Mitsubishi L200. Manual — part 443
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-28
Code No.C1210: Wheel speed sensor (RR) (signal open circuit)
ACB00772
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
Wheel Speed Sensor Circuit
ASTC-ECU
FRONT WHEEL
SPEED SENSOR
(LH)
FRONT WHEEL
SPEED SENSOR
(RH)
REAR WHEEL
SPEED SENSOR
(LH)
REAR WHEEL
SPEED SENSOR
(RH)
AC800980
AG
Connector: A-48
(B)
AC600687CB
Connectors: C-29 <LHD>
16
10
13
4
1112
1 2 3
15
14
5
20
18
17
19
7
6
8 9
AC600635BE
Connector: C-29 <RHD>
16
10
13
4
1112
1 2 3
15
14
5
20
18
17
19
7
6
8 9
AC504324 AX
Connectors: F-10, F-12
F-10 (GR)
F-10 Harness connector
(harness side)
F-12 (B)
F-12
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-29
CAUTION
• If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior
to this diagnosis, diagnose the CAN bus lines
(Refer to GROUP 54C
− CAN Bus Diagnostics
Table .).
• Before replacing the ECU, ensure that the
communication circuit is normal.
OPERATION
• A toothed ABS rotor generates a voltage pulse as
it moves across the pickup field of each wheel
speed sensor.
• The wheel speed sensor transmit the frequency
of the pulses to the ASTC-ECU.
• The hydraulic unit assembly (integrated with
ASTC-ECU) modulates the amount of braking
force individually applied to each wheel cylinder.
DIAGNOSIS CODE SET CONDITION
Diagnosis code No.C1210 is set when signal is not
input due to breakage of the wire of the wheel speed
sensor without the output of the code No.C1212.
PROBABLE CAUSES
Current trouble
• Damaged wiring harness and connectors
• Wheel speed sensor malfunction
• ASTC-ECU malfunction
Past trouble
• Carry out diagnosis with particular emphasis on
wiring harness and connector failures between
ASTC-ECU and the wheel speed sensor. For
diagnosis procedures, refer to How to treat past
trouble (GROUP 00
− How to Cope with Intermit-
tent Malfunctions .).
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnosis
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
(1) Erase the diagnosis code.
(2) Drive the vehicle at 15 km/h or more.
NOTE: The ABS warning lamp does not turn OFF
in some cases unless the vehicle runs at 15 km/h
or higher.
Q: Is the diagnosis code No.C1210 set?
YES :
Go to Step 3.
NO :
The procedure is complete.
STEP 3. M.U.T.-III diagnosis code
Check that the diagnosis code No.C1212 are also
set.
Q: Is the diagnosis code No.C1212 also set?
YES :
Perform the diagnosis for the diagnosis
code No.C1212 (Refer to
.).
NO :
Go to Step 4.
STEP 4. M.U.T.-III data list
Check the following data list (Refer to
• Item No.04: RR wheel speed sensor
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 5.
STEP 5. Connector check: A-48 ASTC-ECU
connector, C-29 intermediate connector, F-12
intermediate connector, F-10 rear wheel speed
sensor (RH) connector
Q: Is the check result normal?
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-30
YES :
Go to Step 6.
NO :
Repair the defective connector. Then go to
Step 9.
STEP 6. Resistance measurement at the A-48
ASTC-ECU connector
(1) Disconnect the A-48 ASTC-ECU connector.
(2) Measure the resistance between the A-48 ASTC-
ECU connector terminal No.20 and terminal
No.21.
OK: Continuity
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness. Then go to Step
9.
STEP 7. Check for wheel speed sensor as a
single unit
Refer to
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Replace the wheel speed sensor (Refer to
.). Then go to Step 9.
STEP 8. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Drive the vehicle at 15 km/h or more.
NOTE: The ABS warning lamp does not turn OFF
in some cases unless the vehicle runs at 15 km/h
or higher.
Q: Is the diagnosis code No.C1210 set?
YES :
Replace the hydraulic unit (integrated with
ASTC-ECU) (Refer to
.). Then go
to Step 9.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
Malfunctions .).
STEP 9. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Drive the vehicle at 15 km/h or more.
NOTE: The ABS warning lamp does not turn OFF
in some cases unless the vehicle runs at 15 km/h
or higher.
Q: Is the diagnosis code No.C1210 set?
YES :
Return to Step 1.
NO :
This diagnosis is complete.
TROUBLESHOOTING
ACTIVE STABILITY & TRACTION CONTROL SYSTEM (ASTC)
35C-31
Code No.C1215: Wheel speed sensor (RL) (signal open circuit)
ACB00772
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
Wheel Speed Sensor Circuit
ASTC-ECU
FRONT WHEEL
SPEED SENSOR
(LH)
FRONT WHEEL
SPEED SENSOR
(RH)
REAR WHEEL
SPEED SENSOR
(LH)
REAR WHEEL
SPEED SENSOR
(RH)
AC800980
AG
Connector: A-48
(B)
AC600687CB
Connectors: C-29 <LHD>
16
10
13
4
1112
1 2 3
15
14
5
20
18
17
19
7
6
8 9
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст