B1378

DTC Description

The Side Airbag circuit consists of the SRSCM and two Side Airbags (SAB). The SRSCM sets above DTC(s) if it detects that the resistance of SAB squib is too high or low.

DTC Detecting Condition





Specification

SAB 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 SAB 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 SAB 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 1(21) and 2(22) of SRSCM harness connector(B).

Specification (resistance) : 1.5 - 4.5 Ohms





(3) Is the measured resistance within specification?
YES
>Replace the Side Airbag(SAB) module.
NO
>Check open circuit.
3. CHECK OPEN CIRCUIT
(1) Measure resistance between the terminal 1 of SAB harness connector and the terminal 1(21) of SRSCM harness connector(B).
(2) Measure resistance between the terminal 2 of SAB harness connector and the terminal 2(22) 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 SAB and the SRSCM.
4. CHECK SHORT CIRCUIT
(1) Measure resistance between the terminal 1 and 2 of SAB 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 SAB and the SRSCM.
5. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN
Refer to the DESCRIPTION in this TROUBLESHOOTING section.