Nissan Tiida C11. Manual - part 1207

SRC-56

< COMPONENT DIAGNOSIS >

SEAT BELT WARNING LAMP CONTROL UNIT

3.

Check voltage between seat belt warning lamp control unit har-
ness connector B51 terminals 21, 22 and ground.

Are inspection results normal?

YES 

>> GO TO 2.

NO

>> Replace seat belt warning lamp control unit.

2.

CHECK HARNESS BETWEEN SEAT BELT WARNING LAMP CONTROL UNIT AND SEAT BELT BUCKLE

SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect the seat belt warning lamp control unit harness connector and the seat belt buckle switch har-
ness connector.

3.

Check continuity between seat belt warning lamp control unit
harness connector B51 (A) terminals 21, 22 and seat belt buckle
switch harness connector B9, B10 (B) terminal 1.

Also check harness for short to ground and short to power.

Are inspection results normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check continuity between seat belt buckle switch harness connector
B9, B10 terminal 2 and ground.

Is inspection result normal?

YES 

>> GO TO 4.

NO

>> Repair open circuit in harness or connectors.

4.

CHECK SEAT BELT BUCKLE SWITCH

Fasten and unfasten the seat belt buckle switch and check continuity
between seat belt buckle switch terminals 1 and 2.

Are inspection results normal?

YES

>> GO TO 5.

NO

>> Replace seat belt buckle switch. Refer to 

SE-14,

"Removal and Installation"

.

5.

CHECK SEAT BELT WARNING LAMP CONTROL UNIT

Check seat belt warning lamp control unit input/output signals. Refer to 

SRC-58, "Reference Value"

.

Are inspection results normal?

YES

>> Inspection End.

Connector

Terminals

Voltage

B51

 21 - Ground

Battery voltage

 22 - Ground

AWHIA0023ZZ

Continuity should exist.

AWHIA0024ZZ

Continuity should exist.

AWHIA0025ZZ

Terminal

Condition

Continuity

1 - 2

Fastened

No

Unfastened

Yes

AWHIA0026ZZ

SEAT BELT WARNING LAMP CONTROL UNIT

SRC-57

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

NO

>> Check seat belt warning lamp control unit pin terminals for damage or loose connections. If any

items are damaged, repair or replace damaged parts.  If not damaged, replace seat belt warning
lamp control unit.

SRC-58

< ECU DIAGNOSIS >

DIAGNOSIS SENSOR UNIT

ECU DIAGNOSIS

DIAGNOSIS SENSOR UNIT

Reference Value

INFOID:0000000001726678

SEAT BELT WARNING LAMP CONTROL UNIT HARNESS TERMINAL LAYOUT

TERMINALS AND REFERENCE VALUES FOR SEAT BELT WARNING LAMP CONTROL UNIT

AWHIA0027ZZ

Terminal

(color)

Item

Condition

Reference value (V)

(Approx.)

Ignition 

switch

Operation

1 (V)

Battery power

—

—

Battery voltage

8 (O)

Driver seat belt warn-
ing lamp output

ON

—

0

15 (BR)

Passenger seat belt 
warning lamp output

ON

—

0

16 (BR)

Ground

—

—

—

17 (O)

Ignition power

ON

—

Battery voltage

21 (O)

Driver seat belt buck-
le switch input

ON

Driver seat belt fastened

12

22 (LG)

Passenger seat belt 
buckle switch input

ON

Passenger seat belt fastened

12

36 (V)

Vehicle speed signal 
(2-pulse)

ON

Speedometer operated

[When vehicle speed is approx. 40 km/h (25 

MPH)] 

NOTE:
Maximum voltage may be 5V due to 
specifications (connected units).

PKIC0642E

DIAGNOSIS SENSOR UNIT

SRC-59

< ECU DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

Wiring Diagram — RHD Models —

INFOID:0000000001396410

ALHWA0008GB