B1334

DTC B1334 Front Impact Sensor [Passenger] Communication Error

CIRCUIT DESCRIPTION

The crash detection for airbag system consists of the SRSCM, FIS and SIS. If a FIS is defected or communication error occurs in FIS circuit, the above DTCs will be recorded.

Wiring Diagram:

INSPECTION PROCEDURE

1. Preparation
1. Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.
2. Disconnect the connector of FIS.

3. Disconnect the connector of the SRSCM.




2. Check FIS circuit (Communication error).

CHECK: Check the continuity between SRSCM and the FIS [High (+) and Low (-)].

OK: Continuity

NG: Repair or replace the harness or the connector between the SRSCM and the FIS.

OK: Check the SRSCM

3. Check the FIS (Defect)

PREPARATION
1. Turn ignition switch to LOCK.
2. Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.
3. Connect the SRSCM connector and the FIS connector.




4. Connect the negative (-) terminal cable from the battery, and wait at least 30 seconds.

CHECK:
1. Turn the ignition switch to ON, and wait at least 30 seconds.
2. Clear the malfunction code stored in memory with the Hi-Scan Pro.
3. Turn the ignition switch to LOCK, and wait at least 30 seconds.
4. Turn the ignition switch to ON, and wait at least 30 seconds.

5. Using the Hi-Scan Pro, check for DTCs.
There is no DTC

HINT: Codes other than these may be output at this time, but they are not relevant to this procedure.

NG: Replace the FIS.

OK: Check the SRSCM.