Mitsubishi Outlander XL. Manual - part 686

 

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Mitsubishi Outlander XL. Manual - part 686

 

 

DTC U0126

Wiring harness or connector failure of CAN bus line

Steering wheel sensor malfunction

ASC-ECU malfunction

DTC U0141

Wiring harness or connector failure of CAN bus line

Malfunction of ETACS-ECU

ASC-ECU malfunction

DIAGNOSIS

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicle Communication Interface (V.C.I.)

MB991827: M.U.T.-III USB Cable

MB991910: M.U.T.-III Main Harness A

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.

Q:Is the check result normal?

YES:

 Go to Step 2.

NO:

 Repair the CAN bus lines. (Refer to GROUP 54D - CAN

Bus Diagnostics table P.54D-17.) On completion, go to
Step 4.

STEP 2. M.U.T.-III other system diagnostic trouble code
Use scan tool to check that other diagnostic trouble code is set
in the ECU corresponding to the relevant diagnosis.

Q:Is other DTC set?

YES:

 Troubleshoot for the relevant diagnostic trouble

code.

NO:

 Go to Step 3.

STEP 3. M.U.T.-III diagnostic trouble code
Use scan tool to check that the diagnostic trouble code is set in
ASC-ECU.

Q:Is any DTC set?

YES (DTC U0100 is set):

 Replace the engine ECU, and then

go to Step 4.

YES (DTC U0101 is set):

 Replace the A/T-ECU, and then go

to Step 4.

YES (DTC U0114 is set):

 Replace AWD-ECU, and then go to

Step 4.

YES (DTC U0123 is set):

 Replace the steering wheel

sensor, and then go to Step 4.

YES (DTC U0141 is set):

 Replace the ETACS-ECU, and then

go to Step 4.

NO (No DTC is set.):

 The procedure is complete.

STEP 4. Check whether the diagnostic trouble code is reset.

Q:Is DTC U0100, U0101, U0114, U0126, or U0141 set?

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-151

DIAGNOSIS

YES:

 Replace the ASC-ECU.

NO:

 The procedure is complete.

DTC U0125: G and yaw rate sensor message time-out error/message error

M13506100075USA0000010000

If there is any problem in the CAN bus lines, an incorrect
diagnostic trouble code may be set. Prior to this diagnosis,
diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble
code diagnosis P.54D-17
).

CIRCUIT OPERATION
The G and yaw rate sensor outputs the signal to ASC-ECU via
the special CAN bus lines.

DTC SET CONDITIONS
This  diagnostic  trouble  code  is  set  when  the  G  and  yaw  rate
sensor signal is not sent to ASC-ECU.

PROBABLE CAUSES

Wiring harness or connector failure of CAN bus line

G and yaw rate sensor malfunction

ASC-ECU malfunction

External noise interference

DIAGNOSIS

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicle Communication Interface (V.C.I.)

MB991827: M.U.T.-III USB Cable

MB991910: M.U.T.-III Main Harness A

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.

Q:Is the check result normal?

YES:

 Go to Step 2.

NO:

 Repair the CAN bus lines. (Refer to GROUP 54D - CAN

Bus Diagnostics table P.54D-17.) On completion, go to
Step 4.

STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines

Q:Is DTC U0125 set?

YES:

 Replace the G and yaw rate sensor, and then go to

Step 3.

NO:

 The procedure is complete.

35C-152

ACTIVE SKID CONTROL SYSTEM (ASC)

DIAGNOSIS

STEP 3. Check whether the diagnostic trouble code is reset.

Q:Is DTC U0125 set?

YES:

 Replace the ASC-ECU, and then go to Step 4.

NO:

 The procedure is complete.

STEP 4. Check whether the diagnostic trouble code is reset.

Q:Is DTC U0125 set?

YES:

 Go to Step 1.

NO:

 The procedure is complete.

DTC U0401: Engine malfunction detected

M13506100076USA0000010000

If  diagnostic  trouble  code  U0401  is  set  in  ASC-ECU,
always diagnose the CAN bus line. If there is any fault in
the CAN bus lines, an incorrect diagnostic trouble code
may be set. In this case, the set diagnostic trouble code
is not highly reliable.

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

CIRCUIT OPERATION
Engine-related signals are sent or received to and from between
ASC-ECU and engine ECU via CAN bus lines.

DTC SET CONDITIONS
This  diagnostic  trouble  code  is  set  when  the  engine  ECU
malfunction has been detected.

PROBABLE CAUSES

Engine ECU malfunction

ASC-ECU malfunction

External noise interference

DIAGNOSIS

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicle Communication Interface (V.C.I.)

MB991827: M.U.T.-III USB Cable

MB991910: M.U.T.-III Main Harness A

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.

Q:Is the check result normal?

YES:

 Go to Step 2.

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-153

DIAGNOSIS

NO:

 Repair the CAN bus lines. (Refer to GROUP 54D - CAN

Bus Diagnostics table P.54D-17.) On completion, go to
Step 5.

STEP 2. M.U.T.-III diagnostic trouble code
Use scan tool to check that any diagnostic trouble code other
than the code U0401 is set in ASC-ECU.

Q:Is any DTC set?

YES:

 Troubleshoot the relevant diagnostic trouble code,

and then go to Step 5.

NO:

 Go to Step 3.

STEP 3. M.U.T.-III other system diagnostic trouble code
Use scan tool to check that the diagnostic trouble code is set by
the engine ECU.

Q:Is any DTC set?

YES:

 Troubleshoot the relevant diagnostic trouble code,

and then go to Step 5.

NO:

 Go to Step 4.

STEP 4. Check whether the diagnostic trouble code is reset.

Q:Is DTC U0401 set?

YES:

 Replace the ASC-ECU.

NO:

 If the trouble symptom is resolved, an intermittent

malfunction such as poorly engaged connector(s) or wiring
harness is suspected. (Refer to GROUP 00 - How to Cope
with Intermittent Malfunction P.00-15.)

STEP 5. Check whether the diagnostic trouble code is reset.

Q:Is DTC U0401 set?

YES:

 Return to Step 1.

NO:

 The procedure is complete.

DTC U0428: Communication error in steering wheel sensor

M13506100077USA0000010000

If the diagnostic trouble code U0428 is set in ASC-ECU,
always diagnose the CAN bus line. If there is any fault in
the CAN bus lines, an incorrect diagnostic trouble code
may be set. In this case, the set diagnostic trouble code
is not highly reliable.

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

CIRCUIT OPERATION
The steering wheel sensor outputs the steering wheel status to
ASC-ECU via the CAN bus lines.

35C-154

ACTIVE SKID CONTROL SYSTEM (ASC)

DIAGNOSIS

 

 

 

 

 

 

 

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