Airbag System (to 12/2010)

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1650/32: Occupant Classification System Malfunction
B1650/32 - Occupant Classification System Malfunction

DESCRIPTION

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

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

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





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (OCCUPANT CLASSIFICATION ECU)

(a) Turn the ignition switch on (IG), and wait for at least 10 seconds.

(b) Using the Techstream, check the DTCs of the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC is not output.

NG -- GO TO OCCUPANT CLASSIFICATION SYSTEM
OK -- Continue to next step.

2. CHECK DTC (CENTER AIRBAG SENSOR ASSEMBLY)

(a) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(b) Clear the DTCs stored in memory DTC Check / Clear (to 12/2010).

(c) Turn the ignition switch off.

(d) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(e) Check the DTCs DTC Check / Clear (to 12/2010).

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 -- CHECK CONNECTION OF CONNECTORS

OK -- USE SIMULATION METHOD TO CHECK

3. 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 assembly and the occupant classification ECU.

OK:

The connectors are connected.

NG -- CONNECT CONNECTORS, THEN GO TO STEP 1
OK -- Continue to next step.

4. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (OPEN)

(a) Disconnect the connectors from center airbag sensor assembly and the occupant classification ECU.





(b) Using a service wire, connect L1-12 (FSP+) and L1-13 (FSP-) of connector "B".

NOTICE:
Do not forcibly insert a service wire into the terminal of the connector when connecting.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- CHECK FRONT SEAT WIRE RH (OPEN)
OK -- Continue to next step.

5. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT)

(a) Disconnect the service wire from connector "B".





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- CHECK FRONT SEAT WIRE RH (SHORT)
OK -- Continue to next step.

6. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (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 (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- CHECK FRONT SEAT WIRE RH (SHORT TO B+)
OK -- Continue to next step.

7. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (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 according to the value(s) in the table below.

Standard resistance:





HINT
After replace the center airbag sensor assembly, check for DTCs of the center airbag sensor assembly. If the DTC B1650/32 is detected, replace the occupant classification ECU Removal (to 12/2010) and perform a "Zero point calibration" and "Sensitivity check" of the occupant classification system Programming and Relearning.

NG -- CHECK FRONT SEAT WIRE RH (SHORT TO GROUND)

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY

8. CHECK FRONT SEAT WIRE RH (OPEN)

(a) Disconnect the service wire from connector "B".





(b) Disconnect the front seat wire RH connector from the floor wire No. 2.

(c) Using a service wire, connect LO2-1 (FSP+) and LO2-4 (FSP-) of connector "D".

NOTICE:
Do not forcibly insert a service wire into the terminals of connector when connecting.

(d) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE FRONT SEAT WIRE RH

OK -- REPAIR OR REPLACE FLOOR WIRE NO. 2

9. CHECK FRONT SEAT WIRE RH (SHORT)

(a) Disconnect the front seat wire RH connector from the floor wire No. 2.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE FRONT SEAT WIRE RH

OK -- REPAIR OR REPLACE FLOOR WIRE NO. 2

10. CHECK FRONT SEAT WIRE RH (SHORT TO B+)

(a) Turn the ignition switch off.





(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Disconnect the front seat wire RH connector from the floor wire No. 2.

(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(e) Turn the ignition switch on (IG).

(f) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPAIR OR REPLACE FRONT SEAT WIRE RH

OK -- REPAIR OR REPLACE FLOOR WIRE NO. 2

11. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND)

(a) Disconnect the front seat wire RH connector from the floor wire No. 2.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE FRONT SEAT WIRE RH

OK -- REPAIR OR REPLACE FLOOR WIRE NO. 2