System<ECU power
supply circuit system check> ", perform the check

P.27C-77

.

NO : Referring to the Inspection Chart for Trouble

Symptoms, perform the check

P.27C-76

.

DATA LIST REFERENCE TABLE

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ELECTRONIC CONTROL AWD

27C-90

DATA LIST REFERENCE TABLE

M1274001000149

Scan tool can read the following items among vari-
ous control data (input data from each ECU and
switch) used by the electronic control AWD system.

SYSTEM IS NORMAL.

Item No.

Check item

Check condition

Normal condition

01

Vehicle speed
(AWD calculated
value)

Perform a test run of the vehicle.

The speedometer
display and the
scan tool display
almost agree with
each other.

02

Ignition power
supply voltage

Ignition switch: ON

9

− 16 V

03

Coupling torque

• Drive mode selector: 4WD (AWD)

• Perform a test run of the vehicle.

0

− 730 N⋅m

(0

− 538 ft-lb)

04

Coupling current
(command
value)

• Drive mode selector: 4WD (AWD)

• Perform a test run of the vehicle.

The current
changes between
0 and 3 A.
(Command value
and actual value
agree with each
other.)

05

Coupling current
(monitor value)

• Drive mode selector: 4WD (AWD)

• Perform a test run of the vehicle.

The current
changes between
0 and 3 A.
(Command value
and actual value
agree with each
other.)

06

Coupling
temperature

• Drive mode selector: 4WD (AWD)

• Perform a test run of the vehicle.

0

− 200°C

(0

− 392°F)

NOTE: Due to
road surface
condition the load
to coupling varies,
thus the
temperature
indication
changes.

07

CAN system
(ABS/ASC)

Ignition switch:
ON

When ABS/ASC-ECU data is correctly
received

OK

When ABS/ASC-ECU data reception
error occurs

No reception

08

CAN system
(engine)

Ignition switch:
ON

When engine control module data is
correctly received

OK

When engine control module data
reception error occurs

No reception