B1650
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1650/32: Occupant Classification System Malfunction
DTC 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 assembly and the front seat side airbag assembly 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 to the ON position, and wait for at least 10 seconds.
(b) Using the intelligent tester, check the DTCs of the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC is not output.
NG -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
OK -- Continue to next step.
2. CHECK DTC (CENTER AIRBAG SENSOR ASSEMBLY)
(a) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory DTC Check / Clear.
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(e) Check the DTCs DTC Check / Clear.
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.
OK -- USE SIMULATION METHOD TO CHECK
NG -- Continue to next step.
3. CHECK CONNECTORS
(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) Check that the connectors are properly connected to the center airbag sensor assembly and occupant classification ECU.
OK:
The connectors are properly connected.
HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.
(d) Disconnect the connectors from the center airbag sensor assembly and occupant classification ECU.
(e) Check that the connectors are not damaged.
OK:
The connectors are connected.
NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.
4. CHECK FLOOR WIRE NO. 2 (OPEN)
(a) Disconnect the connectors from the steering pad.
(b) Disconnect the connectors from the front passenger airbag assembly.
(c) Disconnect the connector from the driver side knee airbag assembly.
(d) with Side and Curtain Shield Airbag:
Disconnect the connector from the front seat side airbag assembly LH.
(e) with Side and Curtain Shield Airbag:
Disconnect the connector from the front seat side airbag assembly RH.
(f) with Side and Curtain Shield Airbag:
Disconnect the connector from the curtain shield airbag assembly LH.
(g) with Side and Curtain Shield Airbag:
Disconnect the connector from the curtain shield airbag assembly RH.
(h) Disconnect the connector from the front seat outer belt assembly LH.
(i) Disconnect the connector from the front seat outer belt assembly RH.
(j) Using a service wire, connect terminals O4-8 (FSR+) and O4-4 (FSR-) of connector "C".
NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting.
(k) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.
5. CHECK FLOOR WIRE NO. 2 (SHORT)
(a) Disconnect the service wire from connector "C".
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.
6. CHECK FLOOR WIRE NO. 2 (SHORT TO B+)
(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.
7. CHECK FLOOR WIRE NO. 2 (SHORT TO GROUND)
(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) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.
8. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Connect the connectors to the center airbag sensor assembly and occupant classification ECU.
(b) Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
(c) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(d) Clear the DTCs stored in the memory DTC Check / Clear.
(e) Turn the ignition switch to the LOCK position.
(f) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(g) Check for DTCs DTC Check / Clear.
OK:
DTC B1650/32 is not output.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- Continue to next step.
9. REPLACE OCCUPANT CLASSIFICATION ECU
(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) Replace the occupant classification ECU Removal.
NEXT -- Continue to next step.
10. PERFORM ZERO POINT CALIBRATION
(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Connect the intelligent tester to the DLC3.
(c) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(d) Using the intelligent tester, perform "zero point calibration" Programming and Relearning.
OK:
"COMPLETED" is displayed.
NEXT -- Continue to next step.
11. PERFORM SENSITIVITY CHECK
(a) Using the intelligent tester, perform "sensitivity check" Programming and Relearning.
NEXT -- END