ON-BOARD DIAGNOSIS [ABS]

id040201805500

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 the WDS or equivalent to the vehicle DLC-2 connector.

2. Retrieve DTC using the WDS or equivalent.

Clearing DTCs Procedures

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

2. Erase DTC using the WDS or equivalent.

3. Ensure that the customer's concern has been resolved.

PID/Data Monitor and Record Procedure

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

2. Access and monitor PIDs using the WDS or equivalent.

Active Command Modes Procedure

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

2. Turn the ignition switch to the ON position (engine off) or start the engine.

3. Activate active command modes using the WDS or equivalent.

DTC Table

DTC

System malfunction location

Page

WDS or

equivalent

B1317
Power supply system
B1318
Power supply system
B1342
ABS HU/CM (internal malfunction)
C1095
Pump motor, motor relay
C1141
LF ABS sensor rotor
C1142
RF ABS sensor rotor
C1143
LR ABS sensor rotor
C1144
RR ABS sensor rotor
C1145
RF ABS wheel-speed sensor
C1155
LF ABS wheel-speed sensor
C1165
RR ABS wheel-speed sensor
C1175
LR ABS wheel-speed sensor
C1233
LF ABS wheel-speed sensor/ABS sensor rotor
C1234
RF ABS wheel-speed sensor/ABS sensor rotor
C1235
RR ABS wheel-speed sensor/ABS sensor rotor
C1236
LR ABS wheel-speed sensor/ABS sensor rotor
C1267
ABS HU/CM (internal malfunction)
C1446
Brake switch
U1900
CAN line
U2012
CAN line
U2523
CAN line

PID/DATA Monitor Table

PID name

(definition)

Unit/Condition

Operation condition (reference)

Action

ABS HU/CM terminal

BOO_ABS
(Brake pedal switch input)
On/Off
• Brake pedal depressed: On
• Brake pedal released: Off
Inspect the brake switch.
-
CCNTABS
(Number of continuous codes)
-
• DTCs detected:

1-255

• No DTCs detected: 0
Perform the DTC inspection.
-
LF_WSPD
(Left front ABS wheel-speed sensor input)
KPH, MPH
• Vehicle stopped: 0 KPH, 0 MPH
• Vehicle running: Vehicle speed
Inspect the ABS wheel-speed sensor.
I, K
LR_WSPD
(Left rear ABS wheel-speed sensor input)
KPH, MPH
• Vehicle stopped: 0 KPH, 0 MPH
• Vehicle running: Vehicle speed
Inspect the ABS wheel-speed sensor.
U, W
RF_WSPD
(Right front ABS wheel-speed sensor input)
KPH, MPH
• Vehicle stopped: 0 KPH, 0 MPH
• Vehicle running: Vehicle speed
Inspect the ABS wheel-speed sensor.
Q, O
RR_WSPD
(Right rear ABS wheel-speed sensor input)
KPH, MPH
• Vehicle stopped: 0 KPH, 0 MPH
• Vehicle running: Vehicle speed
Inspect the ABS wheel-speed sensor.
E, C

Active Command Modes Table

Command name

Output part

Operation

Operating condition

LF_INLET
LF inlet solenoid valve
On/Off
Ignition switch at ON
LF_OUTLET
LF outlet solenoid valve
LR_INLET
LR inlet solenoid valve
LR_OUTLET
LR outlet solenoid valve
PMP_MOTOR
Pump motor
RF_INLET
RF inlet solenoid valve
RF_OUTLET
RF outlet solenoid valve
RR_INLET
RR inlet solenoid valve
RR_OUTLET
RR outlet solenoid valve