Restraint Troubleshooting

B1485

B1486

DTC Description

The Passenger Airbag circuit consists of the SRSCM and the Passenger Airbag (PAB) which has two squib circuits. 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 : 1.6 ~ 4.7 Ohms

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 PAB 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 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 7 and 8 of SRSCM harness connector(A).

Specification (resistance) : 1.6 ~ 4.7 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 4 of PAB harness connector and the terminal 8 of SRSCM harness connector(A).
(2) Measure resistance between the terminal 3 of PAB harness connector and the terminal 7 of SRSCM harness connector(A).

Specification (resistance) : below 1 Ohm






(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






(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 part.