B1625

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1625/22: Side Airbag Sensor LH Circuit Malfunction

DTC B1625/22 - Side Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The side airbag sensor assembly LH 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 side airbag sensor assembly assembly LH circuit.






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 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.

OK -- USE SIMULATION METHOD TO CHECK
NG -- Continue to next step.
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 center airbag sensor assembly and the side airbag sensor assembly LH.
OK:
The connectors are connected.
NG -- CONNECT CONNECTORS, THEN GO TO STEP 1
OK -- Continue to next step.
3. CHECK FLOOR WIRE NO.2 (OPEN)





(a) Disconnect the connectors from the center airbag sensor assembly and the side airbag sensor assembly LH.
(b) Using a service wire, connect V16-22 (VUPL) and V16-20 (ESL) 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.
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 "B".
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE FLOOR WIRE NO.2
OK -- Continue to next step.
5. 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 engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Voltage:






NG -- REPAIR OR REPLACE FLOOR WIRE NO.2
OK -- Continue to next step.
6. CHECK FLOOR WIRE NO.2 (SHORT TO GROUND)





(a) Turn the engine 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.
Resistance:






NG -- REPAIR OR REPLACE FLOOR WIRE NO.2
OK -- Continue to next step.
7. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH





(a) Connect the connectors to the center airbag sensor assembly.
(b) Interchange the side airbag sensor assembly 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 engine switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory DTC Check / Clear.
(f) Turn the engine switch off.
(g) Turn the engine 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 B1621/22 may be output at this time, but they are not related to this check.

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