ON-BOARD DIAGNOSIS[L3]

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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 DLC‐2 connector.

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

• When using the IDS (notebook 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 ON-BOARD DIAGNOSIS[L3].)

Clearing DTCs Procedures

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

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

• When using the IDS (notebook 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 DLC‐2 connector.

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

• When using the IDS (notebook 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 DLC‐2 connector.

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

• When using the IDS (notebook 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

B1342

ABS HU/CM

(See DTC B1342[L3].)

B1676

Power supply system

(See DTC B1676[L3].)

B2477

ABS HU/CM configuration system

(See DTC B2477[L3].)

B2900

PCM communication

(See DTC B2900, C1805[L3].)

C1095

Pump motor, motor relay

(See DTC C1095[L3].)

C1145

RF ABS wheel-speed sensor

(See DTC C1145, C1155, C1165, C1175[L3].)

C1155

LF ABS wheel-speed sensor

C1165

RR ABS wheel-speed sensor

C1175

LR ABS wheel-speed sensor

C1233

LF ABS sensor rotor

(See DTC C1233, C1234, C1235, C1236[L3].)

C1234

RF ABS sensor rotor

C1235

RR ABS sensor rotor

C1236

LR ABS sensor rotor

C1730

G-sensor

(See DTC C1730, C2769, C2770[L3].)

C1805

PCM communication

(See DTC B2900, C1805[L3].)

C2769

G-sensor

(See DTC C1730, C2769, C2770[L3].)

C2770

G-sensor

(See DTC C1730, C2769, C2770[L3].)

U1900

CAN line

(See DTC U1900, U2023[L3].)

U2023

CAN line

DTC	System Malfunction Location	Page
B1342	ABS HU/CM	(See DTC B1342[L3].)
B1676	Power supply system	(See DTC B1676[L3].)
B2477	ABS HU/CM configuration system	(See DTC B2477[L3].)
B2900	PCM communication	(See DTC B2900, C1805[L3].)
C1095	Pump motor, motor relay	(See DTC C1095[L3].)
C1145	RF ABS wheel-speed sensor	(See DTC C1145, C1155, C1165, C1175[L3].)
C1155	LF ABS wheel-speed sensor
C1165	RR ABS wheel-speed sensor
C1175	LR ABS wheel-speed sensor
C1233	LF ABS sensor rotor	(See DTC C1233, C1234, C1235, C1236[L3].)
C1234	RF ABS sensor rotor
C1235	RR ABS sensor rotor
C1236	LR ABS sensor rotor
C1730	G-sensor	(See DTC C1730, C2769, C2770[L3].)
C1805	PCM communication	(See DTC B2900, C1805[L3].)
C2769	G-sensor	(See DTC C1730, C2769, C2770[L3].)
C2770	G-sensor	(See DTC C1730, C2769, C2770[L3].)
U1900	CAN line	(See DTC U1900, U2023[L3].)
U2023	CAN line

PID/DATA Monitor Table

PID name (definition)

Unit/Operation

Operation Status (Reference)

Action

ABS HU/CM

Terminal

ABSLF_I

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSLF_O

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSLR_I

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSLR_O

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSRF_I

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSRF_O

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSRR_I

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

ABSRR_O

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

•  Inspect the ABS HU/CM.

—

BOO_ABS

On/Off

•  Brake pedal depressed: On

•  Brake pedal released: Off

•  Inspect the brake switch.

—

BRK_FLUID

OK/Low

•  Brake fluid level at LOW level or more: OK

•  Brake fluid level less than LOW level: Low

•  Inspect the brake fluid level.

•  Inspect the brake fluid level sensor.

—

CCNTABS

-

Indicates number of DTC

•  Perform the DTC inspection.

—

LONG_ACCL

G

•  Stopped or low vehicle speed: 0 G

•  Acceleration: Changes to 0 G—positive

•  Deceleration: Changes to 0 G—negative

•  Inspect the ABS HU/CM.

—

LF_WSPD

KPH, MPH

•  Vehicle stopped: 0 KPH, 0 MPH

•  Vehicle driven: Vehicle speed

•  Inspect the ABS wheel-speed sensor.

I, F

LR_WSPD

KPH, MPH

•  Vehicle stopped: 0 KPH, 0 MPH

•  Vehicle driven: Vehicle speed

•  Inspect the ABS wheel-speed sensor.

AJ, AG

RF_WSPD

KPH, MPH

•  Vehicle stopped: 0 KPH, 0 MPH

•  Vehicle driven: Vehicle speed

•  Inspect the ABS wheel-speed sensor.

AP, AS

RR_WSPD

KPH, MPH

•  Vehicle stopped: 0 KPH, 0 MPH

•  Vehicle driven: Vehicle speed

•  Inspect the ABS wheel-speed sensor.

O, R

PID name (definition)	Unit/Operation	Operation Status (Reference)	Action	ABS HU/CM Terminal
ABSLF_I	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSLF_O	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSLR_I	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSLR_O	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSRF_I	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSRF_O	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSRR_I	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
ABSRR_O	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	• Inspect the ABS HU/CM.	—
BOO_ABS	On/Off	• Brake pedal depressed: On • Brake pedal released: Off	• Inspect the brake switch.	—
BRK_FLUID	OK/Low	• Brake fluid level at LOW level or more: OK • Brake fluid level less than LOW level: Low	• Inspect the brake fluid level. • Inspect the brake fluid level sensor.	—
CCNTABS	-	Indicates number of DTC	• Perform the DTC inspection.	—
LONG_ACCL	G	• Stopped or low vehicle speed: 0 G • Acceleration: Changes to 0 G—positive • Deceleration: Changes to 0 G—negative	• Inspect the ABS HU/CM.	—
LF_WSPD	KPH, MPH	• Vehicle stopped: 0 KPH, 0 MPH • Vehicle driven: Vehicle speed	• Inspect the ABS wheel-speed sensor.	I, F
LR_WSPD	KPH, MPH	• Vehicle stopped: 0 KPH, 0 MPH • Vehicle driven: Vehicle speed	• Inspect the ABS wheel-speed sensor.	AJ, AG
RF_WSPD	KPH, MPH	• Vehicle stopped: 0 KPH, 0 MPH • Vehicle driven: Vehicle speed	• Inspect the ABS wheel-speed sensor.	AP, AS
RR_WSPD	KPH, MPH	• Vehicle stopped: 0 KPH, 0 MPH • Vehicle driven: Vehicle speed	• Inspect the ABS wheel-speed sensor.	O, R

Active Command Modes Table

Command name

Output device

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

DTC	System Malfunction Location	Page
M-MDS	System Malfunction Location	Page
B1342	ABS HU/CM	(See DTC B1342[L3].)
B1676	Power supply system	(See DTC B1676[L3].)
B2477	ABS HU/CM configuration system	(See DTC B2477[L3].)
B2900	PCM communication	(See DTC B2900, C1805[L3].)
C1095	Pump motor, motor relay	(See DTC C1095[L3].)
C1145	RF ABS wheel-speed sensor	(See DTC C1145, C1155, C1165, C1175[L3].)
C1155	LF ABS wheel-speed sensor
C1165	RR ABS wheel-speed sensor
C1175	LR ABS wheel-speed sensor
C1233	LF ABS sensor rotor	(See DTC C1233, C1234, C1235, C1236[L3].)
C1234	RF ABS sensor rotor
C1235	RR ABS sensor rotor
C1236	LR ABS sensor rotor
C1730	G-sensor	(See DTC C1730, C2769, C2770[L3].)
C1805	PCM communication	(See DTC B2900, C1805[L3].)
C2769	G-sensor	(See DTC C1730, C2769, C2770[L3].)
C2770	G-sensor	(See DTC C1730, C2769, C2770[L3].)
U1900	CAN line	(See DTC U1900, U2023[L3].)
U2023	CAN line	(See DTC U1900, U2023[L3].)

Command name	Output device	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