Nissan Pathfinder. Manual — part 260

C1199 BRAKE BOOSTER

BRC-99

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning components.

4.

CHECK TERMINAL

• Check vacuum sensor pin terminals for damage or loose connection with harness connector.

• Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-

ness connector.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning components.

5.

REPLACE VACUUM SENSOR

With CONSULT

1. Connect ABS actuator and electric unit (control unit) harness connector.

2. Replace vacuum sensor. Refer to

BR-31, "Removal and Installation"

.

CAUTION:

Always replace brake booster because vacuum sensor cannot be disassembled.

3. Erase self-diagnosis result for “ABS”.

4. Turn the ignition switch OFF.

5. Start engine.

6. Perform self-diagnosis for “ABS”.
Is DTC “C1199” detected?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to

BRC-123, "Removal and Installa-

tion"

.

NO

>> Inspection End.

Vacuum sensor

—

Continuity

Connector

Terminal

E167

1

Ground

No

2

3

BRC-100

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C119A VACUUM SENSOR

C119A VACUUM SENSOR

DTC Logic

INFOID:0000000009177314

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULT

With

CONSULT.

1. Turn the ignition switch ON.

2. Perform self-diagnostic result.
Is DTC C119A detected?

YES

>> Proceed to diagnosis procedure. Refer to

BRC-100, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009177315

Regarding Wiring Diagram information, refer to

BRC-44, "Wiring Diagram"

.

1.

CHECK VACUUM SENSOR POWER SUPPLY

1. Turn the ignition switch OFF.

2. Disconnect vacuum sensor harness connector.

3. Check voltage between vacuum sensor harness connector and ground.

4. Turn the ignition switch ON.

CAUTION:

Never start engine.

5. Check voltage between vacuum sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK VACUUM SENSOR POWER SUPPLY CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect ABS actuator and electric unit (control unit) harness connector.

3. Check continuity between vacuum sensor harness connector and ABS actuator and electric unit (control

unit) harness connector.

DTC

Display Item

Malfunction detected condition

Possible causes

C119A

VACUUM SEN VOLT

When a malfunction is detected in supply power volt-
age of vacuum sensor.

• Harness or connector
• Vacuum sensor (brake booster)
• ABS actuator and electric unit

(control unit)

Vacuum sensor

—

Voltage

(Approx.)

Connector

Terminal

E167

3

Ground

0 V

Vacuum sensor

—

Voltage

(Approx.)

Connector

Terminal

E167

3

Ground

4.75 V – 5.25 V

C119A VACUUM SENSOR

BRC-101

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

4. Check continuity between vacuum sensor harness connector and ground.

Is the inspection result normal?

YES

>> Perform diagnosis of ABS actuator and electric unit (control unit) power supply and ground circuit.

Refer to

BRC-65, "Diagnosis Procedure"

.

NO

>> Repair or replace malfunctioning components.

3.

CHECK VACUUM SENSOR GROUND CIRCUIT

1. Turn the ignition switch OFF.

2. Check continuity between vacuum sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning components.

4.

CHECK TERMINAL

• Check vacuum sensor pin terminals for damage or loose connection with harness connector.

• Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-

ness connector.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to

BRC-123, "Removal and Installa-

tion"

.

NO

>> Repair or replace malfunctioning components.

Vacuum sensor

ABS actuator and electric unit (control unit)

Continuity

Connector

Terminal

Connector

Terminal

E167

3

E125

28

Yes

Vacuum sensor

—

Continuity

Connector

Terminal

E167

3

Ground

No

Vacuum sensor

—

Continuity

Connector

Terminal

E167

2

Ground

Yes

BRC-102

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

U1000 CAN COMM CIRCUIT

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009177316

CAN communication allows a high rate of information transmission through the two communication lines

(CAN-H line and CAN-L line) connecting various control units in the system. Each control unit transmits/

receives data but selectively reads required data only.

DTC Logic

INFOID:0000000009177317

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009177318

1.

CHECK SELF-DIAGNOSTIC RESULT

With CONSULT.

1. Turn ignition switch ON.

2. Perform self-diagnostic result.
Is DTC U1000 detected?

YES

>> Proceed to diagnosis procedure. Refer to

LAN-20, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to

GI-49, "Intermittent Incident"

.

DTC

Display Item

Malfunction detected condition

Possible causes

U1000

CAN COMM CIRCUIT

When CAN communication signal is not continuously
received for 2 seconds or more

CAN communication system mal-
function