ABS ON-BOARD DIAGNOSIS

id040200875600


On-Board Diagnostic (OBD) Test Description

•  The OBD test inspects the integrity and function of the ABS and outputs the results when requested by the specific tests.
•  On-board diagnostic test also:
―  Provides a quick inspection of the ABS 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 ABS 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.

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2.  Retrieve DTC by WDS or equivalent.


Clearing DTCs Procedures

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

2.  Erase DTC by 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.

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2.  Access and monitor PIDs by WDS or equivalent.


Active Command Modes Procedure

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

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2.  Turn the ignition switch to ON (Engine OFF) or start engine.

3.  Activate active command modes using WDS or equivalent.


DTC Table

DTC

Diagnosis system component

Page

WDS or equiva-

lent
B1317
ABS power supply
(See DTC B1317, B1318.)
B1318
ABS power supply
(See DTC B1317, B1318.)
B1342
ABS CM
(See DTC B1342.)
C1095
Motor relay, pump motor
(See DTC C1095.)
C1141
Left front ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1142
Right front ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1143
Left rear ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1144
Right rear ABS sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1145
Right front ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175.)
C1155
Left front ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175.)
C1165
Right rear ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175.)
C1175
Left rear ABS wheel-speed sensor
(See DTC C1145, C1155, C1165, C1175.)
C1233
Left front ABS wheel-speed sensor/sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1234
Right front ABS wheel-speed sensor/sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1235
Right rear ABS wheel-speed sensor/sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1236
Left rear ABS wheel-speed sensor/sensor rotor
(See DTC C1141, C1142, C1143, C1144, C1233, C1234, C1235, C1236.)
C1267
ABS CM internal failure
(See DTC C1267.)
C1446
Brake light switch
(See DTC C1446.)
U2012
CAN communication
(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM])
U2523
CAN communication
(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM])


PID/DATA Monitor Table

PID Name

(Definition)

Unit/Condition

Condition/Specification

Action

ABS HU/CM terminal
BOO_ABS
(Brake pedal switch input)
On/Off
•  Brake pedal is depressed: On
•  Brake pedal is released: Off
Inspect brake switch.
V
CCNTABS
(Number of continuous codes)
—
•  DTC is detected: 1—255
•  DTC is not detected: 0
Perform inspection using appropriate DTC.
—
LF_WSPD
(Left front ABS wheel-speed sensor input)
KPH or MPH
•  Vehicle is stopped: 0 KPH {0 MPH}
•  Vehicle is driving: Indicates vehicle speed
Inspect LF ABS wheel-speed sensor/sensor rotor.
I, K
LR_WSPD
(Left rear ABS wheel-speed sensor input)
KPH or MPH
•  Vehicle is stopped: 0 KPH {0 MPH}
•  Vehicle is driving: Indicates vehicle speed
Inspect LR ABS wheel-speed sensor/sensor rotor.
U, W
RF_WSPD
(Right front ABS wheel-speed sensor input)
KPH or MPH
•  Vehicle is stopped: 0 KPH {0 MPH}
•  Vehicle is driving: Indicates vehicle speed
Inspect RF ABS wheel-speed sensor/sensor rotor.
Q, O
RR_WSPD
(Right rear ABS wheel-speed sensor input)
KPH or MPH
•  Vehicle is stopped: 0 KPH {0 MPH}
•  Vehicle is driving: Indicates vehicle speed
Inspect RR ABS wheel-speed sensor/sensor rotor.
E, C


Active Command Modes Table

Command Name

Definition

Operation

Note
PMP_MOTOR
ABS motor
On/Off
Ignition key at ON
(Engine running, vehicle is not moving)
LF_INLET
Left front ABS pressure retention solenoid valve
On/Off
LF_OUTLET
Left front ABS pressure reduction solenoid valve
On/Off
LR_OUTLET
Left rear ABS pressure reduction solenoid valve
On/Off
LR_INLET
Left rear ABS pressure retention solenoid valve
On/Off
RF_INLET
Right front ABS pressure retention solenoid valve
On/Off
RF_OUTLET
Right front ABS pressure reduction solenoid valve
On/Off
RR_INLET
Right rear ABS pressure retention solenoid valve
On/Off
RR_OUTLET
Right rear ABS pressure reduction solenoid valve
On/Off