OCCUPANT CLASSIFICATION SENSOR INSPECTION

id081000805100

Warning

• Handling a side air bag improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings/cautions in the Workshop Manual before handling the seat (side air bag integrated). (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.)

• If the sliding mechanisms on both sides are not locked after assembling the seat, the seat will operate accidentally while the vehicle is driven, which could result in serious injury. After assembling the seat, shake it up and down and verify that the sliding mechanism on the both sides are locked.

Note

• If cargo is put on the sensor detection area of the occupancy sensor, the sensor may respond.

1. Switch the ignition off (LOCK).

2. Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

3. Remove the passenger-side seat. (See SEAT REMOVAL/INSTALLATION.)

4. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

5. Switch the ignition ON (engine off or on).

6. Connect the negative (-) lead of the tester to body ground.

7. Verify that the voltages of each of the terminals are as indicated in the Terminal Voltage Table (Reference)

• If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s).

― If not as indicated in the table, replace the seat. (See SEAT REMOVAL/INSTALLATION.)

Terminal Voltage Table (Reference)

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Terminal

Signal

Connected to

Measurement conditions

Voltage (V)

Inspection item(s)

2A

Ground

Body ground

Under any condition

1.0 or less

Body ground

2B

Ignition power relay

SRS1 7.5 A fuse

Ignition switched ON (engine off)

B+

SRS1 7.5 A fuse

Ignition switched OFF (LOCK)

1.0 or less

4A

HS-CAN_L

Occupant classification mat sensor

Terminal used for communication therefore determination based on terminal voltage is not possible.

4B

HS-CAN_H

Occupant classification mat sensor

Terminal used for communication therefore determination based on terminal voltage is not possible.

Terminal	Signal	Connected to	Measurement conditions	Voltage (V)	Inspection item(s)
2A	Ground	Body ground	Under any condition	1.0 or less	Body ground
2B	Ignition power relay	SRS1 7.5 A fuse	Ignition switched ON (engine off)	B+	SRS1 7.5 A fuse
2B	Ignition power relay	SRS1 7.5 A fuse	Ignition switched OFF (LOCK)	1.0 or less	SRS1 7.5 A fuse
4A	HS-CAN_L	Occupant classification mat sensor	Terminal used for communication therefore determination based on terminal voltage is not possible.
4B	HS-CAN_H	Occupant classification mat sensor	Terminal used for communication therefore determination based on terminal voltage is not possible.