Side Airbag Sensor RH Circuit Malfunction - Airbag System

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/21: Side Airbag Sensor RH Circuit Malfunction
B1620/21 - Side Airbag Sensor RH Circuit Malfunction

DESCRIPTION

The side airbag sensor RH consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.

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

DTC B1620/21 is recorded when a malfunction is detected in the side airbag sensor RH circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

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





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

OK:

DTC B1620/21 is not output.

HINT
Codes other than DTC B1620/21 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 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 and the side airbag sensor RH.

OK:

The connectors are connected.

NG -- CONNECT CONNECTORS
OK -- Continue to next step.

3. CHECK FLOOR WIRE (OPEN)

(a) Disconnect the connectors from the center airbag sensor and the side airbag sensor RH.





(b) Using a service wire, connect terminals U13-19 (VUPR) and U13-21 (ESR) of connector "B".

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

5. CHECK FLOOR WIRE (SHORT TO B+)

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





(b) Turn the power switch ON (IG).

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

Standard voltage:





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

6. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the power 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:





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

7. CHECK SIDE AIRBAG SENSOR RH

(a) Connect the connectors to the center airbag sensor.





(b) Interchange the side airbag sensor LH with RH and connect the connectors to them.

(c) Connect the negative (-) terminal cable to the battery, 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 stored in memory 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 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 SIDE AIRBAG SENSOR ASSEMBLY RH

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY

C -- USE SIMULATION METHOD TO CHECK