Mitsubishi Outlander GS45X. Manual — part 436

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-171

DTC C2111: Brake Fluid Pressure Sensor Power Supply Circuit (High input)

DTC C2112: Brake Fluid Pressure Sensor Power Supply Circuit (Low input)

CAUTION

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

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

− CAN Bus Line Diagnostic Flow

P.54C-10

).

• 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 steer-
ing wheel sensor, the G and yaw rate sensor and brake
fluid pressure sensor (Refer to

P.35C-282

,

P.35C-283

and

P.35C-284

).

.

OPERATION

When the brake pedal is depressed, the brake fluid pressure
sensor integrated in the hydraulic unit detects the brake fluid
pressure applied from the master cylinder, converts the pres-
sure value into voltage signal, and outputs it.

.

DTC SET CONDITIONS

This diagnostic trouble code is set when the voltage applied to
the pressure sensor is not within the standard value range.

.

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

STEP 1. Using scan tool MB991958, diagnose the CAN bus
lines.
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 54C

−

CAN Bus Diagnostics Table

P.54C-17

). On

completion, go to Step 2.

STEP 2. DTC recheck after resetting CAN bus lines
Q: Are DTCs C2111 or C2112 set?

YES : Go to Step 3.
NO : The procedure is complete.

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-172

STEP 3. Battery check
Refer to GROUP 54A

− Battery Test

P.54A-9

.

Q: Is the battery in good condition?

YES : Go to Step 4.
NO : Charge or replace the battery, and then go to Step 6.

STEP 4. Charging system check
Refer to GROUP 16

− On−vehicle Service/Output Current Test

P.16-9

.

Q: Is the charging system in good condition?

YES : Go to Step 5.
NO : Repair or replace the charging system component(s),

and then go to Step 6.

STEP 5. Check whether the diagnostic trouble code is
reset.
Erase the diagnostic trouble code.
Q: Are DTCs C2111 or C2112 set?

YES : Replace the hydraulic unit (integrated with ASC-ECU)

(Refer to

P.35C-287

), and then go to Step 6.

NO : Intermittent malfunction (Refer to GROUP 00

− How

to Use Troubleshooting/How to Cope with Intermittent
Malfunctions

P.00-15

).

STEP 6. Check whether the diagnostic trouble code is
reset.
Erase the diagnostic trouble code.
Q: Are DTCs C2111 or C2112 set?

YES : Return to Step 1.
NO : The procedure is complete.

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-173

DTC C2114: Abnormality in G and yaw rate sensor operation voltage (Low voltage)

DTC C2115: Abnormality in G and yaw rate sensor operation voltage (High voltage)

G and Yaw Rate Sensor Circuit

ASC-ECU

G AND YAW
RATE SENSOR

ACA02068

AC901112

Connector: A-02

A-02 (B)

AF

AC901076AU

Connector: C-26

C-26 (B)

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-174

CAUTION

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

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

− CAN Bus Line Diagnostic Flow

P.54C-10

).

• Whenever ECU is replaced, ensure that the CAN bus

lines are normal.

• Do not drop or shock the G and yaw rate sensor.
• When the G and yaw rate sensor is replaced, always

carry out calibration to make ASC-ECU learn the neu-
tral point (Refer to

P.35C-282

).

• When the hydraulic unit (integrated with ASC-ECU) is

replaced, always carry out the calibration of the steer-
ing wheel sensor, the G and yaw rate sensor and brake
fluid pressure sensor (Refer to

P.35C-282

,

P.35C-283

and

P.35C-284

).

.

CIRCUIT OPERATION

• ASC-ECU supplies power to the G and yaw rate sensor at

the terminal No.1.

• 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 if any malfunction below is
found:

DTC C2114

• When the power supply voltage applied from ASC-ECU to

the G and yaw rate sensor is not within the standard value
range <low voltage (6.5

± 0.5 V or less)>

DTC C2115

• When the power supply voltage applied from ASC-ECU to

the G and yaw rate sensor is not within the standard value
range <high voltage (18.0

± 1.0 V or more)>

.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• G and yaw rate sensor malfunction

• 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