Toyota Sequoia (2005). Manual - part 422

H23040

E2

E1

A20

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1483

1677

3

Check wire harness (airbag sensor assembly – body 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

A20–25 (E1) – 

Body ground

Always

Below 1 

Ω

A20–26 (E2) – 

Body ground

Always

Below 1 

Ω

NG

Repair or replace wire harness.

OK

DI–1484

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1678

4

Check SRS warning light.

PREPARATION:
(a)

Connect the connectors to the airbag sensor assembly.

(b)

Connect the connectors to the steering wheel pad.

(c)

Connect the connectors to the front passenger airbag assembly.

(d)

w/ Side and curtain shield airbag:
Connect the connectors to the side airbag assembly LH and RH.

(e)

w/ Side and curtain shield airbag:
Connect the connectors to the curtain shield airbag assembly LH and RH.

(f)

Connect the connectors to the front seat outer belt LH and RH.

(g)

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, and wait for at least 6 seconds.

(b)

Operate all components of the electrical system (defogger, wiper, headlight, heater blower, etc.) and
check the SRS warning light operation.

OK:

The SRS warning light does not come on.

NG

Replace airbag sensor assembly
(see page 

RS–82

).

OK

END

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1485

1679

Trouble in Indicator of Passenger Airbag ON/OFF Indicator

CIRCUIT DESCRIPTION

The occupant classification system detects the front passenger seat condition. It then informs a passenger
of the front passenger airbag assembly condition (activated/not activated) by the passenger airbag ON/OFF
indicator.
The table below shows the normal indication condition of the passenger airbag ON/OFF indicator and the
front passenger seat condition.

Front passenger seat condition

ON Indicator

OFF Indicator

Adult is seated.

ON

OFF

Child is seated.

OFF

ON

Vacant

OFF

OFF

Occupant classification system

 

failure

OFF

ON

INSPECTION PROCEDURE

1

Check SRS warning light.

CHECK:
Turn the ignition switch to the ON position, and check the SRS warning light condition.
HINT:
If this trouble occurs, the SRS warning light is off. If it is on, a DTC is output. Troubleshoot for the output DTC.
OK:

The SRS warning light does not come on.

NG

Check DTC (see page 

DI–1147

).

OK

DIDHT–01

DI–1486

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1680

2

Check passenger airbag ON/OFF indicator condition.

PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check if the passenger airbag ON/OFF indicator correctly indicates the front passenger seat condition.
OK:

Front passenger seat condition

ON Indicator

OFF Indicator

Adult is seated.

ON

OFF

Child is seated.

OFF

ON

Vacant

OFF

OFF

Occupant classification system

 

failure

OFF

ON

NG

Go to step 3.

OK

END