ON-BOARD DIAGNOSIS [ABS]

id0402a7805500

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 M-MDS.

Reading DTCs Procedure

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

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

• When using the IDS (laptop PC)
1. Select the "Toolbox" tab.
2. Select "Self Test".
3. Select "Modules".
4. 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 ABS. (See Clearing DTCs Procedures.)

Clearing DTCs Procedures

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

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

• When using the IDS (laptop PC)
1. Select the "Toolbox" tab.
2. Select "Self Test".
3. Select "Modules".
4. 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. Verify that no DTCs are displayed.

PID/Data Monitor and Record Procedure

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

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

• When using the IDS (laptop PC)
1. Select the "Toolbox" tab.
2. Select "DataLogger".
3. Select "Modules".
4. 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 monitor function is used for monitoring the calculated value. Therefore, if the monitored value of the output parts is not within the specification, inspection of the monitored value of input parts corresponding to applicable output part control is necessary. In addition, because the system does not display output part malfunction as abnormality in the monitored value, it is necessary to inspect the output part individually using a active command modes function.

Active Command Modes Procedure

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

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

• When using the IDS (laptop PC)
1. Select the "Toolbox" tab.
2. Select "DataLogger".
3. Select "Modules".
4. 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 there is no operation sound from the relay, motor, and solenoid after the active command mode inspection is performed, it is possible that there is an open or short circuit in the wiring harness, relay, motor or solenoid, or sticking and operation malfunction.

DTC Table

DTC

System malfunction location

Page

M-MDS

B1317
Power supply system
B1318
Power supply system
B1342
ABS HU/CM system
B1484
Brake switch system
B2477
ABS HU/CM configuration
C1095
Pump motor, motor relay system
C1096
Pump motor, motor relay system
C1141
LF ABS sensor rotor system
C1142
RF ABS sensor rotor system
C1143
LR ABS sensor rotor system
C1144
RR ABS sensor rotor system
C1145
RF ABS wheel-speed sensor system
C1148
RF ABS wheel-speed sensor system
C1155
LF ABS wheel-speed sensor system
C1158
LF ABS wheel-speed sensor system
C1165
RR ABS wheel-speed sensor system
C1168
RR ABS wheel-speed sensor system
C1175
LR ABS wheel-speed sensor system
C1178
LR ABS wheel-speed sensor system
C1186
Fail-safe relay system
C1194
LF outlet solenoid valve system
C1198
LF inlet solenoid valve system
C1210
RF outlet solenoid valve system
C1214
RF inlet solenoid valve system
C1233
LF ABS wheel-speed sensor/ABS sensor rotor system
C1234
RF ABS wheel-speed sensor/ABS sensor rotor system
C1235
RR ABS wheel-speed sensor/ABS sensor rotor system
C1236
LR ABS wheel-speed sensor/ABS sensor rotor system
C1242
LR outlet solenoid valve system
C1246
RR outlet solenoid valve system
C1250
LR inlet solenoid valve system
C1254
RR inlet solenoid valve system
C1266
Fail-safe relay system
C1805
Incorrect ABS HU/CM installed
U0073
CAN system communication error
U1900
Communication error to other module
U2023
Abnormal message from PCM

PID/DATA Monitor Table

PID name

(definition)

Unit/Condition

Operation condition (reference)

Action

ABS HU/CM terminal

ABS_VOLT
(System battery voltage value)
V
• Ignition switch at ON: Approx. 12.2 V
• Idling: Approx. 14.1 V
Inspect the power supply circuit.
J
ABSLF_I
(Left front inlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSLF_O
(Left front outlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSLR_I
(Left rear inlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSLR_O
(Left rear outlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSPMPRLY
(Motor relay output state)
On/Off
• Relay activated: On
• Relay not activated: Off
Inspect the ABS HU/CM.
-
ABSRF_I
(Right front inlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSRF_O
(Right front outlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSRR_I
(Right rear inlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSRR_O
(Right rear outlet solenoid valve output state)
On/Off
• Solenoid valve activated: On
• Solenoid valve not activated: Off
Inspect the ABS HU/CM.
-
ABSVLVRLY
(Fail-safe relay output state)
On/Off
• Fail-safe relay is
activated: On
• Fail-safe relay is deactivated: Off
Inspect ABS HU/CM.
-
BOO_ABS
(Brake pedal switch input)
On/Off
• Brake pedal depressed: On
• Brake pedal released: Off
Inspect the brake switch.
N
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.
E, F
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.
G, H
PMP_MOTOR
(Pump motor output state)
On/Off
• Pump motor activated: On
• Pump motor not activated: Off
Inspect the ABS HU/CM.
-
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.
M, 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.
I, L

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