Toyota Sequoia (2005). Manual - part 353

C84207

G27650

H43694

H24002

Occupant 
Classification ECU

Airbag
Sensor
Assembly

D

FSR–

FSR+

C

B

A

FSR+

FSR–

O6

E

F

A21

Service Wire

C84205

G27650

H24003

Occupant 
Classification ECU

Airbag
Sensor
Assembly

D

A21

FSR–

FSR+

C

B

A

E

F

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1207

1401

5

Check occupant classification system circuit (open).

PREPARATION:
(a)

Disconnect the connector from the occupant classifica-
tion ECU.

(b)

Using a service wire, connect O6–8 (FSR+) and O6–4
(FSR–) of connector ”E”.

NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

A21–16 (FSR+) – 

A21–24 (FSR–)

Always

Below 1 

Ω

NG

Go to step 9.

OK

6

Check occupant classification system circuit (short).

PREPARATION:
Disconnect the service wire from connector ”E”.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

A21–16 (FSR+) – 

A21–24 (FSR–)

Always

1 M

Ω

 or higher

NG

Go to step 10.

OK

C84205

G27650

H24003

Occupant 
Classification ECU

Airbag
Sensor
Assembly

D

A21

FSR–

FSR+

C

B

A

E

F

DI–1208

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1402

7

Check occupant classification system circuit (short to B+).

PREPARATION:
Connect the negative (–) terminal cable to the battery, and wait
for at least 2 seconds.
CHECK:
(a)

Turn the ignition switch to the ON position.

(b)

Measure the resistance according to the value(s) in the
table below.

OK:

Tester Connection

Condition

Specified Condition

A21–16 (FSR+) – 

Body ground

Ignition switch ON

Below 1 V

A21–24 (FSR–) – 

Body ground

Ignition switch ON

Below 1 V

NG

Go to step 11.

OK

C84205

G27650

H24003

Occupant 
Classification ECU

Airbag
Sensor
Assembly

D

A21

FSR–

FSR+

C

B

A

E

F

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1209

1403

8

Check occupant classification system circuit (short to ground).

PREPARATION:
(a)

Turn the ignition switch to the LOCK position.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait for at least 90 seconds.

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

A21–16 (FSR+) – 

Body ground

Always

1 M

Ω

 or higher

A21–24 (FSR–) – 

Body ground

Always

1 M

Ω

 or higher

NG

Go to step 12.

OK

Replace airbag sensor assembly (see page 

RS–82

).

HINT:
Check for DTCs of the airbag sensor assembly. If the DTC B1650/32 is detected, replace the occupant clas-
sification ECU (see page 

RS–111

) and perform a ”Zero point calibration” and ”Sensitivity check” of the occu-

pant classification system (see page 

DI–1128

).

C84213

H43694 H24024

H24004

Occupant
Classification
ECU

Airbag
Sensor
Assembly

A

O6

FSR+

FSR–

B

C

D

E

F

Service Wire

BL1

Seat Wire No. 1

Floor Wire

FSR+

FSR–

C84211

H24024

H24005

Occupant
Classification
ECU

Airbag
Sensor
Assembly

A

FSR+

FSR–

B

C

D

E

F

BL1

Seat Wire No. 1

Floor Wire

DI–1210

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1404

9

Check seat wire No. 1 (open).

PREPARATION:
Disconnect the seat wire No. 1 connector from the floor wire.
HINT:
The service wire has already been inserted into connector ”E”.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

BL1–3 (FSR+) – 

BL1–5 (FSR–)

Always

Below 1 

Ω

NG

Repair or replace seat wire No. 1.

OK

Repair or replace floor wire.

10

Check seat wire No. 1 (short).

PREPARATION:
Disconnect the seat wire No. 1 connector from the floor wire.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

BL1–3 (FSR+) – 

BL1–5 (FSR–)

Always

1 M

Ω

 or higher

NG

Repair or replace seat wire No. 1.

OK

Repair or replace floor wire.