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
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
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