Nissan Qashqai J11. Manual - part 969

C1198 VACUUM SENSOR

BRC-113

< DTC/CIRCUIT DIAGNOSIS >

[WITH ESP]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1198 VACUUM SENSOR

DTC Logic

INFOID:0000000010329852

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 C1198 detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-113, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010329853

Regarding Wiring Diagram information, refer to 

BRC-55, "Wiring Diagram"

.

1.

CHECK VACUUM SENSOR CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect vacuum sensor harness connector.

3.

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

4.

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

5.

Check continuity between vacuum sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning components.

2.

CHECK TERMINAL

DTC

Display Item

Malfunction detected condition

Possible causes

C1198

VACUUM SEN CIR

• When an open circuit is detected in vacuum sensor 

circuit.

• When a short circuit is detected in vacuum sensor 

circuit.

• When a malfunction is detected in vacuum sensor 

noise.

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

(control unit)

Vacuum sensor

ABS actuator and electric unit (control unit)

Continuity

Connector

Terminal

Connector

Terminal

E51

1

E18

12

Yes

2

24

3

5

Vacuum sensor

—

Continuity

Connector

Terminal

E51

1

Ground

No

2

3

BRC-114

< DTC/CIRCUIT DIAGNOSIS >

[WITH ESP]

C1198 VACUUM SENSOR

• 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 3.

NO

>> Repair or replace malfunctioning components.

3.

REPLACE VACUUM SENSOR

With CONSULT

1.

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

2.

Replace vacuum sensor.

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 “C1198” detected?

YES

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

BRC-142, "Removal and Installa-

tion"

.

NO

>> Inspection End.

C1199 BRAKE BOOSTER

BRC-115

< DTC/CIRCUIT DIAGNOSIS >

[WITH ESP]

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BRC

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C1199 BRAKE BOOSTER

DTC Logic

INFOID:0000000010329854

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 C1199 detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-115, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010329855

Regarding Wiring Diagram information, refer to 

BRC-55, "Wiring Diagram"

.

1.

CHECK BRAKE BOOSTER

1.

Turn the ignition switch OFF.

2.

Check brake booster. Refer to 

BR-14, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace brake booster. Refer to 

BR-29, "Exploded View"

.

2.

CHECK VACUUM PIPING

Check vacuum piping. Refer to 

BR-32, "Exploded View"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace vacuum piping. Refer to 

BR-33, "Removal and Installation"

.

3.

CHECK VACUUM SENSOR CIRCUIT

1.

Disconnect vacuum sensor harness connector.

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.

4.

Check continuity between vacuum sensor harness connector and ground.

DTC

Display Item

Malfunction detected condition

Possible causes

C1199

BRAKE BOOSTER

When brake booster vacuum is approx. 0 kPa (0 mm-
Hg) during engine running.

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

(control unit)

Vacuum sensor

ABS actuator and electric unit (control unit)

Continuity

Connector

Terminal

Connector

Terminal

E51

1

E18

12

Yes

2

24

3

5

BRC-116

< DTC/CIRCUIT DIAGNOSIS >

[WITH ESP]

C1199 BRAKE BOOSTER

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.

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-142, "Removal and Installa-

tion"

.

NO

>> Inspection End.

Vacuum sensor

—

Continuity

Connector

Terminal

E51

1

Ground

No

2

3