Mitsubishi L200. Manual — part 457

AC800980

AG

Connector: A-48

(B)

AC600687CC

Connector: C-114 <LHD>

Harness side
connector

4

1

2

3

AC600623

Harness side
connector

CJ

Connector: C-114 <RHD>

4

1

2

3

AC600687CD

Connectors: C-10, C-30 <LHD>

C-10

C-30

C-10

C-30

6 7

1 2

11

8 9 10

3 4

12

5

AC600623DD

Connector: C-10, C-13 <RHD>

C-10

C-13

6 7

1 2

11

8 9 10

3 4

12

5

C-10

AC600688

Connector: C-13 <LHD>

BS

AC600635BH

Connector: C-30 <RHD>

AC809345 AF

Connectors: F-02, F-03, F-04, F-07, F-19, F-23

F-07 (B)

F-03 (B)

F-02 (B)

<Vehicles without
rear body>

F-04 (B)

F-19

F-23

2 1

3

1

2

6

5

4

F-03
Harness connector

F-07

F-19, F-23
Harness connector

2
5

6

3

4

1

F-02, F-04
Harness connector

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-84

CAUTION

If there is any problem in the CAN bus lines, an
incorrect diagnosis code may be set. Diagnose
the CAN bus lines before the diagnosis codes
(Refer to GROUP 54C

− CAN Bus Diagnostics

Table .).
OPERATION
ASTC-ECU monitors the fluid pressure in the
hydraulic unit using the incorporated pressure sen-
sor, and adjusts the fluid pressure for the ASC or
ATC drive based on this data.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-85

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set in the following cases:

• The output value of the pressure sensor does not

change at the vehicle speed of 7 km/h or more
when the brake pedal is depressed.

• When the vehicle drives at the speed of 40 km/h

or more, the amount of the change of the pres-
sure sensor output values during the time from
the brake pedal depression to the vehicle stop is
less than the specified value.

• The output value of the pressure sensor is abnor-

mal.

PROBABLE CAUSES
The most likely causes for these diagnosis codes to
set are:

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit assembly (inte-

grated with ASTC-ECU)

• Incorrect stop lamp switch installation or malfunc-

tion

• Residual brake fluid pressure

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III 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 .). Then

go to Step 2.

STEP 2. Check whether the diagnosis code is
reset.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF)

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is set.
(6) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is code No.C1361 set?

YES :

Go to Step 3.

NO :

The procedure is complete.

STEP 3. Check for stop lamp switch installation
Refer to GROUP 35A

− On-vehicle Service/Brake

Pedal Check and Adjustment .

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Install the stop lamp switch correctly (Refer
to GROUP 35A

− On-vehicle Service/Brake

Pedal Check and Adjustment .). Then go to
Step 14 .

STEP 4. M.U.T.-III data list
Check the following data list (Refer to

P.35C-131

).

• Item No.13: Stop lamp switch

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Go to Step 6.

STEP 5. Check protrusion amount of the booster
Refer to GROUP 35A

− Master cylinder Assembly

and Brake Booster Assembly <LHD>, <RHD>.

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

Push rod protrusion amount adjustment
(Refer to GROUP 35A

− Master cylinder

Assembly and Brake Booster Assembly
<LHD>, <RHD>.). Then go to Step 14.

STEP 6. Stop lamp and high-mount stop lamp
operation check
Check the stop lamp and high-mount stop lamp oper-
ation when the brake pedal is depressed. Check that
the stop lamp and high-mount stop lamp illuminates
when the brake pedal is depressed and that it goes
out when the brake pedal is released.

OK:

When the brake pedal is released: OFF
When the brake pedal is depressed: ON

Q: Is the check result normal?

YES :

Go to Step 12.

NO :

Go to Step 7.

STEP 7. Connector check: C-114 stop lamp
switch connector

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair or replace it, and go to Step 14.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-86

STEP 8. Connector check: A-48 ASTC-ECU
connector, C-13,C-10 joint connector, C-30
intermediate connector, F-02 rear combination
lamp (stop: RH) connector (with rear body), F-19
rear combination lamp (stop: RH) connector
(without rear body), F-03 high mounted stop
lamp connector (with rear body), F-04 rear
combination lamp (stop: LH) connector (with rear
body), F-23 rear combination lamp (stop: LH)
connector (without rear body), F-07 intermediate
connector

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair or replace it, and go to Step 14.

STEP 9. Voltage measurement at C-114 stop lamp
switch connector.
(1) Remove C-114 stop lamp switch connector, and

measure at the wiring harness connector side.

(2) Measure the voltage between terminal No.2 and

body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

An open or short to power supply has
occurred in the wiring harness between
fusible link No.23 and C-114 stop lamp
switch connector terminal No.2, and fuse
No.12, therefore, repair it. Then go to Step
14.

STEP 10. Resistance measurement at C-114 stop
lamp switch connector.
(1) Disconnect the A-48 ASTC-ECU connector, C-

114 stop lamp switch connector, F-02 rear
combination lamp (stop: RH) connector (with rear
body), F-19 rear combination lamp (stop: RH)
connector (without rear body), F-03 high mounted
stop lamp connector (with rear body), F-04 rear
combination lamp (stop: LH) connector (with rear
body), F-23 rear combination lamp (stop: LH)
connector (without rear body), and measure the
voltage at C-114 stop lamp switch connector
harness side.

(2) Measure the resistance between terminal No.1

and body earth.

OK: No continuity

Q: Is the check result normal?

YES :

Go to Step 11.

NO :

A short to power supply has occurred in the
wiring harness between C-114 stop lamp
switch connector terminal No.1 and F-02
rear combination lamp (stop: RH) connector
(with rear body) terminal No.2 or F-19 rear
combination lamp (stop: RH) connector
(without rear body) terminal No.4, or
between C-114 stop lamp switch connector
terminal No.1 and F-03 high mounted stop
lamp connector (with rear body) terminal
No.1, or between C-114 stop lamp switch
connector terminal No.1 and F-04 rear
combination lamp (stop: LH) connector (with
rear body) terminal No.2 or F-23 rear
combination lamp (stop: LH) connector
(without rear body) terminal No.4, therefore,
repair it.Then go to Step 14 .

STEP 11. Resistance measurement at C-114 stop
lamp switch connector and C-10 joint connector.
(1) Disconnect the C-114 stop lamp switch connector

and C-10 joint connector, and measure at the
harness side.

(2) Measure the resistance between C-114 stop

lamp switch connector terminal No.1 and C-10
joint connector terminal No.7.

OK: Continuity exists (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

Repair the wiring harness, and then go to
Step 14.

STEP 12. Voltage measurement at A-48 ASTC-
ECU connector.
(1) Disconnect the A-48 ASTC-ECU connector.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No.26 and

body earth.

OK:

• When the brake pedal is released: 1 V

or less

• When the brake pedal is depressed:

System voltage

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

An open circuit in signal line has occurred in
the wiring harness between A-48 ASTC-
ECU connector terminal No.26 and C-10
joint connector terminal No.1, therefore,
repair it. Then go to Step 14.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-87

STEP 13. Check whether the diagnosis code is
reset.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF)

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is set.
(6) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is code No.C1361 set?

YES :

Replace the hydraulic unit assembly

(integrated with ASTC-ECU). (Refer to

P.35C-140

.). Then go to Step 14.

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Cope with Intermittent

Malfunctions .).

STEP 14. Check whether the diagnosis code is
reset.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF)

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is set.
(6) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is code No.C1361 set?

YES :

Go to Step 1.

NO :

The procedure is complete.

Code No.C1362: Abnormal pressure sensor (output error, open or short circuit)

CAUTION

If there is any problem in the CAN bus lines, an
incorrect diagnosis code may be set. Diagnose
the CAN bus lines before the diagnosis codes
(Refer to GROUP 54C

− CAN Bus Diagnostics

Table ).
OPERATION
ASTC-ECU monitors the fluid pressure in the
hydraulic unit using the incorporated pressure sen-
sor, and adjusts the fluid pressure for the ASC or
ATC drive based on this data.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set in the following cases:

• The deceleration calculated from the output value

of the pressure sensor at the vehicle speed of 7
km/h or more is one quarter of the normal value
or less than that.

• The power supply voltage of ASTC-ECU is nor-

mal, but the output voltage of the pressure sensor
is out of the specified range.

PROBABLE CAUSES
The most likely causes for these diagnosis codes to
set are:

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit assembly (inte-

grated with ASTC-ECU)

DIAGNOSIS PROCEDURE

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

Q: Is the check result?

YES :

Go to Step 3.

NO :

Repair the CAN bus line (Refer to GROUP
54C

− CAN Bus Diagnostics Table ). Then

go to Step 2.

STEP 2. Check whether the diagnosis code is
reset.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Drive the vehicle at 7 km/h or more for 5 seconds

or more.

(4) Turn the ignition switch to the "LOCK" (OFF)

position.

(5) Turn the ignition switch to the "ON" position.
(6) Check if the diagnosis code is set.
(7) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is code No.C1362 set?

YES :

Go to Step 3.

NO :

The procedure is complete.

STEP 3. Check whether the diagnosis code is
reset.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.