ON-BOARD DIAGNOSIS [DSC (DYNAMIC STABILITY CONTROL)]

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On-Board Diagnostic (OBD) Test Description

•  The OBD test inspects the integrity and function of the DSC and outputs the results when requested by the specific tests.
•  On-board diagnostic test also:
―  Provides a quick inspection of the DSC usually performed at the start of each diagnostic procedure.
―  Provides verification after repairs to ensure that no other faults occurred during service.
•  The OBD test is divided into 3 tests:
―  Read/clear diagnostic results, PID monitor and record and active command modes.

Read/clear diagnostic results

•  This function allows you to read or clear DTCs in the DSC HU/CM memory.


PID/Data monitor and record

•  This function allows you to access certain data values, input signals, calculated values, and system status information.


Active command modes

•  This function allows you to control devices through the WDS or equivalent.


Reading DTCs Procedure

1.  Connect the WDS or equivalent to the vehicle DLC-2 connector.

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2.  Retrieve DTC using the WDS or equivalent.


Clearing DTCs Procedures

1.  After repairs have been made, perform the DTCs reading procedure.

2.  Erase DTC using the WDS or equivalent.

3.  Ensure that the customer’s concern has been resolved.


PID/Data Monitor and Record Procedure

1.  Connect the WDS or equivalent to the vehicle DLC-2 connector.

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2.  Access and monitor PIDs using the WDS or equivalent.


Active Command Modes Procedure

1.  Connect the WDS or equivalent to the vehicle DLC-2 16-pin connector.

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2.  Turn the ignition switch to the ON position (engine off) or start the engine.

3.  Activate active command modes using the WDS or equivalent.


DTC Table

DTC

System malfunction location

Page

WDS or

equivalent
B1317
Power supply system
(See DTC B1317, B1318 [DSC].)
B1318
Power supply system
(See DTC B1317, B1318 [DSC].)
B1342
DSC HU/CM (internal malfunction)
(See DTC B1342, C1267, C1730 [DSC].)
B2141
Vehicle data not recorded
(See DTC B2141 [DSC].)
B2741
Combined sensor (internal malfunction)
(See DTC B2741 [DSC].)
C1093
DSC OFF switch
(See DTC C1093 [DSC].)
C1095
Pump motor, motor relay
(See DTC C1095 [DSC].)
C1141
LF ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1142
RF ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1143
LR ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1144
RR ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1145
RF ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175 [DSC].)
C1155
LF ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175 [DSC].)
C1165
RR ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175 [DSC].)
C1175
LR ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175 [DSC].)
C1233
LF ABS wheel-speed sensor/ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1234
RF ABS wheel-speed sensor/ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1235
RR ABS wheel-speed sensor/ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1236
LR ABS wheel-speed sensor/ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236 [DSC].)
C1267
DSC HU/CM (internal malfunction)
(See DTC B1342, C1267, C1730 [DSC].)
C1277
Steering angle sensor
(See DTC C1277, C1295, C1306, C1307 [DSC].)
C1279
Combined sensor system
(See DTC C1279, C1280, C1281, C1282, C2778 [DSC].)
C1280
Combined sensor system
(See DTC C1279, C1280, C1281, C1282, C2778 [DSC].)
C1281
Combined sensor system
(See DTC C1279, C1280, C1281, C1282, C2778 [DSC].)
C1282
Combined sensor system
(See DTC C1279, C1280, C1281, C1282, C2778 [DSC].)
C1288
Brake fluid pressure sensor
(See DTC C1288, C1440 [DSC].)
C1295
Steering angle sensor
(See DTC C1277, C1295, C1306, C1307 [DSC].)
C1306
Steering angle sensor
(See DTC C1277, C1295, C1306, C1307 [DSC].)
C1307
Steering angle sensor
(See DTC C1277, C1295, C1306, C1307 [DSC].)
C1440
Brake fluid pressure sensor
(See DTC C1288, C1440 [DSC].)
C1446
Brake switch
(See DTC C1446 [DSC].)
C1470
TCS control system
(See DTC C1470, C1994 [DSC].)
C1730
Brake fluid pressure sensor power supply system
(See DTC B1342, C1267, C1730 [DSC].)
C1994
TCS/DSC control system
(See DTC C1470, C1994 [DSC].)
C2778
Combined sensor system
(See DTC C1279, C1280, C1281, C1282, C2778 [DSC].)
C2785
Combined sensor system (unperformed initialization procedure)
(See DTC C2785 [DSC].)
U1900
CAN line
(See DTC U1900, U2012, U2023, U2202, U2523 [DSC].)
U1901
Combined sensor system (CAN2 line malfunction)
(See DTC U1901, U2527 [DSC].)
U2012
CAN line
(See DTC U1900, U2012, U2023, U2202, U2523 [DSC].)
U2023
CAN line
(See DTC U1900, U2012, U2023, U2202, U2523 [DSC].)
U2202
CAN line
(See DTC U1900, U2012, U2023, U2202, U2523 [DSC].)
U2523
CAN line
(See DTC U1900, U2012, U2023, U2202, U2523 [DSC].)
U2527
Combined sensor system (CAN2 line malfunction)
(See DTC U1901, U2527 [DSC].)


PID/DATA Monitor Table

PID name

(definition)

Unit/Condition

Operation condition (reference)

Action

DSC HU/CM terminal
BOO_ABS
(Brake pedal switch input)
On/Off
•  Brake pedal depressed: On
•  Brake pedal released: Off
Inspect the brake switch.
—
CCNTABS
(Number of continuous codes)
—
•  DTCs detected: 1—255
•  No DTCs detected: 0
Perform the DTC inspection.
—
ESP_VOLT
V
•  Ignition switch at ON: Approx. 12.2 V
•  Idling: Approx. 14.1 V
Inspect the battery.
—
LAT_ACCL
G
•  Vehicle stopped or driving at constant speed: 0 G
•  Cornering to right: Changes 0 G—positive
•  Cornering to left: Changes 0 G—negative
Inspect the combined sensor.
—
LF_WSPD
(Left front ABS wheel-speed sensor input)
KPH, MPH
•  Vehicle stopped: 0 KPH, 0 MPH
•  Vehicle running: vehicle speed
Inspect the ABS wheel-speed sensor.
I, F
LR_WSPD
(Left rear ABS wheel-speed sensor input)
KPH, MPH
•  Vehicle stopped: 0 KPH, 0 MPH
•  Vehicle running: vehicle speed
Inspect the ABS wheel-speed sensor.
AJ, AG
MPRETDR
kPa, psi, Bar
•  Brake pedal depressed: Changes according to the brake fluid pressure
Inspect the DSC HU/CM.
(See DSC HU/CM INSPECTION.)
—
RF_WSPD
(Right front ABS wheel-speed sensor input)
KPH, MPH
•  Vehicle stopped: 0 KPH, 0 MPH
•  Vehicle running: vehicle speed
Inspect the ABS wheel-speed sensor.
AP, AS
RR_WSPD
(Right rear ABS wheel-speed sensor input)
KPH, MPH
•  Vehicle stopped: 0 KPH, 0 MPH
•  Vehicle running: vehicle speed
Inspect the ABS wheel-speed sensor.
O, R
SWA_POS
°
•  Steering wheel in neutral position (not turned): 0°
•  Steering wheel turned to left: Changes 0°—negative
•  Steering wheel turned to right: Changes 0°—positive
Inspect the steering angle sensor.
AE, AN
TCYC_FS
On/Off
•  Solenoid valve activated: On
•  Solenoid valve not activated: Off
Inspect the DSC HU/CM.
(See DSC HU/CM INSPECTION.)
—
TCYC_SW
Depressed/Not_Depressed
•  DSC OFF switch depressed: Depressed
•  DSC OFF switch not depressed: Not_Depressed
Inspect the DSC OFF switch.
AD
YAW_RATE
°/s
•  Vehicle stopped or driving straight: 0 °/s
•  Cornering to left: Changes 0 °/s—negative
•  Cornering to right: Changes 0 °/s—positive
Inspect the combined sensor.
—


Active Command Modes Table

Command name

Output part

Operation

Operating condition
LATACCEL
Combined sensor (lateral acceleration) initialization start-up
True/False
Ignition switch at ON
LF_INLET
LF inlet solenoid valve
On/Off
LF_OUTLET
LF outlet solenoid valve
LF_TC_PRV
LF stability control solenoid valve
LF_TC_SWV
LF traction control solenoid valve
LR_INLET
LR inlet solenoid valve
LR_OUTLET
LR outlet solenoid valve
MCYL_S_CAL
Brake fluid pressure sensor initialization start-up
True/False
PMP_MOTOR
Pump motor
On/Off
RF_INLET
RF inlet solenoid valve
RF_OUTLET
RF outlet solenoid valve
RF_TC_PRV
RF stability control solenoid valve
RF_TC_SWV
RF traction control solenoid valve
RR_INLET
RR inlet solenoid valve
RR_OUTLET
RR outlet solenoid valve