DTC    B1646/29    Passenger Side Rear Sensor Circuit Malfunction

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DESCRIPTION

The passenger side rear airbag sensor consists of the safing sensor, the diagnostic circuit, the rear deceleration sensor, etc.
If the center airbag sensor assembly receives signals from the rear deceleration sensor, it determines whether the SRS should be activated.
DTC B1646/29 is recorded when a malfunction is detected in the passenger side rear airbag sensor circuit.

DTC No.
DTC Detection Condition
Trouble Area
B1646/29
When one of following conditions is met:
  1. Passenger side rear airbag sensor malfunction
  2. Center airbag sensor assembly malfunction
  1. Passenger side rear airbag sensor
  2. Center airbag sensor assembly

WIRING DIAGRAM


C195582E03


C195582E04


INSPECTION PROCEDURE

1.CHECK PASSENGER SIDE REAR AIRBAG SENSOR
C148441E13

  1. Turn the ignition switch off.

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

  1. Interchange the driver side rear airbag sensor with the passenger side rear airbag sensor and connect the connectors to them.

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

  1. Turn the ignition switch to ON, and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 60 seconds.

  1. Check for DTCs (Click here).
    Result 
    Result
    		Proceed to
    DTC B1641/19 and B1646/29 are not output.
    		A
    DTC B1646/29 is output.
    		B
    DTC B1641/19 is output.
    		C
    Text in Illustration 
    *1
    		Driver Side Rear Airbag Sensor
    *2
    		Passenger Side - Side Airbag Sensor (for Rear Side)

    HINT:
    DTCs other than B1641/19 and B1646/29 may be output at this time, but they are not related to this check.



A
USE SIMULATION METHOD TO CHECK (Click here)

B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)
C

REPLACE PASSENGER SIDE REAR AIRBAG SENSOR (Click here)