Mitsubishi L200. Manual - part 458

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-88

(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 : 

Replace the hydraulic unit assembly 

(integrated with ASTC-ECU). (Refer to 

P.35C-140

). Then go to Step 4.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Cope with Intermittent 

Malfunction .)

STEP 4. 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 1.

NO : 

The procedure is complete.

Code No.C1364: Pressure sensor malfunction

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 CONDITION
This diagnosis code is set when the vehicle speed is 
10 km/h or more and the output value of the pressure 
sensor is more than the specified value.

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 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.C1364 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.
(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.C1364 set?

YES : 

Replace the hydraulic unit assembly 

(integrated with ASTC-ECU). (Refer to 

P.35C-140

). Then go to Step 4.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Cope with Intermittent 

Malfunction .)

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-89

STEP 4. 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.C1364 set?

YES : 

Go to Step 1.

NO : 

The procedure is complete.

Code No. C1369: G and yaw rate sensor (bank run record)

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
The G and yaw rate sensor detects longitudinal 
acceleration, lateral acceleration, and yaw rate for 
the vehicle, and sends them to ASTC-ECU via the 
CAN bus line.

DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the vehicle is driven 
under special conditions (laterally inclined road, etc).
NOTE: The ASTC indicator lamp turns off when the 
ignition switch is in the OFF position, or by the nor-
mal driving at the vehicle speed of 10 km/h or more.

Code No. C1371:  Yaw rate sensor (output error, oscillation error, zero-point error)

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
The G and yaw rate sensor detects longitudinal 
acceleration, lateral acceleration, and yaw rate for 
the vehicle, and sends them to ASTC-ECU via the 
CAN bus line.

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

• The input voltage of ASTC-ECU is normal, but 

the output of the yaw rate sensor at the vehicle 
speed of 15 km/h or more is abnormal.

• The input voltage of ASTC-ECU is normal, but 

the yaw rate output when the vehicle is driving at 
the speed of 10 km/h or more is abnormal.

• The input voltage of ASTC-ECU is normal, but 

the yaw rate sensor outputs acceleration or 
deceleration when the vehicle is stopped.

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

• Malfunction of G and yaw rate sensor

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit assembly (inte-

grated with ASTC-ECU)

DIAGNOSIS

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 2.

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

position.

(4) Turn the ignition switch to the "ON" position.

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-90

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

position.

Q: Is code No.C1371 set?

YES : 

Replace the G and yaw rate sensor.Then 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.
(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.C1371 set?

YES : 

Replace the hydraulic unit assembly 

(integrated with ASTC-ECU). (Refer to 

P.35C-140

). Then go to Step 4.

NO : 

The procedure is complete.

STEP 4. 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.C1371 set?

YES : 

Go to Step 1.

NO : 

The procedure is complete.

Code No. C1381:  G-sensor (output error, seizure)

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
The G and yaw rate sensor detects longitudinal 
acceleration, lateral acceleration, and yaw rate for 
the vehicle, and sends them to ASTC-ECU via the 
CAN bus line.

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

• The input voltage of ASTC-ECU is normal, but 

the G-sensor output is more than specified value 
when the vehicle is stopped.

• The input voltage of ASTC-ECU is normal, but 

the G-sensor outputs nothing during the time 
form the vehicle driving at the vehicle speed of 30 
km/h or more to the vehicle stop.

• The input voltage of ASTC-ECU is normal, but 

the acceleration output when the vehicle is driv-
ing at the speed of 10 km/h or more is abnormal.

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

• Malfunction of G and yaw rate sensor

• 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 2.

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 10 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.C1381 set?

TROUBLESHOOTING

ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)

35C-91

YES : 

Replace the G and yaw rate sensor (Refer 

to 

P.35C-142

). Then 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.
(3) Drive the vehicle at 10 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.C1381 set?

YES : 

Replace the hydraulic unit assembly 

(integrated with ASTC-ECU). (Refer to 

P.35C-140

). Then go to Step 4.

NO : 

The procedure is complete.

STEP 4. 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 10 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.C1381 set?

YES : 

Go to Step 1.

NO : 

The procedure is complete.

Code No.C1385: Yaw rate sensor (internal error)

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
The G and yaw rate sensor detects longitudinal 
acceleration, lateral acceleration, and yaw rate for 
the vehicle, and sends them to ASTC-ECU via the 
CAN bus line.

DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the yaw rate sensor 
is abnormal.

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

• Malfunction of G and yaw rate sensor

• 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 2.

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) 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.C1385 set?

YES : 

Replace the G and yaw rate sensor (Refer 

to 

P.35C-142

). Then go to Step 3.

NO : 

The procedure is complete.