DTC Description

The Side Airbag circuit consists of the SRSCM and four 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

DTC

Condition

Probable cause

B1378

B1379

B1382

B1383

●

Too high or low resistance between SAB high(+) and SAB low (-)

●

Side Airbag (SAB) Malfunction

●

SRSCM Malfunction

●

Open or short circuit on wiring harness

●

Side Airbag (SAB) squib

●

SRSCM

Specification

SAB resistance : 1.804 ~ 2.568 Ω(Driver), 1.812 ~ 2.576 Ω(Passenger)

Schematic Diagram
Terminal ＆ Connector Inspection

Refer to the DESCRIPTION in this TROUBLESHOOTING part.

Inspection Procedure
1.

PREPARATION

Refer to the DESCRIPTION in this TROUBLESHOOTING part.

2.

CHECK SAB RESISTANCE

caution

Never attempt to measure the circuit resistance of the airbag module(squib) even if you are using the specified tester.

(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 20(7) and 19(8) of SRSCM harness connector(B).

SAB resistance : 1.804 ~ 2.568 Ω(Driver), 1.812 ~ 2.576 Ω(Passenger)

(3)

Is the measured resistance within specification?

▶Replace the Side Airbag(SAB) module.

▶Check open circuit.

3.

CHECK OPEN CIRCUIT

(1)

Measure resistance between the terminal 1 of SAB harness connector and the terminal 20(7) of SRSCM harness connector(B).

(2)

Measure resistance between the terminal 2 of SAB harness connector and the terminal 19(8) of SRSCM harness connector(B).

Specification (resistance) : below 1 Ω

(3)

Is the measured resistance within specification?

▶Check short circuit.

▶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?

▶ Go to next step.

▶ 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 part.

Яндекс.Метрика