ON-BOARD DIAGNOSTIC SYSTEM FUNCTION

id040200110300


Malfunction Detection Function

•  The malfunction detection function detects malfunctions in the input/output signal system of the dynamic stability control (DSC)/roll stability control (RSC) hydraulic unit (HU)/control module (CM) when the ignition switch is at the switch on (ON) position.
•  When the DSC/RSC HU/CM are started up, the following malfunction detections are performed.
―  The antilock brake system (ABS) and brake system warning lights, traction control system (TCS) switch off (OFF) and DSC indicator lights illuminate for approx. 3 s when the ignition switch is turned to the ON position. At the same time, the fail-safe relay is operated, and the input/output signals of each part is monitored for malfunction diagnosis. After starting to drive, the first time the vehicle speed is approx. 15 km/h {9.3 mph} or more the pump motor is operated and malfunction diagnosis is performed again.
•  When malfunctions are detected, the corresponding lights are illuminated to alert the driver. Using the external tester communication function, DTCs can be output through the HS_CAN_H and HS_CAN_L of the DLC-2. At the same time, malfunction detection results are sent to the memory and fail-safe functions.

Memory Function

•  The memory function stores DTCs of malfunctions in input/output signal systems. With this function, once a DTC is stored it is not cleared after the ignition switch has been turned off (LOCK position), even if the malfunctioning signal system has returned to normal.
•  Since the DSC/RSC HU/CM has a built-in non-volatile memory, DTCs are not cleared even if the battery is removed. Therefore, it is necessary to clear the memory after performing repairs. Refer to the Workshop Manual for the DTC clearing procedure.

Fail-safe Function

•  When the malfunction detection function determines a malfunction, each light illuminates to advise the driver. At this time, the fail-safe function controls the ABS, electronic brakeforce distribution (EBD), TCS, DSC and RSC as shown in the fail-safe function table.
Warning
•  If EBD control is suspended the rear wheels could lock-up before the front wheels. If this occurs, the vehicle could swerve and become unstable. Therefore always inspect the system immediately if EBD control is suspended.

Fail-safe Function Malfunction Contents

Malfunction location

DTC number

Fail-safe function

Warning light illumination status

Control status

ABS warning light

Brake system warning light (when parking brake is released)

DSC indicator light

TCS OFF light

ABS control

EBD Control

TCS control

DSC control

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