Mitsubishi Outlander GS45X. Manual — part 1338

DIAGNOSIS

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ELECTRONIC CONTROL AWD

27C-75

DIAGNOSIS

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 2.
NO : Repair the CAN bus line (Refer to GROUP 54C

−

Troubleshooting/CAN Bus Diagnostics Table

P.54C-17

). Then go to Step 4.

STEP 2. Scan tool MB991958 DTC of other systems
Use M.U.T.-III to check that the DTC B222C is set in the
ETACS-ECU.
Q: Is the DTC set?

YES : Troubleshoot the relevant diagnostic trouble code,

and then go to Step 4.

NO : Go to Step 3.

STEP 3. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to

the "ON" position.

(3) Check if the DTC is set.
Q: Is the DTC U1415 set?

YES : Replace AWD-ECU (Refer to

P.27C-95

). Then go to

Step 4 .

NO : The trouble can be an intermittent malfunction such

as loose connector fit, wiring harness open circuit
(Refer to GROUP

− How to Use Troubleshooting/How

to Cope with Intermittent Malfunctions

P.00-15

).

STEP 4. Check whether the DTC is reset.
Q: Is the DTC U1415 set?

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

TROUBLE SYMPTOM CHART

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ELECTRONIC CONTROL AWD

27C-76

TROUBLE SYMPTOM CHART

M1274000900075

CAUTION

During diagnosis, a DTC associated with other
system may be set when the ignition switch is
turned on with connector(s) disconnected. On
completion, confirm all systems for DTC(s). If
DTC(s) are set, erase them all.

NOTE:

*

Tight corner braking phenomenon: When a

AWD vehicle makes sharp cornering in a paved road
at low speed (ex. parallel parking), there is a differ-
ence in turning radius between front and rear wheels.
If such a difference can no longer be compensated
by tire slippage, the vehicle behaves as if it is under
braking.

Trouble symptom

Inspection
procedure

Reference pages or
actions

Scan tool MB991958 cannot communicate with the
electronic control AWD system.

1

P.27C-77

The switch position of the drive mode selector does not
match with the indicator display in the combination meter.

2

P.27C-80

The tight corner braking phenomenon

*

appears with the

drive mode selector in the FWD or AWD position.
NOTE: The vehicle is tuned so that the tight corner braking
phenomenon appears at a certain level with the drive mode
selector in the LOCK position.

3

P.27C-85

No DTC is set even when the AWD/LOCK indicator lamps
flash.

4

P.27C-89

SYMPTOM PROCEDURES

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ELECTRONIC CONTROL AWD

27C-77

SYMPTOM PROCEDURES

Inspection Procedure 1: Scan tool MB991958 cannot Communicate with the Electronic Control AWD
System.

ETACS-ECU

FUSIBLE
LINK

34

IGNITION
SWITCH (IG1)

IG1
RELAY

AWD-ECU

ACA02791

SYMPTOM PROCEDURES

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ELECTRONIC CONTROL AWD

27C-78

.

COMMENTS ON TROUBLE SYMPTOM

If scan tool MB991958 cannot communicate with the
electronic control AWD system, the CAN bus lines
may have a problem. If the electronic control AWD
system is not in operation (in case of no AWD opera-
tion), the AWD-ECU power supply circuit system or
AWD-ECU may have a problem.

.

TROUBLESHOOTING HINTS

• 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. 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 2.
NO : Repair the CAN bus line (Refer to GROUP 54C

−

Troubleshooting/CAN Bus Diagnostics Table

P.54C-17

). On completion, go to Step 2.

STEP 2. Check the following connector:
Check the connectors below for improper engagement, termi-
nal damage or terminal drawn in the connector case.

• C-128 AWD-ECU connector

• C-309, C-313 ETACS-ECU connector

• C-138 intermediate connector

Q: Are the connectors and terminals in good condition?

YES : Go to Step 3.
NO : Repair the connector(s) or terminal(s). Then go to

Step 8.

AC901227AC

C-128

C-138

Connectors: C-128, C-138

AC901228AC

C-313
(BR)

C-309
(B)

ETACS-ECU
(front view)

Connectors: C309, C-313