Front Passenger Side - Side Airbag Sensor Circuit Malfunction - Airbag System

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1625/22: Front Passenger Side - Side Airbag Sensor Circuit Malfunction

DTC B1625/22 - Front Passenger Side - Side Airbag Sensor Circuit Malfunction

DESCRIPTION

The side airbag sensor RH consists of the safing sensor, the diagnostic circuit and the lateral deceleration sensor. The center airbag sensor receives signals from the lateral deceleration sensor and determines whether or not the SRS should be activated.
DTC B1625/22 is recorded when a malfunction is detected in the side airbag sensor RH circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC




(a) Turn the power switch ON (IG), and wait for at least 60 seconds.
(b) Clear the DTCs DTC Check / Clear.
(c) Turn the power switch OFF.
(d) Turn the power switch ON (IG), and wait for at least 60 seconds.
(e) Check for DTCs DTC Check / Clear.
OK:
DTC B1622/25 is not output.
HINT: DTCs other than DTC B1622/25 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 CONNECTOR
(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor and side airbag sensor RH.
OK:
Connectors are connected.
NG -- CONNECT CONNECTOR
OK -- Continue to next step.

3. CHECK FLOOR WIRE NO. 2 (OPEN)




(a) Disconnect the connectors from the center airbag sensor and side airbag sensor RH.
(b) Using a service wire, connect terminals S19-2 (VUPR) and S19-1 (ESR) of connector C.
NOTE: Do not forcibly insert a service wire into the terminals of the connector.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

4. CHECK FLOOR WIRE NO. 2 (SHORT)




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






NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

5. CHECK FLOOR WIRE NO. 2 (TO B+)




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






NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

6. CHECK FLOOR WIRE NO. 2 (TO GROUND)




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






NG -- REPAIR OR REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

7. CHECK SIDE AIRBAG SENSOR RH




(a) Connect the connector to the center airbag sensor.
(b) Interchange the side airbag sensor RH with the side airbag sensor LH and connect the connectors to them.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the power switch ON (IG), and wait for at least 60 seconds.
(e) Clear the DTCs DTC Check / Clear.
(f) Turn the power switch OFF.
(g) Turn the power switch ON (IG), and wait for at least 60 seconds.
(h) Check for DTCs DTC Check / Clear.

Result





HINT: DTCs other than DTC B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

C -- REPLACE SIDE AIRBAG SENSOR RH
B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
A -- USE SIMULATION METHOD TO CHECK