Mitsubishi Outlander XL. Manual - part 671

Q:Is the check result normal?

YES:

 Go to Step 3.

NO:

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

Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.

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

Q:Is DTC C1049 set?

YES:

 Go to Step 3.

NO:

 The procedure is complete.

STEP 3. M.U.T.-III diagnostic trouble code
Check that the diagnostic trouble codes C102B, C1032, C1035,
and C1044 are also set.

Q:Are DTC C102B, C1032, C1035, and C1044 also set?

YES:

 Carry out the diagnosis for the relevant diagnostic

trouble codes, and then go to Step 5.

NO:

 Go to Step 4.

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

(1)

Erase the diagnostic trouble code.

(2)

Drive the vehicle at 12mph (20 km/h) or more.

NOTE: 

The ABS warning light does not turn OFF in some

cases unless the vehicle runs at 12mph (20 km/h) or
higher.

Q:Is DTC C1049 set?

YES:

 Replace the ASC-ECU, and then go to Step 5.

NO:

 The procedure is complete.

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

(1)

Erase the diagnostic trouble code.

(2)

Drive the vehicle at 12mph (20 km/h) or more.

NOTE: 

The ABS warning light does not turn OFF in some

cases unless the vehicle runs at 12mph (20 km/h) or
higher.

Q:Is DTC C1049 set?

YES:

 Intermittent malfunction. (Refer to GROUP 00 - How

to Cope with Intermittent Malfunction P.00-15.)

NO:

 The procedure is complete.

DTC C104B,C104F,C1053,C1057/C105F,C1063,C1067,C105B: Abnormality in inlet/
outlet valve (FL,RL,RR,RL)

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-91

DIAGNOSIS

DTC C1200,C1204/C1208,C120C: Abnormality in cut/suction valve(FL/RR,FR/RL)

M13506100030USA0000010000

Solenoid Valve and Motor Power Supply Circuit

FUSIBLE
LINK

27

FUSIBLE
LINK

26

ASC-ECU

SOLENOID
VALVE
POWER
SOURCE

MOTOR
POWER
SOURCE

MOTOR 
POWER
SOURCE

SOLENOID
VALVE 
POWER
SOURCE

SOLENOID VALVE

HYDRAULIC UNIT

MOTOR

16

47

GND

GND

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

｠

ASC-ECU contains the power supply circuit (terminal No. 32)
for the solenoid valve. The solenoid valve is energized by the
valve relay, which is incorporated in ASC-ECU.

｠

The valve relay, which is incorporated in ASC-ECU, is always
energizing  the  solenoid  valve  unless  the  initial  check  is  in
progress when the ignition switch is turned on, or the recurrent
system check is in progress.

｠

ASC-ECU activates the solenoid valve by turning on its driving
transistor.

DTC SET CONDITIONS
These  diagnostic  trouble  codes  will  be  set  under  the  cases
below:

35C-92

ACTIVE SKID CONTROL SYSTEM (ASC)

DIAGNOSIS

｠

The solenoid valve is not energized even after ASC-ECU has
turned on the valve relay (Open circuit is present in the power
supply  circuit  to  the  ASC-ECU  solenoid  valve,  or  the  valve
relay has failed).

｠

The solenoid valve is not activated even after ASC-ECU has
turned  on  the  valve  relay  (Open  circuit  is  present  in  the
solenoid  valve  circuit  in  ASC-ECU,  or  the  valve  relay  has
failed).

｠

After  ASC-ECU  has  turned  off  the  driving  transistor,  the
solenoid valve still remains energized (short in the solenoid
valve circuit).

｠

When a solenoid valve failure is detected

PROBABLE CAUSES

｠

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

｠

MB991997: ASC check harness

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 3.

NO:

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

Bus Diagnostics table P.54D-10.) On completion, go to
Step 2.

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

Q:Are  DTC  C104B,  C104F,  C1053,  C1057,  C105F,  C1063,

C1067, C105B, C1200, C1204, C1208 or C120C set?

YES:

 Go to Step 3.

NO:

 The procedure is complete.

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

Q:Are  DTC  C104B,  C104F,  C1053,  C1057,  C105F,  C1063,

C1067, C105B, C1200, C1204, C1208 or C120C set?

YES:

 Replace the ASC-ECU.

NO:

 Intermittent malfunction. (Refer to GROUP 00 - How

to Cope with Intermittent Malfunction P.00-15.)

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-93

DIAGNOSIS

DTC C2104: Faulty valve power supply circuit

M13506100042USA0000010000

Solenoid Valve and Motor Power Supply Circuit

FUSIBLE
LINK

27

FUSIBLE
LINK

26

ASC-ECU

SOLENOID
VALVE
POWER
SOURCE

MOTOR
POWER
SOURCE

MOTOR 
POWER
SOURCE

SOLENOID
VALVE 
POWER
SOURCE

SOLENOID VALVE

HYDRAULIC UNIT

MOTOR

16

47

GND

GND

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

｠

ASC-ECU contains the power supply circuit (terminal No. 32)
for the solenoid valve. The solenoid valve is energized by the
valve relay, which is incorporated in ASC-ECU.

｠

The valve relay, which is incorporated in ASC-ECU, is always
energizing  the  solenoid  valve  unless  the  initial  check  is  in
progress when the ignition switch is turned on, or the recurrent
system check is in progress.

DTC SET CONDITIONS
This diagnostic trouble codes will be set under the cases below:

｠

When  the  solenoid  valve  supply  voltage  is  not  within  the
standard value.

35C-94

ACTIVE SKID CONTROL SYSTEM (ASC)

DIAGNOSIS