Occupant Detection Sensor Circuit Malfunction

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1650/32: Occupant Detection Sensor Circuit Malfunction

DTC B1650/32 - Occupant Detection Sensor Circuit Malfunction

DESCRIPTION

The occupant detection sensor circuit consists of the center airbag sensor and the occupant detection sensor.
If the center airbag sensor receives signals from the occupant detection sensor, it detects whether or not the front passenger airbag and the front passenger side-side airbag should be activated.
DTC B1650/32 is recorded when a malfunction is detected in the occupant detection sensor circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC




(a) Turn the ignition switch ON, and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.
(c) Turn the ignition switch OFF.
(d) Turn the ignition switch ON, and wait for at least 60 seconds.
(e) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
B1650/32 is not output.
HINT: Codes other than DTC B1650/32 may be output at this time, but they are not related to this check.

OK -- USE SIMULATION METHOD TO CHECK
NG -- Continue to next step.
2. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor and the occupant detection sensor.
OK:
The connectors are connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK NO. 2 FLOOR WIRE (OPEN)




(a) Disconnect the connectors from the center airbag sensor and the occupant detection sensor.
(b) Using a service wire, connect terminals A22-16 (FSR+) and A22-24 (FSR-) of connector "B".
NOTE:
Do not forcibly insert a service wire into the terminals of connector when connecting.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
4. CHECK NO. 2 FLOOR WIRE (SHORT)




(a) Disconnect the service wire from connector "B".
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
5. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)




(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
6. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)




(a) Turn the ignition switch OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
7. CHECK CENTER AIRBAG SENSOR ASSEMBLY




(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch ON, and wait for at least 60 seconds.
(c) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.
(d) Turn the ignition switch OFF.
(e) Turn the ignition switch ON, and wait for at least 60 seconds.
(f) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1650/32 is not output.
HINT: Codes other than DTC B1650/32 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK