Seat Position Airbag Sensor Circuit Malfunction - Airbag System
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1653/35: Seat Position Airbag Sensor Circuit Malfunction
DTC B1653/35 - Seat Position Airbag Sensor Circuit Malfunction
DESCRIPTION
The seat position airbag sensor circuit consists of the center airbag sensor assembly and the seat position airbag sensor.
DTC B1653/35 is recorded when a malfunction is detected in the seat position airbag sensor circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK DTC
(a) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(b) Clear the DTCs stored in the 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 for DTCs DTC Check / Clear.
OK:
DTC B1653/35 is not output.
HINT: Codes other than DTC B1653/35 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
2. CHECK CONNECTION OF 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 the seat position airbag sensor.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK CONNECTORS
(a) Disconnect the connectors from the center airbag sensor assembly and the seat position airbag sensor.
(b) Check that the connectors are not damaged.
OK:
The connectors are not deformed or damaged.
NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.
4. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (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 1 and 2 of connector "E".
NOTICE: 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 -- CHECK FRONT SEAT INNER BELT ASSEMBLY LH (OPEN)
OK -- Continue to next step.
5. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT)
(a) Disconnect the service wire from connector E.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK FRONT SEAT INNER BELT ASSEMBLY LH (SHORT)
OK -- Continue to next step.
6. CHECK SEAT POSITION AIRBAG SENSOR 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 to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- CHECK FRONT SEAT INNER BELT ASSEMBLY LH (SHORT TO B+)
OK -- Continue to next step.
7. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (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 -- CHECK FRONT SEAT INNER BELT ASSEMBLY LH (SHORT TO GROUND)
OK -- Continue to next step.
8. CHECK SEAT POSITION AIRBAG SENSOR
(a) Connect the connectors to the center airbag sensor assembly and the seat position airbag sensor.
(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 B1653/35 is not output.
HINT: Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.
NG -- REPLACE SEAT POSITION AIRBAG SENSOR
OK -- USE SIMULATION METHOD TO CHECK
9. REPLACE SEAT POSITION AIRBAG SENSOR
(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 seat position airbag sensor Removal.
HINT: Perform inspection using parts from a normal vehicle if possible.
NEXT -- Continue to next step.
10. 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 to the ON position, and wait for at least 60 seconds.
(c) Clear the DTCs stored in the memory DTC Check / Clear.
(d) Turn the ignition switch to the LOCK position.
(e) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(f) Check for DTCs DTC Check / Clear.
OK:
DTC B1653/35 is not output.
HINT: Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- END
11. CHECK FRONT SEAT INNER BELT ASSEMBLY LH (OPEN)
(a) Disconnect the floor wire connector from the front seat inner belt assembly LH.
HINT: The service wire has already been inserted into connector "E".
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE FRONT SEAT INNER BELT ASSEMBLY LH
OK -- REPAIR OR REPLACE FLOOR WIRE
12. CHECK FRONT SEAT INNER BELT ASSEMBLY LH (SHORT)
(a) Disconnect the floor wire connector from the front seat inner belt assembly LH.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE FRONT SEAT INNER BELT ASSEMBLY LH
OK -- REPAIR OR REPLACE FLOOR WIRE
13. CHECK FRONT SEAT INNER BELT ASSEMBLY LH (SHORT TO B+)
(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 floor wire connector from the front seat inner belt assembly LH.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPLACE FRONT SEAT INNER BELT ASSEMBLY LH
OK -- REPAIR OR REPLACE FLOOR WIRE
14. CHECK FRONT SEAT INNER BELT ASSEMBLY LH (SHORT TO GROUND)
(a) Disconnect the floor wire connector from the front seat inner belt assembly LH.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE FRONT SEAT INNER BELT ASSEMBLY LH
OK -- REPAIR OR REPLACE FLOOR WIRE