Mitsubishi Outlander (2013+). Manual - part 477

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-83

STEP 5. M.U.T.-III data list
Check the following data list (Refer to 

P.35C-85

).

•

Item No.

Item name

Normal 
condition

120

Parking brake 
switch (Input)

ON

 Pulled up parking brake lever.

•

Item No. Item name

Normal condition

70

Target gear

• "R"

• Selector lever:"R" 

position

• "D"

• Selector lever:"D" 

position

• "P"

• Selector lever:"P" 

position

• "N"

• Selector lever:"N" 

position

71

Actual gear

The selector lever is in the "R", "D", "N" and "P" 
position. <Except M/T>

Q: Is the check result normal?

YES : 

Go to Step 6.

NO <Item No. 120> : 

Carry out the Inspection 

procedure 3 "Brake warning lamp stays ON 
with the parking brake lever released (ABS 
warning lamp is OFF)" (Refer to 

P.35C-67

), 

and then go to Step 10.

NO <Item No. 70, 71> : 

Go to Step 9.

STEP 6. M.U.T.-III data list
Check the following data list under curb weight con-
dition or one occupant (driver) only in the vehicle, on 
a flat road.(Refer to 

P.35C-85

)

• Item 09: G sensor

• Item 12: Yaw rate sensor

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Carry out the calibration of the G and yaw 
rate sensor (Refer to 

P.35C-93

). Then go to 

Step 9.

STEP 7. M.U.T.-III data list
Check the following data list (Refer to 

P.35C-85

).

• Item 10: Master cylinder pressure

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Carry out the calibration of the brake fluid 
pressure sensor (Refer to 

P.35C-93

). Then 

go to Step 10.

STEP 8. M.U.T.-III diagnosis code
Use M.U.T.-III to check that the diagnosis code is set 
in the CVT-ECU.

Q: Is the diagnosis code set?

YES : 

Carry out the diagnosis for the diagnosis 

code (Refer to GROUP - 23A 

− 

Troubleshooting/Diagnosis Code Chart ).

NO : 

Go to Step 9.

STEP 9. Retest the system.
Check if the HSA works with one occupant (driver) 
only in the vehicle.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

NO : 

Replace the hydraulic unit (integrated with 
ASC-ECU) (Refer to 

P.35C-95

).

STEP 10. Retest the system.
Check if the HSA works with one occupant (driver) 
only in the vehicle.

Q: Is the check result normal?

YES : 

This diagnosis is complete.

NO : 

Return to Step 1.

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-84

Inspection Procedure 16: HSA (Hill Start Assist) works on a flat road.

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnosis code may be set. Prior 
to this diagnosis, diagnose the CAN bus lines 
(Refer to GROUP 54C 

− CAN Bus Diagnostics 

Table ).

• Whenever ECU is replaced, ensure that the 

CAN bus lines are normal.

• When the hydraulic unit (integrated with 

ASC-ECU) is replaced, always carry out the 
calibration of the steering wheel sensor, the G 
and yaw rate sensor and brake fluid pressure 
sensor (Refer to 

P.35C-93

, 

P.35C-94

 and 

P.35C-94

).

COMMENTS ON TROUBLE SYMPTOM

• A failure may have occurred in the calibration of 

the G & yaw rate sensor.

• Some drivers mistake a brake dragging for HSA 

operation.

• If the suspension is modified, the vehicle posture 

changes, and the ASC-ECU judges that the vehi-
cle is on a steep slope and may activate HSA.

PROBABLE CAUSES

• ASC-ECU malfunction

• Brake drag

• Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE

STEP 1. HSA operation check
Check if the HSA works on a flat road with one occu-
pant (driver) only in the vehicle.

Q: Does the HSA work on a flat road?

YES : 

Go to Step 2.

NO : 

This diagnosis is complete.

STEP 2. M.U.T.-III data list
Check the following data list (Refer to 

P.35C-85

).

• Item 09: G sensor

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Carry out the calibration of the G and yaw 
rate sensor (Refer to 

P.35C-93

). Then go to 

Step 4.

STEP 3. Brake drag check
Check the brake system for drag.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the brake drag, and then go to Step 
4.

STEP 4. Retest the system.
Check if the HSA works on a flat road with one occu-
pant (driver) only in the vehicle.

Q: Does the HSA work on a flat road?

YES : 

Replace the hydraulic unit (integrated with 

ASC-ECU) (Refer to 

P.35C-95

).

NO : 

This diagnosis is complete.

Inspection Procedure 17: The initial check sound of hydraulic unit is loud.

CAUTION

When installing brake tube, match the axial 

centre of flare nut and brake tube with the centre 
of hole at the hydraulic unit side, and check that 
the fluid does not leak.

COMMENT ON TROUBLE SYMPTOM

The operation sound may be decreased by reducing 
the load at the rubber mount portion of the brake 
tube and hydraulic unit. 

PROBABLE CAUSES

• Improper installation of the hydraulic unit

• Improper installation of the brake tube

DIAGNOSIS PROCEDURE

DRIVING CHECK
(1) Turn the ignition switch from the "LOCK" (OFF) 

position to the "ON" position.

(2) When vehicle speed reaches 10 km/h, check the 

operating sound volume and compare it with that 

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-85

of the same model.

OK: The operating sound is the same vol-
ume or less by comparing with that of the 
same model.

Q: Is the check result normal?

YES : 

This diagnosis is complete.

NO : 

Carry out adjustment for hydraulic unit 
installation. (Refer to 

P.35C-90

).

DATA LIST REFERENCE TABLE

M1355001500993

The following items of ECU input data can be read 
using M.U.T.-III.

The system is normal.

Item No. Check item

Check condition

Normal condition

01

FL wheel speed sensor

Perform a test run of the vehicle.

The speedometer display and 
the M.U.T.-III display almost 
agree with each other. (During 
stop: approximately 0.7km/h)

02

FR wheel speed sensor

03

RL wheel speed sensor

04

RR wheel speed sensor

05

Power supply voltage

System voltage (10 to 18 V 
ASC operable range)

07

Brake switch (input)

The brake pedal is depressed.

ON

The brake pedal is released.

OFF

08

Lateral G sensor (+: left 
turn, -: right turn)

Vehicle stopped (level)

-0.11 to 0.11 G

Running

-1 to 1 G

09

G sensor (+: 
deceleration, -: 
acceleration)

Vehicle stopped (level)

-0.04 to 0.04 G

Running

-1 to 1 G

10

Master cylinder pressure 
(+: pressure increase, -: 
pressure decrease)

The brake pedal is depressed.

Increases by the amount of 
the brake pedal depression.

The brake pedal is released.

-3 to 3 bar

11

Steering angle (+: left 
turn, -: right turn)

Vehicle stopped (the steering wheel is 
in the neutral position)

-6 to 6 deg

Running

Nearly the same as the 
steering wheel operation 
angle <-720 to 720 deg 
(ASC-ECU normal detection 
value)>

Nearly the same as the 
steering wheel operation 
angle <-850 to 850 deg 
(Sensor normal value as a 
single unit)>

12

Yaw rate sensor (+: left 
turn, -: right turn)

Vehicle stopped (level)

-3.6 to 3.6 deg/s

Running

-100 to 100 deg/s

14

Brake switch

The brake pedal is depressed.

ON

The brake pedal is released.

OFF

15

Emission test mode

Emission test mode: ON

ON

Emission test mode: OFF

OFF

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-86

45

SAS OK flag

When the steering wheel sensor 
neutral point is learned

Comp

When the steering wheel sensor 
neutral point is not learned

Not Comp

When the steering wheel sensor is 
defective

SAS fail

SAS fail&No Comp

65

Engine Speed

When the accelerator pedal is 
depressed (engine started)

The tachometer display and 
the M.U.T.-III display almost 
agree with each other.

66

Engine torque

Displays the engine torque.

67

APS

Displays the accelerator pedal 
opening angle.

68

Allow ESP torque request

Allow

70

Target gear

When the selector lever is operated

Displays the selector lever 
position.

71

Actual gear

72

Master cylinder pressure 
offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the master cylinder 
pressure sensor calibration and the 
neutral position after the calibration.

-8 to 8 bar

73

Lateral G sensor offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the G and yaw rate 
sensor calibration and the neutral 
position after the calibration.

-0.15 to 0.15 G

74

Steering angle offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the steering wheel 
sensor calibration and the neutral 
position after the calibration.

-10 to 10 deg

86

Ignition switch

Ignition switch: ON

ON

87

Ignition switch (input)

Ignition switch: ON

ON

88

Vehicle speed

Perform a test run of the vehicle.

The speedometer display and 
the M.U.T.-III display almost 
agree with each other.

91

Brake pressure sensor

The brake pedal is depressed.

ON

The brake pedal is released.

OFF

96

G sensor offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the G and yaw rate 
sensor calibration and the neutral 
position after the calibration.

-0.1 to 0.1 G

97

Yaw rate sensor offset

The difference between the neutral 
position that was input to the 
ASC-ECU before the G and yaw rate 
sensor calibration and the neutral 
position after the calibration.

-6.0 to 6.0 deg/s

Item No. Check item

Check condition

Normal condition