ON-BOARD DIAGNOSTIC SYSTEM FUNCTION
id040200175100
Malfunction Detection Function
• The malfunction detection function detects malfunctions in the input/output signal system of the ABS (ABS/TCS) HU/CM or DSC HU/CM when the ignition switch is at the ON position.
• When the ABS (ABS/TCS) HU/CM and DSC HU/CM are started up, the following malfunction detections are performed.
ABS (ABS/TCS) HU/CM
-
- The ABS and brake system warning lights, TCS indicator light, and TCS OFF light illuminate for approx. 2.4 s when the ignition switch is turned to the ON position to inspect for open circuits in the lights. 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. 10 km/h {6.2 mph} or more the pump motor is operated and malfunction diagnosis is performed again. Input/output signals are monitored for malfunction determination when the ignition switch is at the ON position.
DSC HU/CM
-
- The ABS and brake system warning lights, DSC indicator light, and DSC OFF light illuminate for approx. 2.4 s when the ignition switch is turned to the ON position to inspect for open circuits in the lights. 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. 10 km/h {6.2 mph} or more the pump motor is operated and malfunction diagnosis is performed again. Input/output signals are monitored for malfunction determination when the ignition switch is at the ON position.
• 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 KLN terminal 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 ABS (ABS/TCS) and DSC control modules have 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, EBD, TCS*1 and DSC*2 as shown in the fail-safe function table.
*1: Vehicles with ABS/TCS or DSC
*2: Only vehicles with DSC
-
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 Table (Vehicles With ABS (ABS/TCS))
|
Malfunction location
|
DTC
|
Fail-safe function
|
|
WDS
or equivalent
|
Warning light illumination condition
|
Control condition
|
|
ABS warning light
|
BRAKE system warning light (when parking brake is released)
|
TCS indicator light
|
TCS OFF light
|
ABS control
|
EBD control
|
TCS control
|
|
ABS wheel-speed sensor
|
C1145
|
Illuminated
*1
|
Not illuminated *1, *2
|
Illuminated
*4
|
Illuminated
*4
|
Control disabled
|
Control enabled *3
|
Control disabled
|
|
C1155
|
|
C1165
|
|
C1175
|
|
ABS wheel-speed sensor/ABS sensor rotor
|
C1148
|
|
C1158
|
|
C1168
|
|
C1178
|
|
C1233
|
|
C1234
|
|
C1235
|
|
C1236
|
|
Solenoid valve
|
C1194
|
Illuminated
*4
|
Illuminated
*4, *5
|
Illuminated
*1
|
Not Illuminated
|
Control disabled
|
Control disabled*6
|
Control enabled
|
|
C1198
|
|
C1210
|
|
C1214
|
|
C1242
|
|
C1246
|
|
C1250
|
|
C1254
|
|
Solenoid valve, ABS motor or ABS wheel-speed sensor/sensor rotor
|
C1510
|
Illuminated
|
Not illuminated*2
|
Illuminated
|
Illuminated
|
Control disabled
|
Control enabled *3
|
Control disabled*9
|
|
C1511
|
|
C1512
|
|
C1513
|
|
TCS control
|
C1508
|
Not illuminated
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
|
Fail-safe relay
|
C1186
|
Illuminated
|
Illuminated
|
Not Illuminated
|
Illuminated
|
Control disabled
|
Control disabled
|
Control enabled
|
|
C1266
|
Not Illuminated
|
Control enabled
|
|
ABS motor and/or ABS motor relay
|
C1095
|
Illuminated
*1
|
Not illuminated
|
Illuminated
*1
|
Not illuminated
|
Control disabled
|
Control enabled
|
Control enabled
|
|
C1096
|
Control enabled
|
|
ABS (ABS/TCS) HU/CM
|
B1342
|
Illuminated
*7
|
Illuminated
*7
|
Illuminated
*7
|
Illuminated
*10
|
Control disabled*8
|
Control disabled*8
|
Control disabled
|
|
Power supply system
|
B1318
|
Illuminated
|
Illuminated
|
Illuminated
|
Illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
|
ABS (ABS/TCS) HU/CM (pump)
|
C1140
|
Illuminated
|
Not illuminated
|
Not illuminated
*11
|
Not illuminated
|
Control disabled
|
Control enabled
|
Control enabled
|
|
ABS (ABS/TCS) unit mismatched installation
|
C1414
|
Illuminated
*12
|
Not illuminated
|
Illuminated
|
Illuminated
*12
|
Control disabled
|
Control enabled
|
Control disabled
*13
|
|
Module configuration
|
B2477
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
|
CAN communication
|
U0073
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
|
U0100
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
|
U0101
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
|
U0155
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
|
U2021
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
-
*1 :
If a malfunction was detected in the previous drive cycle, the light remains illuminated until the system is verified to be normal when the vehicle is driven at a speed of 10 km/h {6.2 mph} or more.
-
*2 :
The warning light illuminates during rear wheel malfunction.
-
*3 :
Suspends control when there is malfunction in both rear wheels.
-
*4 :
If a malfunction was detected in the previous drive cycle, the light remains illuminated until the wheel-speed sensor is verified to be normal.
-
*5 :
In case that the solenoid valve in the front wheel is stuck on, the light does not illuminate.
-
*6 :
Control does not stop during each solenoid valves (except rear inlet solenoid valve) stuck off malfunction.
-
*7 :
If malfunction is related to CAN or configuration, light does not illuminate.
-
*8 :
If malfunction is related to CAN or configuration, system control is not suspended.
-
*9 :
Control is not suspended when pressure reduction in operation is detected.
-
*10 :
If the module is not configurated, light flashes.
-
*11 :
If malfunction is related to CAN (engine speed), the light illuminates.
-
*12 :
When there is engine information mismatch installed, the light does not illuminate.
-
*13 :
When there is engine information mismatch, system control is not suspended.
Fail-safe Function Table (Vehicles With DSC)
|
Malfunction location
|
DTC
|
Fail-safe function
|
|
WDS
or equiva-lent
|
Warning light illumination condition
|
Control condition
|
|
ABS warning light
|
BRAKE system warning light (when parking brake is released)
|
DSC indicator light
|
DSC OFF light
|
ABS control
|
EBD control
|
TCS control
|
DSC control
|
Brake assist control
|
|
Brake fluid pressure sensor
|
C1953
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled*1
|
Control disabled
|
Control disabled
|
|
C1954
|
|
Combined sensor (lateral-G, yaw rate)
|
C1280
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
Control disabled
|
Control enabled
|
|
C1730
|
|
C1951
|
|
C1952
|
|
C1959
|
|
Combined sensor (forward-G)
|
C1949
|
Illuminated
|
Not illuminated
|
Illuminated
|
Illuminated
|
Control disabled
|
Control enabled
|
Control disabled
|
Control disabled
|
Control disabled
|
|
C1950
|
|
ABS wheel-
speed sensor
|
C1145
|
Illuminated*1
|
Not illuminated *1, *2
|
Illuminated*1
|
Illuminated*1
|
Control disabled
|
Control enabled *3
|
Control disabled
|
Control disabled
|
Control disabled
|
|
C1155
|
|
C1165
|
|
C1175
|
|
ABS wheel-
speed sensor/ABS sensor rotor
|
C1148
|
|
C1158
|
|
C1168
|
|
C1178
|
|
C1233
|
|
C1234
|
|
C1235
|
|
C1236
|
|
Engine control system
|
C1119
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated*22
|
Control enabled
|
Control enabled
|
Control disabled
|
Control disabled
|
Control enabled
|
|
Control enabled
|
Control enabled
|
|
Control disabled*5
|
|
Control disabled*4
|
Control disabled*6
|
|
Solenoid valve
|
C1194
|
Illuminated*7, *8
|
Illuminated*8, *9
|
Illuminated*7
|
Not illuminated
|
Control disabled*10
|
Control disabled*11
|
Control disabled*12
|
Control disabled
|
Control disabled
|
|
C1198
|
|
C1210
|
|
C1214
|
|
C1242
|
|
C1246
|
|
C1250
|
|
C1254
|
|
C1400
|
|
C1410
|
|
C1957
|
|
C1957
|
|
C1958
|
|
DSC HU/CM (pump)
|
C1140
|
Illuminated
|
Not illuminated
|
Not illuminated*13
|
Not illuminated
|
Control disabled
|
Control enabled
|
Control disabled*12
|
Control disabled
|
Control disabled
|
|
Solenoid valve, motor or ABS wheel-speed sensor/ABS sensor rotor
|
C1510
|
Not illuminated*2
|
Illuminated
|
Control enabled *3
|
Control disabled*14
|
|
C1511
|
|
C1512
|
|
C1513
|
|
DSC control
|
C1507
|
Not illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
|
C1508
|
|
Fail-safe relay
|
C1186
|
Illuminated
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Control disabled
|
Control disabled
|
Control disabled*12
|
Control disabled
|
Control disabled
|
|
C1266
|
Illuminated
|
Control enabled
|
|
Motor relay, pump motor
|
C1095
|
Illuminated*1
|
Not illuminated
|
Illuminated*1
|
Not illuminated
|
Control disabled
|
Control enabled
|
Control disabled*12
|
Control disabled
|
Control disabled
|
|
C1096
|
|
DSC HU/CM
|
B1342
|
Illuminated*15, *16
|
Illuminated*15, *16
|
Illuminated*16, *17
|
Illuminated*17
|
Control disabled
*18, *19
|
Control disabled
*18, *19
|
Control disabled*19
|
Control disabled
|
Control disabled
*20
|
|
DSC power supply
|
B1318
|
Illuminated
|
Illuminated
|
Illuminated
|
Illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
Control enabled
|
Control enabled
|
|
DSC HU/CM
|
C1414
|
Illuminated*21
|
Not illuminated
|
Illuminated*21
|
Illuminated
|
Control disabled
|
Control enabled
|
Control disabled
|
Control disabled
|
Control disabled
|
|
Steering angle sensor
|
C1955
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
Control disabled
|
Control enabled
|
|
C1956
|
|
Brake fluid level sensor
|
C1125
|
Not illuminated
|
illuminated*22
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled*12
|
Control disabled
|
Control disabled
|
|
Reverse signal
|
B1627
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
Control disabled
|
Control enabled
|
|
Brake switch
|
B1483
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
Control enabled
|
Control disabled
|
|
B1484
|
|
B1486
|
|
Module configuration
|
B2477
|
Not illuminated
|
Not illuminated
|
Flash
|
Flash
|
Control enabled
|
Control enabled
|
Control disabled
|
Control disabled
|
Control disabled
|
|
CAN communi-cation
|
U0073
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Illuminated
|
Control enabled
|
Control enabled
|
Control disabled
|
Control disabled
|
Control disabled
|
|
U0100
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled*23
|
Control disabled*23
|
Control enabled
|
|
U0101
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control enabled
|
Control enabled
|
Control enabled
|
|
U0114
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
-
|
Control enabled
|
Control enabled
|
|
U0155
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
Control disabled*12
|
Control disabled
|
Control enabled
|
|
U2511
|
Not illuminated
|
Not illuminated
|
Illuminated
|
Not illuminated
|
Control enabled
|
Control enabled
|
-
|
Control enabled
|
Control enabled
|
-
*1 :
If a malfunction was detected in the previous driving mode, the light remains illuminated until the system is verified to be normal when the vehicle is driven at a speed of 10 km/h {6.2 mph} or more.
-
*2 :
The warning light illuminates during rear wheel malfunction.
-
*3 :
Stops control when there is malfunction in both rear wheels.
-
*4 :
When engine control system has malfunction, only brake TCS is enable.
-
*5 :
When engine speed signal has malfunction, only brake DSC is enable.
-
*6 :
When engine control system has malfunction, only brake DSC is enable.
-
*7 :
If a malfunction was detected in the previous driving mode, the light remains illuminated until the wheel-speed sensor is verified to be normal.
-
*8 :
The warning light does not illuminates only during stability control solenoid valve or traction switch solenoid valve off stuck malfunction.
-
*9 :
The warning light illuminates during rear solenoid valves off stuck malfunction.
-
*10 :
Control dose not stop during stability control solenoid valves or traction switch solenoid valve off stuck malfunction.
-
*11 :
Control does not stop during each solenoid valves (except rear inlet solenoid valve) off stuck malfunction.
-
*12 :
Engine TCS is only enable
-
*13 :
If malfunction is related to DSC performance, the light illuminates.
-
*14 :
Engine TCS is only enable when impossibility of pressure reduction in operation is detected.
-
*15 :
If malfunction is related to CAN, light does not illuminate.
-
*16 :
If malfunction is related to combine sensor 0 point adjustment or configuration, light dose not illuminate.
-
*17 :
If the module does not configured, light flashes.
-
*18 :
If malfunction is related to CAN, system does not disabled.
-
*19 :
If malfunction is related to combine sensor 0 point adjustment or configuration, system dose not disabled.
-
*20 :
If malfunction is related to combined sensor 0 point adjustment, system does not disabled.
-
*21 :
When vehicle data is mismatch installed, the light does not illuminate.
-
*22 :
The light will go out when the failure is solved.
-
*23 :
The control is permitted according to the malfunction.