B1650

DTC B1650 OCCUPANT CLASSIFICATION SYSTEM MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Conditions:

The occupant classification system circuit consists of the airbag sensor assembly center and the occupant classification system.

When the airbag sensor assembly center receives signals from the occupant classification ECU, it determines whether or not the front passenger airbag assembly, front seat airbag assembly RH and seat belt pretensioner RH should be operated.

DTC B1650/32 is set when a malfunction is detected in the occupant classification system circuit.

Wiring Diagram:

Step 1 - 2:

Step 3 - 5:

Step 6 - 7:

Step 8 - 9:

Step 9 (contd.) - 13:

Step 14 - 15:

Step 16:

INSPECTION PROCEDURE

CAUTION: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the airbag sensor assembly center connector is necessary.

a. Turn the ignition switch to the LOCK position.
b. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
c. Disconnect the connectors from the airbag sensor assembly center.
d. Disconnect the connectors from the horn button assembly.
e. Disconnect the connector from the front passenger airbag assembly.

HINT: Skip steps (f) to (i) if side and curtain shield airbags are not fitted.

f. Disconnect the connector from the front seat airbag assembly LH.
g. Disconnect the connector from the front seat airbag assembly RH.
h. Disconnect the connector from the curtain shield airbag assembly LH.
i. Disconnect the connector from the curtain shield airbag assembly RH.
j. Disconnect the connector from the front seat outer belt assembly LH.
k. Disconnect the connector from the front seat outer belt assembly RH.