Restraint Troubleshooting

B1473

B1474

B1477

B1478

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 : 1.6 ~ 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 CAB 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 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 10(11) and 9(12) of SRSCM harness connector(B).

Specification (resistance) : 1.6 ~ 4.7 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 2 of CAB harness connector and the terminal 10(11) of SRSCM harness connector(B).
(2) Measure resistance between the terminal 1 of CAB harness connector and the terminal 9(12) of SRSCM harness connector(B).

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 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 part.