Mitsubishi Outlander XL. Manual - part 579

Trouble symptom

Inspection
procedure

Reference

 pages

 or

actions

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

4

 P.27C-86

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
difference 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.

SYMPTOM PROCEDURES

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

M12704100031USA0000010000

ETACS-ECU

FUSIBLE
LINK

34

IGNITION
SWITCH (IG1)

IG1
RELAY

AWD-ECU

D7G27M002A00

GREY

GREY

GREY

WHITE

WHITE

C-128

C-31

C-309

ELECTRONIC CONTROL AWD

27C-75

DIAGNOSIS

ZC6000240002

Connectors: C-128

C-128

ZC6000260003

ETACS-ECU
(front view)

C-313
(BR)

C-309
(B)

Connectors: C-309, C-313

 

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
operation),  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 54D - CAN

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

STEP 2. Check the following connector:
Check  the  C-128  AWD-ECU  connector  for  improper
engagement,  terminal  damage  or  terminal  drawn  in  the
connector case.

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.

STEP 3. Voltage measurement at the AWD-ECU connector

(1)

Disconnect the C-128 AWD-ECU connector.

(2)

Turn the ignition switch to the ON position.

27C-76

ELECTRONIC CONTROL AWD

DIAGNOSIS

C-128 harness 
connector: 
harness side 

ZC3047200000

(3)

Measure the voltage between the C-128 wiring harness side
connector terminals No. 4 and the body earth.

OK: Battery voltage

Q:Is the check result normal?

YES:

 Go to Step 5.

NO:

 Go to Step 4.

STEP 4. Wiring harness check

NOTE: 

Before the wiring harness inspection, inspect the

C-313 and C-309 ETACS-ECU connectors, and repair if
necessary.
Check  the  wiring  harness  between  the  C-128  AWD-ECU
connector  (terminal  No.  4)  and  the  C-309  ETACS-ECU
connector (terminal No. 1) for damage or other problem.

Q:Is the wiring harness in good condition?

YES:

 Go to Step 7.

NO:

 Repair the wiring harness. Then go to Step 8.

STEP 5. Resistance measurement at the AWD-ECU
connector

(1)

Disconnect the C-128 AWD-ECU connector.

ZC3047210000

C-128 harness 
connector: 
harness side 

(2)

Measure the resistance between the C-128 wiring harness
side connector terminals No. 10 and the body earth.

OK: 2 ohm or less

Q:Is the check result normal?

YES:

 Go to Step 7.

NO:

 Go to Step 6.

STEP 6. Wiring harness check

ZC3047210000

C-128 harness 
connector: 
harness side 

Check  the  wiring  harness  between  the  C-128  AWD-ECU
connector (terminal No. 10) and the body earth (No. 9 or No. 18)
for damage or other problem.

Q:Is the wiring harness in good condition?

YES:

 Go to Step 7.

NO:

 Repair the wiring harness. Then go to Step 8.

ELECTRONIC CONTROL AWD

27C-77

DIAGNOSIS

ZC3053940000

Body ground No.10

Quarter panel
inner (LH)

ZC3053890000

Body ground No.18

Rear heater
duct (LH)

STEP 7. Retest the system.

Q:Does the malfunction occur again?

YES:

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

Step 8.

NO:

 The trouble can be an intermittent malfunction.

(Refer to GROUP 00 - How to Cope with Intermittent
Malfunction .)

STEP 8. Check whether the DTC is reset.

Q:Does the malfunction occur again?

YES:

 Diagnose again from Step 1.

NO:

 This diagnosis is complete.

27C-78

ELECTRONIC CONTROL AWD

DIAGNOSIS