Mitsubishi L200. Manual — part 459
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-92
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.C1385 set?
YES :
Replace the hydraulic unit assembly
(integrated with ASTC-ECU). (Refer to
). 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.C1385 set?
YES :
Go to Step 1.
NO :
The procedure is complete.
Code No.C1386: G-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 output when the G-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.C1386 set?
YES :
Replace the G and yaw rate sensor (Refer
to
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.C1386 set?
YES :
Replace the hydraulic unit assembly
(integrated with ASTC-ECU). (Refer to
). Then go to Step 4.
NO :
The procedure is complete.
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-93
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.C1386 set?
YES :
Go to Step 1.
NO :
The procedure is complete.
Code No.C1388: Yaw rate sensor (active check error)
Code No.C1389: G-sensor (active check 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, lat-
eral, and yaw rate G for the vehicle, and sends them
to ASTC-ECU via the CAN bus line.
DIAGNOSIS CODE SET CONDITION
These diagnosis codes are set when the power sup-
ply voltage of ASTC-ECU is normal but the G and
yaw rate sensor operates abnormally.
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 normal?
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.C1388 or C1389 set?
YES :
Replace the G and yaw rate sensor (Refer
to
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.C1388 or C1389 set?
YES :
Replace the hydraulic unit (integrated with
ASTC-ECU) (Refer to
). 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.C1388 or C1389 set?
YES :
Go to Step 1.
NO :
The procedure is complete.
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-94
Code No.C1393: G rate sensor (zero-point not calibrated)
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 calibration for
the G and yaw rate sensor is incomplete.
PROBABLE CAUSES
The most likely causes for these diagnosis codes to
set are:
• The calibration for the G and yaw rate sensor is
incomplete.
• 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 normal?
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) 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.C1393 set?
YES :
Perform the calibration for the G and yaw
rate sensor (Refer to
).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.C1393 set?
YES :
Replace the G and yaw rate sensor (Refer
to
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.C1393 set?
YES :
Replace the hydraulic unit (integrated with
ASTC-ECU) (Refer to
). Then go
to Step 5.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
Malfunction ).
STEP 5. 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.C1393 set?
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-95
YES :
Go to Step 1.
NO :
The procedure is complete.
Code No.C1394: Steering wheel sensor neutral point not learned
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 steering wheel sensor detects a steering wheel
angle and sends it to ASTC-ECU via the CAN bus
line.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the calibration for
the steering wheel sensor is incomplete.
PROBABLE CAUSES
The most likely causes for these diagnosis codes to
set are:
• Incomplete calibration of the steering wheel sen-
sor
• Malfunction of steering wheel 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 normal?
YES :
Go to Step 2.
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.C1394 set?
YES :
Perform the calibration for the steering
wheel sensor. (Refer to
.) 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.C1394 set?
YES :
Replace the steering wheel sensor (Refer to
). 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.C1394 set?
YES :
Replace the hydraulic unit (integrated with
ASTC-ECU) (Refer to
). Then go
to Step 5.
NO :
The procedure is complete.
STEP 5. 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.
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