B1485

DTC Description

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

DTC Detecting Condition





Specification

PAB 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 PAB 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 PAB 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 13 and 14 of SRSCM harness connector(A).

Specification (resistance) : 1.5 - 4.5 Ohms





(3) Is the measured resistance within specification?
YES
> Replace the Passenger Airbag(PAB) module.
NO
> Check open circuit.
3. CHECK OPEN CIRCUIT
(1) Measure resistance between the terminal 3 of PAB harness connector and the terminal 13 of SRSCM harness connector(A).
(2) Measure resistance between the terminal 4 of PAB harness connector and the terminal 14 of SRSCM harness connector(A).

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 PAB and the SRSCM.
4. CHECK SHORT CIRCUIT
(1) Measure resistance between the terminal 3 and 4 of PAB 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 PAB and the SRSCM.
5. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN
Refer to the DESCRIPTION in this TROUBLESHOOTING section.