ON-BOARD DIAGNOSIS

id040200805500

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.

absggw00000706

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

• When using the IDS (laptop PC)

1. Select “Self Test”.

2. Select “Modules”.

3. 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 HU/CM. (See Clearing DTCs Procedures.)

Clearing DTCs Procedures

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

absggw00000706

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

• When using the IDS (laptop PC)

1. Select “Self Test”.

2. Select “Modules”.

3. 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. Turn the ignition switch to the LOCK position.

6. Turn the ignition switch to the ON position and wait for 5 s or more.

7. Perform DTC inspection. (See Reading DTCs Procedure.)

8. Verify that no DTCs are displayed.

PID/Data Monitor and Record Procedure

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

absggw00000706

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

• When using the IDS (laptop PC)

1. Select “DataLogger”.

2. Select “Modules”.

3. 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 screen function is used for monitoring the calculated value of input/output signals in the module.Therefore, if the monitored value of the output parts is not within the specification, it is necessary to inspect the monitored value of input parts corresponding to the applicable output part control. In addition, because the system does not display an output part malfunction as an abnormality in the monitored value, it is necessary to inspect the output parts individually.

Active Command Modes Procedure

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

absggw00000706

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

• When using the IDS (laptop PC)

1. Select “DataLogger”.

2. Select “Modules”.

3. 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 the operation of output parts cannot be verified after the active command mode inspection is performed, this could indicate the possibility of an open or short circuit, sticking, or operation malfunction in the output parts.

DTC Table

DTC

System malfunction location

Page

B1317

Power supply system

(See DTC B1317, B1318.)

B1318

Power supply system

(See DTC B1317, B1318.)

B1342

ABS HU/CM system

(See DTC B1342.)

B1484

Brake switch system

(See DTC B1484.)

C1095

Pump motor, motor relay system

(See DTC C1095, C1096.)

C1096

Pump motor, motor relay system

(See DTC C1095, C1096.)

C1145

RF ABS wheel-speed sensor system

(See DTC C1145, C1155, C1165, C1175.)

C1155

LF ABS wheel-speed sensor system

(See DTC C1145, C1155, C1165, C1175.)

C1165

RR ABS wheel-speed sensor system

(See DTC C1145, C1155, C1165, C1175.)

C1175

LR ABS wheel-speed sensor system

(See DTC C1145, C1155, C1165, C1175.)

C1186

Fail-safe relay system

(See DTC C1186.)

C1194

LF outlet solenoid valve system

(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)

C1198

LF inlet solenoid valve system

(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)

C1202

Rear outlet solenoid valve system

(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)

C1206

Rear inlet solenoid valve system

(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)

C1210

RF outlet solenoid valve system

(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)

C1214

RF inlet solenoid valve system

(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)

C1222

ABS wheel-speed sensor (slip monitor) system

(See DTC C1222.)

C1233

LF ABS wheel-speed sensor/ABS sensor rotor system

(See DTC C1233, C1234, C1235, C1236.)

C1234

RF ABS wheel-speed sensor/ABS sensor rotor system

(See DTC C1233, C1234, C1235, C1236.)

C1235

RR ABS wheel-speed sensor/ABS sensor rotor system

(See DTC C1233, C1234, C1235, C1236.)

C1236

LR ABS wheel-speed sensor/ABS sensor rotor system

(See DTC C1233, C1234, C1235, C1236.)

C1414

Incorrect ABS HU/CM installed

(See DTC C1414.)

C1730^*

G sensor system

(See DTC C1730, C1949, C1950.)

C1949^*

G sensor system

(See DTC C1730, C1949, C1950.)

C1950^*

G sensor system

(See DTC C1730, C1949, C1950.)

DTC	System malfunction location	Page
B1317	Power supply system	(See DTC B1317, B1318.)
B1318	Power supply system	(See DTC B1317, B1318.)
B1342	ABS HU/CM system	(See DTC B1342.)
B1484	Brake switch system	(See DTC B1484.)
C1095	Pump motor, motor relay system	(See DTC C1095, C1096.)
C1096	Pump motor, motor relay system	(See DTC C1095, C1096.)
C1145	RF ABS wheel-speed sensor system	(See DTC C1145, C1155, C1165, C1175.)
C1155	LF ABS wheel-speed sensor system	(See DTC C1145, C1155, C1165, C1175.)
C1165	RR ABS wheel-speed sensor system	(See DTC C1145, C1155, C1165, C1175.)
C1175	LR ABS wheel-speed sensor system	(See DTC C1145, C1155, C1165, C1175.)
C1186	Fail-safe relay system	(See DTC C1186.)
C1194	LF outlet solenoid valve system	(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)
C1198	LF inlet solenoid valve system	(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)
C1202	Rear outlet solenoid valve system	(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)
C1206	Rear inlet solenoid valve system	(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)
C1210	RF outlet solenoid valve system	(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)
C1214	RF inlet solenoid valve system	(See DTC C1194, C1198, C1202, C1206, C1210, C1214.)
C1222	ABS wheel-speed sensor (slip monitor) system	(See DTC C1222.)
C1233	LF ABS wheel-speed sensor/ABS sensor rotor system	(See DTC C1233, C1234, C1235, C1236.)
C1234	RF ABS wheel-speed sensor/ABS sensor rotor system	(See DTC C1233, C1234, C1235, C1236.)
C1235	RR ABS wheel-speed sensor/ABS sensor rotor system	(See DTC C1233, C1234, C1235, C1236.)
C1236	LR ABS wheel-speed sensor/ABS sensor rotor system	(See DTC C1233, C1234, C1235, C1236.)
C1414	Incorrect ABS HU/CM installed	(See DTC C1414.)
C1730^*	G sensor system	(See DTC C1730, C1949, C1950.)
C1949^*	G sensor system	(See DTC C1730, C1949, C1950.)
C1950^*	G sensor system	(See DTC C1730, C1949, C1950.)

* :4x2 (high clearance model), 4x4

PID/DATA Monitor Table

PID name

(definition)

Unit/Condition

Operation condition (reference)

Action

ABS HU/CM terminal

ABS_LAMP

(ABS warning light driver output state)

On/Off

•  ABS warning light is illuminated: ON

•  ABS warning light is not illuminated: Off

Inspect the ABS warning light.

S

ABS_VOLT

(System battery voltage value)

V

•  Ignition switch or engine switch at ON: Approx. 12.2 V

•  Idling: Approx. 14.1 V

Inspect the power supply circuit.

(See ABS HU/CM SYSTEM INSPECTION.)

J

ACCLMTR^*

(Forward-G sensor input)

G

•  Vehicle is stopped or driving at a constant speed: 0 G

•  Cornering to left: Changes between 0 G and 1.5 G

•  Cornering to right: Changes between 0 G and -1.5 G

Inspect the G sensor.

(See G SENSOR INSPECTION.)

P

BOO_ABS

(Brake pedal switch input)

On/Off

•  Brake pedal depressed: On

•  Brake pedal released: Off

Inspect the brake switch.

(See BRAKE SWITCH INSPECTION.)

N

CCNTABS

(Number of continuous codes)

—

•  DTCs detected:
1—255

•  No DTCs detected: 0

Perform the DTC inspection.

—

PMP_MOTOR

(Pump motor output state)

On/Off

•  Pump motor activated: On

•  Pump motor not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

RLY_PMP

(Pump motor relay output state)

On/Off

•  Relay activated: On

•  Relay not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

RLY_VLV

(Solenoid valve relay output state)

On/Off

•  Solenoid valve relay is
activated: On

•  Solenoid valve relay is deactivated: Off

Inspect ABS HU/CM.

(See ABS HU/CM INSPECTION)

—

V_LF_INL

(Left front inlet solenoid valve output state)

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

V_LF_OTL

(Left front outlet solenoid valve output state)

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

V_RF_INL

(Right front inlet solenoid valve output state)

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

V_RF_OTL

(Right front outlet solenoid valve output state)

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

V_Rear_ INL

(Rear inlet solenoid valve output state)

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

V_Rear_OTL

(Rear outlet solenoid valve output state)

On/Off

•  Solenoid valve activated: On

•  Solenoid valve not activated: Off

Inspect the ABS HU/CM.

(See ABS HU/CM INSPECTION.)

—

WSPD_LF

(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

WSPD_LR

(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.

I, G

WSPD_RF

(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.

O, M

WSPD_RR

(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.

L, K

PID name (definition)	Unit/Condition	Operation condition (reference)	Action	ABS HU/CM terminal
ABS_LAMP (ABS warning light driver output state)	On/Off	• ABS warning light is illuminated: ON • ABS warning light is not illuminated: Off	Inspect the ABS warning light.	S
ABS_VOLT (System battery voltage value)	V	• Ignition switch or engine switch at ON: Approx. 12.2 V • Idling: Approx. 14.1 V	Inspect the power supply circuit. (See ABS HU/CM SYSTEM INSPECTION.)	J
ACCLMTR^* (Forward-G sensor input)	G	• Vehicle is stopped or driving at a constant speed: 0 G • Cornering to left: Changes between 0 G and 1.5 G • Cornering to right: Changes between 0 G and -1.5 G	Inspect the G sensor. (See G SENSOR INSPECTION.)	P
BOO_ABS (Brake pedal switch input)	On/Off	• Brake pedal depressed: On • Brake pedal released: Off	Inspect the brake switch. (See BRAKE SWITCH INSPECTION.)	N
CCNTABS (Number of continuous codes)	—	• DTCs detected: 1—255 • No DTCs detected: 0	Perform the DTC inspection.	—
PMP_MOTOR (Pump motor output state)	On/Off	• Pump motor activated: On • Pump motor not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
RLY_PMP (Pump motor relay output state)	On/Off	• Relay activated: On • Relay not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
RLY_VLV (Solenoid valve relay output state)	On/Off	• Solenoid valve relay is activated: On • Solenoid valve relay is deactivated: Off	Inspect ABS HU/CM. (See ABS HU/CM INSPECTION)	—
V_LF_INL (Left front inlet solenoid valve output state)	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
V_LF_OTL (Left front outlet solenoid valve output state)	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
V_RF_INL (Right front inlet solenoid valve output state)	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
V_RF_OTL (Right front outlet solenoid valve output state)	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
V_Rear_ INL (Rear inlet solenoid valve output state)	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
V_Rear_OTL (Rear outlet solenoid valve output state)	On/Off	• Solenoid valve activated: On • Solenoid valve not activated: Off	Inspect the ABS HU/CM. (See ABS HU/CM INSPECTION.)	—
WSPD_LF (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
WSPD_LR (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.	I, G
WSPD_RF (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.	O, M
WSPD_RR (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.	L, K

* :4x2 (high clearance model), 4x4

Active Command Modes Table

Command name

Output part

Operation

Operating condition

PMP_MOTOR

Pump motor

On/Off

Ignition switch or engine switch at ON

V_LF_INL

LF inlet solenoid valve

V_LF_OTL

LF outlet solenoid valve

V_Rear_INL

Rear inlet solenoid valve

V_Rear_OTL

Rear outlet solenoid valve

V_RF_INL

RF inlet solenoid valve

V_RF_OTL

RF outlet solenoid valve

Command name	Output part	Operation	Operating condition
PMP_MOTOR	Pump motor	On/Off	Ignition switch or engine switch at ON
V_LF_INL	LF inlet solenoid valve
V_LF_OTL	LF outlet solenoid valve
V_Rear_INL	Rear inlet solenoid valve
V_Rear_OTL	Rear outlet solenoid valve
V_RF_INL	RF inlet solenoid valve
V_RF_OTL	RF outlet solenoid valve