ON-BOARD DIAGNOSIS [DSC/RSC]

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On-Board Diagnostic (OBD) Test Description

• The OBD test inspects the integrity and function of the DSC/RSC and outputs the results when requested by the specific tests.
• On-board diagnostic test also:

  ― Provides a quick inspection of the DSC/RSC 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/RSC 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

1. Connect the M-MDS to the DLC-2.

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

  • When using the IDS (laptop PC)
    1. Select “Self Test”.
    2. Select “Modules”.
    3. Select “ABS”.

  • When using the PDS (Pocket PC)
    1. Select “Module Tests”.
    2. Select “ABS”.
    3. Select “Self Test”.

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/RSC. (See Clearing DTCs Procedures.)

Clearing DTCs Procedures

1. Connect the M-MDS to the DLC-2.

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

  • When using the IDS (laptop PC)
    1. Select “Self Test”.
    2. Select “Modules”.
    3. Select “ABS”.

  • When using the PDS (Pocket PC)
    1. Select “Module Tests”.
    2. Select “ABS”.
    3. Select “Self Test”.

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. Turn the ignition switch to the OFF position.

6. Turn the ignition switch to the ON position 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.

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

  • When using the IDS (laptop PC)
    1. Select “DataLogger”.
    2. Select “Modules”.
    3. Select “ABS”.

  • When using the PDS (Pocket PC)
    1. Select “Module Tests”.
    2. Select “ABS”.
    3. Select “DataLogger”.

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.
  • When detecting DTCs, PIDs related to a malfunctioning system may not display even if the module is normal. Therefore, if a PID is not displayed, it is necessary to verify the DTC, perform malfunction diagnosis of the DTC that was detected, and do repairs.

Active Command Modes Procedure

1. Connect the M-MDS to the DLC-2.

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

  • When using the IDS (laptop PC)
    1. Select “DataLogger”.
    2. Select “Modules”.
    3. Select “ABS”.

  • When using the PDS (Pocket PC)
    1. Select “Module Tests”.
    2. Select “ABS”.
    3. Select “DataLogger”.

3. Select the active command modes from the PID table.

4. Perform the active command modes, 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.

DTC Table

DTC | System malfunction location | Page
--- | --- | ---
M-MDS
B1317 | Power supply system | (See DTC B1317, B1318 [DSC/RSC].)
B1318 | Power supply system | (See DTC B1317, B1318 [DSC/RSC].)
B1342 | DSC/RSC HU/CM system | (See DTC B1342, C1730 [DSC/RSC].)
C1095 | Pump motor, motor relay system | (See DTC C1095, C1096 [DSC/RSC].)
C1096 | Pump motor, motor relay system | (See DTC C1095, C1096 [DSC/RSC].)
C1115 | Valve relay system | (See DTC C1115, C1185 [DSC/RSC]
C1145 | RF ABS wheel-speed sensor (open circuit) system | (See DTC C1145, C1155, C1165, C1175 [DSC/RSC].)
C1155 | LF ABS wheel-speed sensor (open circuit) system | (See DTC C1145, C1155, C1165, C1175 [DSC/RSC].)
C1165 | RR ABS wheel-speed sensor (open circuit) system | (See DTC C1145, C1155, C1165, C1175 [DSC/RSC].)
C1175 | LR ABS wheel-speed sensor (open circuit) system | (See DTC C1145, C1155, C1165, C1175 [DSC/RSC].)
C1185 | Valve relay system | (See DTC C1115, C1185 [DSC/RSC]
C1194 | LF outlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1198 | LF inlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1210 | RF outlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1214 | RF inlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1222 | ABS wheel-speed sensor system | (See DTC C1222 [DSC/RSC].)
C1233 | LF ABS wheel-speed sensor/ABS sensor rotor system | (See DTC C1233, C1234, C1235, C1236 [DSC/RSC].)
C1234 | RF ABS wheel-speed sensor/ABS sensor rotor system | (See DTC C1233, C1234, C1235, C1236 [DSC/RSC].)
C1235 | RR ABS wheel-speed sensor/ABS sensor rotor system | (See DTC C1233, C1234, C1235, C1236 [DSC/RSC].)
C1236 | LR ABS wheel-speed sensor/ABS sensor rotor system | (See DTC C1233, C1234, C1235, C1236 [DSC/RSC].)
C1242 | LR outlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1246 | RR outlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1250 | LR inlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1254 | RR inlet solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1278 | Steering angle sensor system | (See DTC C1278, C1295, U2023 [DSC/RSC].)
C1280 | SAS control module system | (See DTC C1280, C1282, C1516, C1950, C2770 [DSC/RSC].)
C1282 | SAS control module system | (See DTC C1280, C1282, C1516, C1950, C2770 [DSC/RSC].)
C1288 | Brake fluid pressure sensor system | (See DTC C1288 [DSC/RSC]
C1295 | Steering angle sensor system | (See DTC C1278, C1295, U2023 [DSC/RSC].)
C1327 | Brake fluid level sensor system | (See DTC C1327 [DSC/RSC].)
C1329 | RF outlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1330 | LR outlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1331 | RR outlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1332 | LF outlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1333 | LR inlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1334 | LF inlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1335 | RF inlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1336 | RR inlet solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1404 | RH traction control solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1410 | LH traction control solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1446 | Brake switch system | (See DTC C1446 [DSC/RSC].)
C1516 | SAS control module system | (See DTC C1280, C1282, C1516, C1950, C2770 [DSC/RSC].)
C1527 | RH traction control solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1528 | LH traction control solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1530 | RH stability control solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1531 | LH stability control solenoid valve coil system | (See DTC C1329, C1330, C1331, C1332, C1333, C1334, C1335, C1336, C1527, C1528, C1530, C1531 [DSC/RSC].)
C1730 | DSC/RSC HU/CM system | (See DTC B1342, C1730 [DSC/RSC].)
C1950 | SAS control module system | (See DTC C1280, C1282, C1516, C1950, C2770 [DSC/RSC].)
C1957 | RH stability control solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1958 | LH stability control solenoid valve system | (See DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1404, C1410, C1957, C1958 [DSC/RSC].)
C1963 | SAS control module (Yaw rate sensor part) initial point correction error | (See DTC C1963 [DSC/RSC].)
C1991 | DSC/RSC sensor (abnormal initialization) system | (See DTC C1991 [DSC/RSC].)
C2770 | SAS control module system | (See DTC C1280, C1282, C1516, C1950, C2770 [DSC/RSC].)
U0073 | CAN system communication error | (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].) (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].)
U0100 | Communication error to PCM | (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].) (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].)
U0140 | Communication error to BCM | (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].) (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].)
U0155 | Communication error to instrument cluster | (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].) (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D.)].)
U1901 | SAS control module system (CAN2 line malfunction) | (See DTC U1901 [DSC/RSC].)
U2023 | Steering angle sensor system | (See DTC C1278, C1295, U2023 [DSC/RSC].)

PID/DATA Monitor Table

PID name (definition) | Unit/Condition | Operation condition (reference) | Action
--- | --- | --- | ---
ACCLMTR | 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 DISPLAY.) (See DTC TABLE.)
BOO_ABS (Brake pedal switch input) | Off/On | • Brake pedal released: Off • Brake pedal depressed: On | Inspect the brake switch. (See BRAKE SWITCH INSPECTION.)
CCNTABS (Number of continuous codes) | — | Indicates number of DTC | Perform the DTC inspection. (See DTC Table.)
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 | Perform the DTC inspection for the SAS control module. (See DTC DISPLAY.) (See DTC TABLE.)
MCYLI P | MPa, psi | • Brake pedal depressed: Changes according to the brake fluid pressure | Inspect the brake fluid pressure sensor. (See BRAKE FLUID PRESSURE SENSOR INSPECTION.)
PMP_MOTOR (Pump motor output state) | Off/On | • Pump motor not activated: Off • Pump motor activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
PWR_RLY (Valve relay output state) | Off/On | • Valve relay not activated: Off • Valve relay activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
ROLL_RATE (Roll rate sensor input) | °/s | • Vehicle stopped or driving straight: 0 °/s • Cornering to left: 0 °/s—positive • Cornering to right: 0 °/s—negative | Perform the DTC inspection for the SAS control module. (See DTC DISPLAY.) (See DTC TABLE.)
SHIFT_P (Transaxle gear position input) | Off/On | • Other than those above: Off • Selector lever position P: On | Inspect the TCM. (See TCM INSPECTION [AY6A-EL, AY6AX-EL].)
SWA_POS (Steering angle sensor input) | ° | • Steering wheel 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. (See STEERING ANGLE SENSOR INSPECTION.)
TCS_OFF_SW (TCS OFF switch input) | Off/On | • TCS OFF switch is released: Off • TCS OFF switch is depressed: On | Inspect the TCS OFF switch. (See TCS OFF SWITCH INSPECTION.)
V_LF_INL (Left front inlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_LF_OTL (Left front outlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_LR_INL (Left rear inlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_LR_OTL (Left rear outlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_RF_INL (Right front inlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_RF_OTL (Right front outlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_RR_INL (Right rear inlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_RR_OTL (Right rear outlet solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_STB_L (LH stability control solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_STB_R (RH stability control solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_TRC_L (LH traction control solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
V_TRC_R (RH traction control solenoid valve output state) | Off/On | • Solenoid valve not activated: Off • Solenoid valve activated: On | Inspect the DSC/RSC HU/CM. (See DSC/RSC SYSTEM INSPECTION.)
WSPD_LF (Left front ABS wheel-speed sensor input) | 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_LR (Left rear ABS wheel-speed sensor input) | KPH, MPH | • Vehicle stopped: 0 KPH, 0 MPH • Vehicle running: vehicle speed | Inspect the rear ABS wheel-speed sensor. (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [2WD].) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [4WD].)
WSPD_RF (Right front ABS wheel-speed sensor input) | 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_RR (Right rear ABS wheel-speed sensor input) | KPH, MPH | • Vehicle stopped: 0 KPH, 0 MPH • Vehicle running: vehicle speed | 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 | °/s | • Vehicle stopped or driving straight: 0 °/s • Cornering to left: Changes 0 °/s—negative • Cornering to right: Changes 0 °/s—positive | Perform the DTC inspection for the SAS control module. (See DTC DISPLAY.) (See DTC TABLE.)

Active Command Modes Table

Command name | Output part | Operation | Operating condition
--- | --- | --- | ---
PMP_MOTOR | Pump motor | Off/On | Ignition switch at ON
PWR_RLY | Valve relay
SSR_INTL | DSC/RSC sensor initialization
V_LF_INL | LF inlet solenoid valve
V_LF_OTL | LF outlet solenoid valve
V_LR_INL | LR inlet solenoid valve
V_LR_OTL | LR outlet solenoid valve
V_RF_INL | RF inlet solenoid valve
V_RF_OTL | RF outlet solenoid valve
V_RR_INL | RR inlet solenoid valve
V_RR_OTL | RR outlet solenoid valve
V_STB_L | LH stability control solenoid valve
V_STB_R | RH stability control solenoid valve
V_TRC_L | LH traction control solenoid valve
V_TRC_R | RH traction control solenoid valve