Component Tests and General Diagnostics

INSPECT SEAT BELT WARNING LIGHT
a. Remove the integration relay from the instrument panel junction block.
b. Ground terminal 2 on the integration relay with the connectors still connected.
c. Turn the ignition switch ON and check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire harness.




INSPECT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between terminals 1 and 2 on the switch side connector with the switch ON (belt fastened).
b. Check that no continuity exists between terminals 1 and 2 on the switch side connector with the switch OFF (belt unfastened).
If operation is not as specified, replace the front seat inner belt.

INSPECT BUCKLE SWITCH CIRCUIT







Disconnect the connector from the switch and inspect the connector on wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.

INSPECT INTEGRATION RELAY SEAT BELT WARNING SYSTEM OPERATION




a. Connect the positive (+) lead from the battery to terminals 1 and 7.
b. Connect the terminal 7 to terminal 9 through the 3.4 W test bulb.
c. Connect the negative (-) lead from the battery to terminal 10.
d. Check that the bulb lights and the buzzer sounds for 4 to 8 seconds.
e. Return to step (a) and operate the chime again.




f. Connect the negative (-) lead from the battery to terminal 8.
g. Check that the buzzer stops sounding.

HINT: Check the buzzer within a period of 4 to 8 seconds.

If operation is not as specified, replace the relay.

Seat belt warning:
INSPECT INTEGRATION RELAY CIRCUIT







Remove the relay from the junction block No.1 and inspect the connectors on the junction block side.
If the circuit is as specified, try to replace the relay with a new one.
If the circuit is not as specified, inspect the circuits connected to other parts.