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

DESCRIPTION

The front passenger side - side airbag sensor consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.

If the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.

DTC B1625/22 is recorded when a malfunction is detected in the front passenger side - side airbag sensor circuit.





HINT
Troubleshoot DTC B1625/22 first when DTC B1625/22 and B1635/24 are output simultaneously.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

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





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

(c) Turn the engine switch off.

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

(e) Check the DTCs DTC Check / Clear.

OK:

DTC B1625/22 is not output.

HINT
Codes other than DTC B1625/22 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 engine 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 front passenger side - side airbag sensor and the front passenger side rear airbag sensor.

OK:

The connectors are properly connected.

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

3. CHECK FLOOR WIRE

(a) Disconnect the connectors from the front passenger side - side airbag sensor and the front passenger side rear airbag sensor.





(b) Using a service wire, connect P5-2 (BBR+) and P5-1 (BBR-) of connector "C".

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

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

Standard resistance:





NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

4. CHECK FRONT PASSENGER SIDE - SIDE AIRBAG SENSOR

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





(b) Connect the connector to the front passenger side rear airbag sensor.

(c) Interchange the front passenger side - side airbag sensor with the driver side - side airbag sensor and connect the connectors to them.

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

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

(f) Clear the DTCs stored in the memory DTC Check / Clear.

(g) Turn the engine switch off.

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

(i) Check the DTCs DTC Check / Clear.

Result:





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

B -- REPLACE FRONT PASSENGER SIDE - SIDE AIRBAG SENSOR

A -- CHECK FRONT PASSENGER SIDE REAR AIRBAG SENSOR

C -- USE SIMULATION METHOD TO CHECK

5. CHECK FRONT PASSENGER SIDE REAR AIRBAG SENSOR

(a) Turn the engine switch off.





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

(c) Return the driver side - side airbag sensor and front passenger side - side airbag sensor to their original positions and connect the connectors to them.

(d) Interchange the front passenger side rear airbag sensor with the driver side rear airbag sensor and connect the connectors to them.

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

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

(g) Clear the DTCs stored in the memory DTC Check / Clear.

(h) Turn the engine switch off.

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

(j) Check the DTCs DTC Check / Clear.

Result:





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

B -- REPLACE FRONT PASSENGER SIDE REAR AIRBAG SENSOR

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY

C -- USE SIMULATION METHOD TO CHECK