Mitsubishi Outlander XL. Manual - part 574

C-128 harness 
connector: 
harness side 

ZC3047200000

STEP 8. Wiring harness check

NOTE: 

Prior to the wiring harness inspection, check the

C-315 ETACS-ECU connector, and repair if necessary.
Check  the  wiring  harness  between  the  C-128  AWD-ECU
connector  (terminal  No.  3)  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 9.

NO:

 Repair the wiring harness. Then go to Step 10.

STEP 9. Check whether the DTC is reset.

(1)

Erase the DTC.

(2)

Turn the ignition switch from the LOCK (OFF) position to the
ON position at least 3 times.

(3)

Check if the DTC is set.

Q:Is the DTC No. C145D set?

YES:

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

Step 10.

NO:

 The trouble can be an intermittent malfunction.

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

STEP 10. Check whether the DTC is reset.

(1)

Erase the DTC.

(2)

Turn the ignition switch from the LOCK (OFF) position to the
ON position at least 3 times.

(3)

Check if the DTC is set.

Q:Is the DTC No. C145D set?

YES:

 Diagnose again from Step 1.

NO:

 This diagnosis is complete.

ELECTRONIC CONTROL AWD

27C-55

DIAGNOSIS

DTC U0001: Malfunction of bus-off

M12704100024USA0000010000

ETACS-ECU

FUSIBLE
LINK

34

IGNITION
SWITCH (IG1)

IG1
RELAY

AWD-ECU

D7G27M002A00

GREY

GREY

GREY

WHITE

WHITE

C-128

C-31

C-309

ZC6000240002

Connectors: C-128

C-128

ZC6000260001

ETACS-ECU
(front view)

C-313
(BR)

C-317

Connectors: C-313, C-317

 

｠

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.

｠

Before  replacing  the  ECU,  ensure  that  the
communication circuit is normal.

27C-56

ELECTRONIC CONTROL AWD

DIAGNOSIS

OPERATION
AWD-ECU monitors the CAN C-bus off interruption,
and if any abnormality occurs, it interrupts the system.

DTC SET CONDITIONS
If the following conditions are met when the system is
in operation (always), AWD-ECU gradually switches
the  control  from  AWD  to  FWD,  flashes  the  AWD/
LOCK  indicators  alternately,  and  sets  the  DTC  No.
U0001.

｠

IG1 voltage: 10 V or more

｠

When CAN C-bus off interruption is detected

TROUBLESHOOTING HINTS

Current trouble

｠

Wiring harness or connector failure of CAN bus line

｠

AWD-ECU malfunction

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.)

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.) Then go to Step 2.

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

｠

C-128 AWD-ECU connector

｠

C-313, C-317 ETACS-ECU 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 5.

STEP 3. Wiring harness check
Check  the  wiring  harness  between  the  C-128  AWD-ECU
connector and the C-313 ETACS-ECU connector for damage or
other problem.

Q:Is the wiring harness in good condition?

YES:

 Go to Step 4.

NO:

 Repair damage or other problem in the wiring harness.

Then go to Step 5.

STEP 4. 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.

ELECTRONIC CONTROL AWD

27C-57

DIAGNOSIS

Q:Is the DTC No. U0001 set?

YES:

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

Step 5.

NO:

 The trouble can be an intermittent malfunction such

as loose connector fit, wiring harness open circuit.
(Refer to GROUP - How to Cope with Intermittent
Malfunction P.00-15.)

STEP 5. Check whether the DTC is reset.

Q:Is the DTC No. U0001 set?

YES:

 Diagnose again from Step 1.

NO:

 This diagnosis is complete.

DTC U0100: Engine CAN time-out

M12704100025USA0000010000

ETACS-ECU

FUSIBLE
LINK

34

IGNITION
SWITCH (IG1)

IG1
RELAY

AWD-ECU

D7G27M002A00

GREY

GREY

GREY

WHITE

WHITE

C-128

C-31

C-309

27C-58

ELECTRONIC CONTROL AWD

DIAGNOSIS