Mitsubishi L200. Manual - part 456

 

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Mitsubishi L200. Manual - part 456

 

 

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-80

• When the vehicle has been driving at a vehicle 

speed of 15 km/h or more for 15 minutes or 
longer with the stop lamp switch turned "ON".

• With the stop lamp switch "OFF", the decelerated 

speed G is occurred at the specified value or 
more.

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

• Malfunction of the stop lamp switch

• 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 normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table .). On 

completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting 
CAN bus lines
Erase the diagnosis code.

Q: Is the diagnosis code No.C1340 set?

YES : 

Go to Step 3.

NO : 

This diagnosis is complete.

STEP 3. 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 11.

NO : 

Go to Step 4.

STEP 4. Connector check: C-114 stop lamp 
switch connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace it, and go to Step 13.

STEP 5. 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 6.

NO : 

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

− On-vehicle Service/Brake 

Pedal Check and Adjustment .). Then go to 
Step 13  .

STEP 6. Stop lamp switch continuity check
(1) Remove the stop lamp switch (Refer to GROUP 

35A 

− Brake Pedal .).

ACX00671AE

No continuity

Continuity

4 mm

(2) Connect the circuit tester (

Ω range) to the stop 

lamp switch connector terminals No.1 and No.2.

(3) When no continuity is detected with the plunger 

pressed from the edge of the outer case by the 
dimension shown in the figure and when 
continuity is detected with the plunger released, 
the stop lamp switch is in good condition.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the stop lamp switch (Refer to 
GROUP 35A 

− Brake Pedal .). Then go to 

Step 13.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-81

STEP 7. 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 8.

NO : 

Repair or replace it, and go to Step 13.

STEP 8. 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 9.

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 
13.

STEP 9. 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 10.

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 13 .

STEP 10. 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 

 or less)

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Repair the wiring harness, and then go to 
Step 13.

STEP 11. 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 12.

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 13.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-82

STEP 12. Diagnosis code recheck

Q: Is the diagnosis code No.C1340 set?

YES : 

Replace the hydraulic unit (integrated with 

ASTC-ECU) (Refer to 

P.35C-140

.). Then go 

to Step 13.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Cope with Intermittent 

Malfunctions .).

STEP 13. Diagnosis code recheck

Q: Is the diagnosis code No.C1340 set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-83

Code No.C1361: Abnormal pressure sensor characteristics

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     SI : Silver

FUSIBLE 
LINK

23

RELAY 
BOX

STOP LAMP 
SWITCH

HIGH-
MOUNTED 
STOP 
LAMP

REAR 
COMBINATION 
LAMP 
(STOP: LH)

REAR 
COMBINATION 
LAMP 
(STOP: RH)

NOTE

: WITH REAR BODY
: WITHOUT REAR BODY

AC809288

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     SI : Silver

:

ACB00848

: LHD
: RHD

ASTC-ECU

 

 

 

 

 

 

 

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