DYNAMIC STABILITY CONTROL (DSC) ON-BOARD DIAGNOSIS

BHE040243000W13

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 WDS or equivalent to the vehicle DLC-2 connector.

2. Retrieve DTC using WDS or equivalent.

Clearing DTCs Procedures

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

2. Erase DTC using WDS or equivalent.

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

PID/Data Monitor and Record Procedure

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

2. Access and monitor PIDs using WDS or equivalent.

Active Command Modes Procedure

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

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

3. Activate active command modes using WDS or equivalent.

DTC Table

DTC

System malfunction location

Page

WDS or equivalent

B1318
Power supply system
(See DTC B1318.)
B1342
DSC HU/CM system
(See DTC B1342.)
B1484
Brake switch system
B2477
DSC HU/CM configuration system
(See DTC B2477.)
C1093
DSC OFF switch system
(See DTC C1093.)
C1095
Pump motor, motor relay system
C1096
Pump motor, motor relay system
C1119
PCM, TCM communication system
C1134
PCM, TCM communication system
C1145
RF ABS wheel-speed sensor (open circuit) system
C1148
RF ABS wheel-speed sensor/ABS sensor rotor system
C1155
LF ABS wheel-speed sensor (open circuit) system
C1158
LF ABS wheel-speed sensor/ABS sensor rotor system
C1165
RR ABS wheel-speed sensor (open circuit) system
C1168
RR ABS wheel-speed sensor/ABS sensor rotor system
C1175
LR ABS wheel-speed sensor (open circuit) system
C1178
LR ABS wheel-speed sensor/ABS sensor rotor system
C1186
Valve relay system
C1194
LF outlet solenoid valve system
C1198
LF inlet solenoid valve system
C1210
RF outlet solenoid valve system
C1214
RF inlet solenoid valve system
C1222
ABS wheel-speed sensor (slip monitor) system
(See DTC C1222.)
C1233
LF ABS wheel-speed sensor (short to ground) system
C1234
RF ABS wheel-speed sensor (short to ground) system
C1235
RR ABS wheel-speed sensor (short to ground) system
C1236
LR ABS wheel-speed sensor (short to ground) system
C1242
LR outlet solenoid valve system
C1246
RR outlet solenoid valve system
C1250
LR inlet solenoid valve system
C1254
RR inlet solenoid valve system
C1266
Valve relay system
C1279
Combined sensor system
C1280
Combined sensor system
C1281
Combined sensor system
C1282
Combined sensor system
C1288
Brake fluid pressure sensor system
C1290
Brake fluid pressure sensor system
C1295
Steering angle sensor system
C1306
Steering angle sensor (abnormal initialization) system
(See DTC C1306.)
C1307
Steering angle sensor system
C1400
RF traction switch solenoid valve system
C1410
LF traction switch solenoid valve system
C1440
Brake fluid pressure sensor system
C1730
Brake fluid pressure sensor system
C1805
Incorrect DSC HU/CM installed
(SeeDTC C1805.)
C1937
Steering angle sensor system
C1938
Steering angle sensor system
C1951
Combined sensor system
C1952
Combined sensor system
C1953
Brake switch system
C1954
Brake fluid pressure sensor system
C1956
Steering angle sensor system
C1957
RF DSC switch solenoid valve system
C1958
LF DSC switch solenoid valve system
C1959
Combined sensor system
C1994
DSC control system
(See DTC C1994.)
C2768
Combined sensor system
C2778
Steering angle sensor (abnormal battery voltage) system
(See DTC C2778.)
U1900
CAN communication system
U2516
CAN communication system

PID/DATA Monitor Table

PID name (definition)

Unit/Condition

Operation condition (reference)

Action

DSC HU/CM terminal

ABS_LAMP
(ABS warning light driver output state)
On/Off
• ABS warning light illuminated: On
• ABS warning light not illuminated: Off
Inspect the ABS warning light.
-
ABS_VOLT
(System battery voltage value)
V
• Ignition switch at ON: Approx. 12.2 V
• Idling: Approx. 14.1 V
Inspect power supply circuit.
K
ABSLF_I
(Left front ABS pressure retention solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSLF_O
(Left front ABS pressure reduction solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSLR_I
(Left rear ABS pressure retention solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSLR_O
(Left rear ABS pressure reduction solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSRF_I
(Right front ABS pressure retention solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSRF_O
(Right front ABS pressure reduction solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSRR_I
(Right rear ABS pressure retention solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
ABSRR_O
(Right rear ABS pressure reduction solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
BOO_ABS
(Brake pedal switch input)
On/Off
• Brake pedal depressed: On
• Brake pedal released: Off
Inspect the brake switch.
AD
BRAKE_LMP
(BRAKE system warning light output state)
On/Off
• Brake system warning light illuminated: On
• Brake system warning light not illuminated: Off
Inspect the brake system warning light.
-
CCNTABS
(Number of continuous codes)
-
• DTCs detected: 1-255
• No DTCs detected: 0
Perform the DTC inspection.
-
L_DSC O
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
LAT ACC
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.
G
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.
AJ, AL
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.
AH, AK
MCYLIP
kPa, psi, Bar
• Brake pedal released: 0 kPa, 0 psi, 0 Bar
• Brake pedal depressed: Changes according to the brake fluid pressure
Inspect the brake fluid pressure sensor.
-
PMPSTAT
(Pump motor output state)
On/Off
• Pump motor activated: On
• Pump motor not activated: Off
Inspect the DSC HU/CM.
-
R_DSC O
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
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.
AC, AE
RPM
(Engine speed signal input)
RPM
• Engine stopped: 0 RPM
• Engine speed at 3,000 rpm: 3,000 RPM
Inspect the PCM.
Inspect the instrument cluster.
-
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.
AF, AI
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.
-
TC LVAL
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
TC RVAL
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the DSC HU/CM.
-
TPI
%
• Closed throttle position: 0%
• Wide open throttle: Changes according to throttle valve opening angle
Inspect the throttle position sensor.
-
YAW_RATE
deg./s
• Vehicle stopped or driving straight: 0 deg./s
• Cornering to left: Changes 0 deg./s-negative
• Cornering to right: Changes 0 deg./s-positive
Inspect the combined sensor.
F

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_DSC_V
LF stability control solenoid valve
On/Off
LF_INLET
LF inlet solenoid valve
LF_OUTLET
LF outlet solenoid valve
LF_TC_VLV
LF traction control solenoid valve
LR_INLET
LR inlet solenoid valve
LR_OUTLET
LR outlet solenoid valve
PMP_MOTOR
Pump motor
RF_DSC_V
RF stability control solenoid valve
RF_INLET
RF inlet solenoid valve
RF_OUTLET
RF outlet solenoid valve
RF_TC_VLV
RF traction control solenoid valve
RR_INLET
RR inlet solenoid valve
RR_OUTLET
RR outlet solenoid valve
SAS_CAL
Steering angle sensor initialization start-up
TRUE/FALSE
YAWRATE
Combined sensor (yaw rate) initialization start-up
On/Off