Srs Connectors

HINT:

SRS connectors are located as shown in the following illustration.

2000 Hilux Diagnostic Connector Toyota
H12007

No.

item

Application

0)

Terminal Twin-Lock Mechanism

Connectors 1,2, 3, 4. 5. 6, 7. 8, 9, 10, 11, 12, 13, 14, 15, 16, 17. 18, 19, 20

m

Airbag Activation Prevention Mechanism

Conrmciors 1, 2, 3, 4, 5,6, 8, 19

0)

Electrical Connection Check Mechanism

Connectors ?, 2, 3

(a) All connectors in the SRS are colored in yellow to distinguish them from other connectors. Connectors having special functions and specifically designed for the SRS are used in the locations shown on the previous page to ensure high reliability. These connectors use durable gold-plated terminals.

(1) Terminal Twin-Lock Mechanism

Each connector has a two-piece component consisting of a housing and a spacer. This design enables the terminal to be locked securely by two locking devices (the retainer and the lance) to prevent terminals from coming out.

(2) Airbag Activation Prevention Mechanism

Each connector contains a short spring plate. When the connector is disconnected, the short spring plate automatically connects positive (+) terminal and negative {-) terminal of the squib.

►When Connector is Connected

When Connector is Disconnected

Housing

►When Connector is Connected

Housing

Short Spring Plate

Housing

Short Spring Plate

Housing

Terminal

Terminal

Squib

Connectors Short Spring Plate

Squib

Connectors Short Spring Plate

When Connector is Disconnected

Hilux Squib Connector
Short Spring Plate Contacting Male Terminal
Short Spring Plate ON

rh

£

>

1 1 i

Closed Circuit

HINT:

The type of connector is shown in the diagram on the previous page.

Warning

Light

Warning

Light

Disconnection 'Defection Pin

Airbag Sensor Assembly

(3) Electrical Connection Check Mechanism

This mechanism electrically checks that connectors are connected correctly and completely. The electrical connection check mechanism is designed so that the disconnection detection pin connects with the diagnosis terminals when the connector housing lock is locked.

►Half Connection

»Complete Connection

Terminal for Diagnosis

»Complete Connection

Terminal for Diagnosis

Toyota Yaris Srs Pin Data
Disconnection Detection Pin

HINT:

The illustration shows connectors "1", "2" and "3" in step 11.

Power Source

Sating Sensor

Squibs

Fig.2

Deceleration Sensor

Z14034

(b) When the vehicle is involved in a frontal collision in the hatched area (Fig. 1) and the shock is larger than the predetermined level, the SRS is activated automatically. A sating sensor is designed to go on at a smaller deceleration rate than the airbag sensor. As illustrated in Fig. 2, ignition is caused when current flows to the squib, which happens when a safing sensor and the deceleration sensor go on simultaneously. When a deceleration force acts on the sensors, 2 squibs in the driver airbag and front passenger airbag ignite and generate gas. The gas discharging info the driver airbag and front passenger airbag rapidly increases the pressure inside the bags, breaking open the steering wheel pad and instrument panel. Bag inflation then ends, and the bags deflate as the gas is discharged through discharge holes at the bag's rear or side.

Z14034

x^v ^ Outer

HÛ1581

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