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

id0402b2800200

On-Board Diagnostic (OBD) Test Description

―  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.

―  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 M-MDS.

Reading DTCs Procedure

CMDTC self test

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “Self Test”.

(2)  Select “All CMDTCs”.

3.  Verify the DTC according to the directions on the screen.

•  If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.

4.  After completion of repairs, clear all DTCs stored in the DSC. (See Clearing DTCs Procedure.)

ODDTC self test

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “Self Test”.

(2)  Select “Modules”.

(3)  Select “ABS”.

3.  Verify the DTC according to the directions on the screen.

•  If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.

4.  After completion of repairs, clear all DTCs stored in the DSC. (See Clearing DTCs Procedure.)

Clearing DTCs Procedure

CMDTC clearing DTCs procedure

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “Self Test”.

(2)  Select “All CMDTCs”.

3.  Verify the DTC according to the directions on the screen.

4.  Press the clear button on the DTC screen to clear the DTC.

5.  Switch the ignition to off.

6.  Switch the ignition ON (engine off) and wait for 5 s or more.

7.  Perform DTC inspection. (See Reading DTCs Procedure.)

8.  Verify that no DTCs are displayed.

ODDTC clearing DTCs procedure

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “Self Test”.

(2)  Select “Modules”.

(3)  Select “ABS”.

3.  Verify the DTC according to the directions on the screen.

4.  Press the clear button on the DTC screen to clear the DTC.

5.  Switch the ignition to off.

6.  Switch the ignition ON (engine off) and wait for 5 s or more.

7.  Perform DTC inspection. (See Reading DTCs Procedure.)

8.  Verify that no DTCs are displayed.

PID/Data Monitor and Record Procedure

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “DataLogger”.

(2)  Select “Modules”.

(3)  Select “ABS”.

3.  Select the applicable PID from the PID table.

4.  Verify the PID data according to the directions on the screen.

Note

•  The PID data screen function is used for monitoring the calculated value of input/output signals in the module.Therefore, if the monitored value of the output parts is not within the specification, it is necessary to inspect the monitored value of input parts corresponding to the applicable output part control. In addition, because the system does not display an output part malfunction as an abnormality in the monitored value, it is necessary to inspect the output parts individually.

Active Command Modes Procedure

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “DataLogger”.

(2)  Select “Modules”.

(3)  Select “ABS”.

3.  Select the simulation items from the PID table.

4.  Perform the active command modes function, inspect the operations for each parts.

•  If the operation of output parts cannot be verified after the active command mode inspection is performed, this could indicate the possibility of an open or short circuit, sticking, or operation malfunction in the output parts.

Snapshot Data Access Procedure

1.  Connect the M-MDS to the DLC-2.

2.  After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

(1)  Select “Self Test”.

(2)  Select “Modules”.

(3)  Select “ABS”.

3.  Then, select the “Retrieve CMDTCs” and perform procedures according to directions on the M-MDS screen.

4.  Retrieve the snapshot data according to the directions on the M-MDS screen.

Note

•  Snapshot data appears at the top of the help screen when the displayed DTC is selected.

•  The snapshot data stores the currently detected DTC data.

DTC Table

Fail-safe Function Malfunction Contents

PID/DATA Monitor Table

PID name (definition)	Unit/Condition	Operation condition (reference)	Action
BRAKE_SW	Off/On	•  Brake pedal released: Off •  Brake pedal depressed: On	Inspect the brake switch. (See BRAKE SWITCH INSPECTION.)
BRK_F_P_C (Calculated Value)	Pa, psi	•  Brake pedal depressed: Changes according to the brake fluid pressure	Inspect the brake fluid pressure sensor. (See BRAKE FLUID PRESSURE SENSOR INSPECTION.)
BRK_F_P_R (Raw Value)
DDS_MODE	Not_Learned/Learning/Learned	•  During initialization: Not_Learned •  During learning: Learning •  Learning completed*: Learned	Perform the DTC inspection for the DSC HU/CM. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
DSC_OFF_SW	Off/On	•  TCS OFF switch is released: Off •  TCS OFF switch is depressed: On	Inspect the TCS OFF switch. (See TCS OFF SWITCH INSPECTION.)
DSC_ST	Off/On	•  During TCS OFF mode: Off •  Other than TCS OFF mode: On	Perform the DTC inspection for the DSC HU/CM. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
LAT_ACCL_C (Calculated Value)	G	•  Vehicle stopped or driving at constant speed: 0 G •  Cornering to left: Changes 0 G—positive •  Cornering to right: Changes 0 G—negative	Perform the DTC inspection for the SAS control module. (See DTC INSPECTION [SAS CONTROL MODULE].)
LAT_ACCL_R (Raw Value)
LON_ACCL_C (Calculated Value)	G	•  Vehicle stopped or driving at constant speed: 0 G •  Vehicle is driving at a acceleration: Changes 0 G—positive •  Vehicle is driving at a deceleration: Changes 0 G—negative	Perform the DTC inspection for the SAS control module. (See DTC INSPECTION [SAS CONTROL MODULE].)
LON_ACCL_R (Raw Value)
P_BRAKE_SW	Off/On	•  Electric parking brake is released: OFF •  Electric parking brake is applied: ON	Inspect the electric parking brake switch. (See ELECTRIC PARKING BRAKE SWITCH INSPECTION.)
PMP_MT	Note •  Displays in the M-MDS but it does not operate.
PMP_MT_SP
R_GEAR_SW	Off/On	•  Except shift/selector lever at R position: Off •  Shift/selector lever at R position: On	Inspect the PCM. (MTX) (See PCM INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See PCM INSPECTION [SKYACTIV-D 2.2].) Inspect the TCM. (ATX) (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FW6A-EL, FW6AX-EL].)
STR_ANG_C (Calculated Value)	°	•  Steering wheel in neutral position (not turned): 0° •  Steering wheel turned to left: Changes 0°—positive •  Steering wheel turned to right: Changes 0°—negative Note •  Constantly indicates 0° until the steering wheel angle neutral position determination by the DSC HU/CM is completed. •  The steering wheel angle neutral position determination by the DSC HU/CM is completed when the vehicle is driven in a straight line at a speed of 20 km/h or more for several seconds.	Perform the DTC inspection for the PCM, DSC HU/CM, and EPS CM. If a DTC is displayed after performing the DTC inspection for the PCM, DSC HU/CM, and EPS CM, repair the malfunctioning part according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2]) (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) (See EPS CONTROL MODULE INSPECTION.) After performing the DTC inspection, perform the following procedures: •  Start the engine and drive the vehicle in a straight line at a speed of 20 km/h or more for several seconds. If an abnormal value is indicated after verifying the value of the STR_ANG_C again, replace the DSC HU/CM.
STR_ANG_R (Raw Value)		•  Steering wheel position when ignition is switched ON (engine off or on): 0° •  Steering wheel turned to left: Changes 0°—positive •  Steering wheel turned to right: Changes 0°—negative Note •  The signal displayed in this item is a steering angle (relative angle) signal output from the EPS CM.	Inspect the following PID. •  STR_ANG (See EPS CONTROL MODULE INSPECTION.)
TPMS_TYPE	No_DDS/DDS+TOM_EU/DDS+TOM_US	•  TPMS not equipped: No_DDS •  TPMS equipped (Corresponding to European regulations): DDS+TOM_EU •  TPMS equipped (Corresponding to U.S. regulations): DDS+TOM_US	Perform the DTC inspection for the DSC HU/CM. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
V_INLET_LF	Off/On	•  Solenoid valve not activated: Off •  Solenoid valve activated: On	Inspect the DSC HU/CM. (See DSC HU/CM INSPECTION.)
V_INLET_LR
V_INLET_RF
V_INLET_RR
V_OUTLET_LF
V_OUTLET_LR
V_OUTLET_RF
V_OUTLET_RR
V_STB_LF/RR	Note •  Displays in the M-MDS but it does not operate.
V_STB_RF/LR
V_TRC_LF/RR	Note •  Displays in the M-MDS but it does not operate.
V_TRC_RF/LR
VPWR_B_SOL	V	•  Ignition switched ON (engine off): Approx. 12.2 V •  Idling: Approx. 14.1 V	Inspect power supply circuit. (See DSC HU/CM INSPECTION.)
VSPD	KPH, MPH	•  Vehicle stopped: 0 KPH, 0 MPH •  Vehicle running: Vehicle speed	Inspect the DSC HU/CM. (See DSC HU/CM INSPECTION.)
WSPD_SEN_LF	KPH, MPH	•  Vehicle stopped: 0 KPH, 0 MPH •  Vehicle running: Vehicle speed	Inspect the front ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.)
WSPD_SEN_LR			Inspect the rear ABS wheel-speed sensor. (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [2WD].) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [4WD].)
WSPD_SEN_RF			Inspect the front ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.)
WSPD_SEN_RR			Inspect the rear ABS wheel-speed sensor. (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [2WD].) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [4WD].)
YAW_RATE_C (Calculated Value)	°/s	•  Vehicle stopped or driving straight: 0 °/s •  Cornering to left: Changes 0 °/s—positive •  Cornering to right: Changes 0 °/s—negative	Perform the DTC inspection for the SAS control module. (See DTC INSPECTION [SAS CONTROL MODULE].)
YAW_RATE_R (Raw Value)

Snapshot Data Table

Note

•  Refer to PID monitor table for confirm the DSC system operation status while the DSC CM does not store the DTC. (See PID/DATA Monitor Table.)

•  Snapshot data items are not displayed, according to detected DTC.

Active Command Modes Table

Command name	Output part	Operation	Operating condition
PMP_MT_SP	Pump motor	Off/On	Switch the ignition ON (engine off)
V_INLET_LF	LF inlet solenoid valve
V_INLET_LR	LR inlet solenoid valve
V_INLET_RF	RF inlet solenoid valve
V_INLET_RR	RR inlet solenoid valve
V_OUTLET_LF	LF outlet solenoid valve
V_OUTLET_LR	LR outlet solenoid valve
V_OUTLET_RF	RF outlet solenoid valve
V_OUTLET_RR	RR outlet solenoid valve
V_STB_LF/RR	LF/RR stability control solenoid valve
V_STB_RF/LR	RF/LR stability control solenoid valve
V_TRC_LF/RR	LF/RR traction control solenoid valve
V_TRC_RF/LR	RF/LR traction control solenoid valve