Mitsubishi L200. Manual - part 465

AC800980

AG

Connector: A-48

(B)

AC900745AB

Connector: A-102 <LHD>

 (GR)

Harness connector
(harness side)

1

2

AC501971AS

Connector: A-102 <RHD>

Harness connector
(harness side)

1

2

 (GR)

AC600688

Connector: C-13, C-59 <LHD>

BW

C-59

C-13

16

10

13

4

1112

1 2 3

15

14

5

20

18

17

19

7

6

8 9

C-59

C-13

AC600687CT

Connectors: C-47, C-54, C-113 <LHD>

C-54

C-54

C-47

C-113 Harness side 

18

19

21

22

20

2423

11

12

10 9

7

8

6

1413

171615

3

4

5

1

2

C-113

1

C-47 Harness side 

AC600623DI

Connector: C-13, C-14, C-59 <RHD>

C-13, C-59

C-14

C-59

C-14

C-13

AC600623DH

Connectors: C-47,  C-113 <RHD>

Harness side

C-113

C-113

1

C-47 Harness side 

C-47

AC509967AZ

Connector: D-19 

Harness side

1

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-116

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 send the illumination signal of Brake 

warning lamp to the combination meter via the 
CAN communication.

• ASTC-ECU operates the Brake warning lamp 

and the Brake warning lamp for three seconds 
after the ignition switch is turned "ON" position for 
bulb check.

COMMENT
This may be caused by faults in the signal line, the 
combination meter or the ASTC-ECU.

PROBABLE CAUSES

• Malfunction of the combination meter

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-117

• Damaged wiring harness and connectors

• 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 normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table .). Then 

go to Step 13.

STEP 2. Brake fluid level check
Check that the brake fluid is filled up to the "MIN" 
level or higher.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 3.

STEP 3. Brake pad check
Refer to GROUP 35A 

− On-vehicle Service, Brake 

Pad Check .

Q: Is the check result normal?

YES : 

Fill the brake fluid up to the "MAX" level. 

Then go to Step 12.

NO : 

Replace the brake pad. (Refer to GROUP 
35A 

− On-vehicle Service, Brake Pad 

Replacement .). Then go to Step 13.

STEP 4. Brake fluid level sensor check
Refer to GROUP 35A 

− On-vehicle Service, Brake 

Fluid Level Sensor Check .

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the brake fluid level sensor (Refer 
to GROUP 35A 

− Master Cylinder Assembly 

and Brake Booster Assembly .) .Then go to 
Step 13.

STEP 5. Connector check: A-48 ASTC-ECU 
connector, A-102 brake fluid level switch 
connector, C-13 intermediate connector, C-14 
intermediate connector, C-15 intermediate 
connector, C-47 parking brake switch connector 
<stick type>, C-113 combination meter 
connector, D-19 parking brake switch connector 
<lever type>

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair or replace it. Then go to Step 13.

STEP 6. Check the wiring harness between A-102 
brake fluid level switch connector and C-113 
combination meter connector for short to earth.
Check the wiring harness between A-102 brake fluid 
level switch connector terminal No.1 and C-113 com-
bination meter connector terminal No.12 for short to 
earth.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness between the A-
102 brake fluid level switch connector 
terminal No.1 and the C-113 combination 
meter connector terminal No.12. Then go to 
Step 13.

STEP 7. Check for open circuit in the wiring 
harness between A-48 ASTC-ECU connector and 
C-113 combination meter connector.
Check for open circuit in the wiring harness between 
A-48 ASTC-ECU connector terminal No.5 and C-113 
combination meter connector terminal No.17.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness between the A-48 
ASTC-ECU terminal No.5 and the C-113 
combination meter connector terminal 
No.17. Then go to Step 13.

STEP 8. Parking brake switch check
Refer to GROUP 36 

− On-vehicles Service, Parking 

Brake Switch Check  <lever type>,  <stick type>.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Replace it. Then go to Step 13.

STEP 9. Resistance measurement at C-113 
combination meter connector
(1) Disconnect the C-113 combination meter 

connector and measure the harness-side 
connector.

(2) Keep the parking brake stick <stick type> or 

parking brake lever <lever type> released from 
being pulled.

(3) Measure the resistance between the C-113 

combination meter connector terminal No.12 and 
the body earth.

OK: No continuity

Q: Is the check result normal?

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-118

YES : 

Go to Step 10.

NO : 

A short circuit may be present in the signal 
line circuit. Repair the wiring harness 
between the C-113 combination meter 
connector terminal No.12 and the A-102 
brake fluid level switch connector terminal 
No.1 and C-47 parking brake switch 
connector terminal No.1 <stick type> or D-
19 parking brake switch connector terminal 
No.1 <lever type>. Then go to Step 13.

STEP 10. Brake fluid level sensor check
Refer to GROUP 35A 

− On-vehicles Service, Brake 

Fluid Level Sensor Check .

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair it. Then go to Step 13.

STEP 11. M.U.T.-III other diagnosis code
Check whether the diagnosis code is set by the com-
bination meter assembly.

Q: Is any diagnosis code set?

YES : 

Refer to Diagnosis Code Chart (Refer to .). 

Then go to Step 13.

NO : 

Replace the combination meter assembly 
(Refer to GROUP 54A, Combination Meter 
.). Then go to Step 12.

STEP 12. Retest the system

Q: Turn the ignition switch to the "ON" position. Does 

the brake warning lamp illuminate for three 
seconds, and then go out after the engine starts?
YES : 

The procedure is complete.

NO : 

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

P.35C-140

.). Then go 

to Step 13.

STEP 13. Retest the system

Q: Turn the ignition switch to the "ON" position. Does 

the brake warning lamp illuminate for three 
seconds, and then go out after the engine starts?
YES : 

The procedure is complete.

NO : 

Return to Step 1.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-119

Inspection Procedure 4: ABS warning lamp remains illuminated after the engine is started.

Combination Meter Circuit

ASTC-ECU

IGNITION 
SWITCH (IG1)

COMBINATION 
METER

Wire colour code
B : Black     LG : Light green
G : Green     L : Blue      
W : White     Y : Yellow
SB : Sky blue     BR : Brown 
O : Orange     GR : Grey  
R : Red     P : Pink     
V : Violet     PU : Purple

ACB00857

19

14

13

1

3

15

2

16

4

18

6

17

5

7

22

10

21

20

8 9

23

11

24

12

NOTE

LHD

: 

RHD

: