Side Airbag Sensor RH Circuit Malfunction - Airbag System

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/21,B1622/81,B1625/22,B1627/82: Side Airbag Sensor RH Circuit Malfunction
B1627/82 - Lost communication with Side Airbag Sensor LH

DESCRIPTION

for DTC B1620 and B1625:

The side airbag sensor LH and 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 the SRS should be activated.

DTC B1620/21 or B1625/22 is recorded when a malfunction is detected in the side airbag sensor LH or RH circuit.

for DTC B1622 and B1627:

The circuit for the side collision sensor RH or LH (to determine deployment of the front seat side airbag RH or LH, rear seat side airbag RH or LH, and curtain shield airbag RH or LH) is composed of the center airbag sensor, side airbag sensor RH or LH, and rear airbag sensor RH or LH.

The side airbag sensor RH or LH, and rear airbag sensor RH or LH detect impacts to the vehicle and send signals to the center airbag sensor to determine if the airbag should be deployed.

DTC B1622 or B1627 is recorded when a malfunction is detected in the circuit for the side collision sensor RH or LH (to determine deployment of the front seat side airbag RH or LH, rear seat side airbag RH or LH, and curtain shield airbag RH or LH).





WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

PROCEDURE

1. CHECK FOR DTC

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

(b) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(c) Turn the engine switch off.

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

(e) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTC B1620, B1622, B1625 and B1627 may be output at this time, but they are not related to this check.

B -- CHECK SIDE AIRBAG SENSOR LH

A -- USE SIMULATION METHOD TO CHECK Diagnosis System
C -- Continue to next step.

2. CHECK SIDE AIRBAG SENSOR RH





(a) Turn the engine switch off.

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

(c) Interchange the side airbag sensor RH with LH 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 Reading and Clearing Diagnostic Trouble Codes.

(g) Turn the engine switch off.

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

(i) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTC B1620, B1622, B1625 and B1627 may be output at this time, but they are not related to this check.

(j) Turn the engine switch off.

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

(l) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Components

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

C -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Components

3. CHECK SIDE AIRBAG SENSOR LH





(a) Turn the engine switch off.

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

(c) Interchange the side airbag sensor RH with LH 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 Reading and Clearing Diagnostic Trouble Codes.

(g) Turn the engine switch off.

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

(i) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTC B1620, B1622, B1625 and B1627 maybe output at this time, but they are not related to this check.

(j) Turn the engine switch off.

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

(l) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

B -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Components

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

C -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Components