B1625

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 parts including the diagnostic circuit and the lateral deceleration sensor.
When 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 set when a malfunction is detected in the side airbag sensor RH circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE
NOTICE: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.

- Turn the ignition switch to the lock position.
- Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
- Disconnect the connector from the center airbag sensor assembly.
- Disconnect the connectors from the steering pad.
- Disconnect the connectors from the front passenger airbag assembly.
- Disconnect the connector from the front seat outer belt assembly LH.
- Disconnect the connector from the front seat outer belt assembly RH.
HINT: Skip the following steps if side and curtain shield airbags are not fitted.

- Disconnect the connector from the front seat side airbag assembly LH.
- Disconnect the connector from the front seat side airbag assembly RH.
- Disconnect the connector from the curtain shield airbag assembly LH.
- Disconnect the connector from the curtain shield airbag assembly RH.

PROCEDURE

1. CHECK DTC

(a) Turn the ignition switch on, and wait for at least 60 seconds.
(b) Clear the DTCs stored in the memory .
(c) Turn the ignition switch off.
(d) Turn the ignition switch on, and wait for at least 60 seconds.
(e) Check the DTCs .
OK:
DTC B1625/22 is not output.
HINT: DTCs 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 ignition 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, rear airbag sensor RH and the side airbag sensor RH.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK FLOOR WIRE (FOR OPEN)

(a) Disconnect the connectors from the center airbag sensor assembly and the side airbag sensor RH.
(b) Using a service wire, connect J16-4 (BBR+) and J16-3 (BBR-) of connector C.
NOTICE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
(c) Measure the resistance.
Standard resistance:

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
4. CHECK FLOOR WIRE (FOR SHORT)

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

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
5. CHECK FLOOR WIRE (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.
Standard voltage:

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
6. CHECK FLOOR WIRE (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.
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 assembly.
(b) Interchange the side airbag sensor RH with the side airbag sensor LH 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 ignition switch to the on position, and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory .
(f) Turn the ignition switch to the lock position.
(g) Turn the ignition switch to the on position, and wait for at least 60 seconds.
(h) Check for DTCs .
Result:

A -- CHECK FLOOR WIRE (FOR OPEN)
B -- REPLACE SIDE AIRBAG SENSOR RH
C -- USE SIMULATION METHOD TO CHECK
9. CHECK FLOOR WIRE (FOR OPEN)

(a) Disconnect the connectors from the side airbag sensor RH and the rear airbag sensor RH.
(b) Using a service wire, connect J14-1 (BCR-) and J14-2 (BCR+) of connector C.
NOTICE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
(c) Measure the resistance.
Standard resistance:

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
10. CHECK FLOOR WIRE (FOR SHORT)

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

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
11. CHECK FLOOR WIRE (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.
Standard voltage:

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
12. CHECK FLOOR WIRE (TO GROUND)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
13. CHECK REAR AIRBAG SENSOR RH

(a) Connect the connectors to the center airbag sensor assembly.
(b) Interchange the side airbag sensor LH with the side airbag sensor 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 ignition switch to the on position, and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory .
(f) Turn the ignition switch to the lock position.
(g) Turn the ignition switch to the on position, and wait for at least 60 seconds.
(h) Check for DTCs .
Result:

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

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