B1474

DTC Description

The CAB squib circuit consists of the SRSCM and two Curtain Airbags(CAB). It causes the SRS to deploy when the SRS deployment conditions are satisfied. The above DTC is recorded when the CAB resistance too high or low is detected in the CAB squib circuit.

DTC Detecting Condition





Specification

CAB resistance : 1.5 - 4.5 Ohms


Schematic Diagram





Terminal & Connector Inspection

Refer to the DESCRIPTION in this TROUBLESHOOTING section.

Inspection Procedure

1. PREPARATION
Refer to the DESCRIPTION in this TROUBLESHOOTING section.
2. CHECK CAB RESISTANCE

CAUTION:
Never attempt to measure the circuit resistance of the airbag module(squib) with an ohmmeter.

(1) Connect the Dummy and the Dummy Adapter on CAB harness connector.
Refer to "SPECIAL SERVICE TOOL" section in this SERVICE MANUAL for the SST No. of Dummy and Dummy Adapter.
(2) Measure resistance between the terminal 3(5) and 4(6) of SRSCM harness connector(B).

Specification (resistance) : 1.5 - 4.5 Ohms





(3) Is the measured resistance within specification?
YES
>Replace the Curtain Airbag(CAB) module.
NO
>Check open circuit.
3. CHECK OPEN CIRCUIT
(1) Measure resistance between the terminal 1 of CAB harness connector and the terminal 3(5) of SRSCM harness connector(B).
(2) Measure resistance between the terminal 2 of CAB harness connector and the terminal 4(6) of SRSCM harness connector(B).

Specification (resistance) : below 1 Ohms





(3) Is the measured resistance within specification?
YES
>Check short circuit.
NO
>Repair or replace the wiring harness between the CAB and the SRSCM.
4. CHECK SHORT CIRCUIT
(1) Measure resistance between the terminal 1 and 2 of CAB harness connector.

Specification (resistance) : infinite





(2) Is the measured resistance within specification?
YES
> Go to next step.
NO
> Repair or replace the wiring harness between the CAB and the SRSCM.
5. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN
Refer to the DESCRIPTION in this TROUBLESHOOTING section.