B1474
DTC B1474The 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:
Schematic Diagram:
SPECIFICATION
CAB resistance : 1.6 - 4.7 ohms
TERMINAL & CONNECTOR INSPECTION
1. Visually inspect all connectors related to the affected circuit for damage and secure connection.
2. Inspect terminals for damage and corrosion.
CAUTION: Avoid damaging connectors during the inspection process.
3. Are any problems found?
NO - Go to next step (INSPECTION PROCEDURE).
YES - After repairing the trouble part, check whether DTC occurs or not.
INSPECTION PROCEDURE
1. PREPARATION
1. Turn the ignition switch to LOCK.
2. Disconnect the battery negative cable from the battery and wait for at least 3 minutes.
3. Remove the DAB module and disconnect the DAB connector.
4. Disconnect the connectors of the PAB, SAB, CAB, BPT, FIS and SIS.
5. Disconnect the SRSCM connector.
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.
A. Connect the Dummy and the Dummy Adapter on CAB harness connector.
- Refer to "SPECIAL SERVICE TOOL" for the SST No. of Dummy and Dummy Adapter.
B. Measure resistance between the terminal 10(11) and 9(12) of SRSCM harness connector(B).
Specification (resistance) : 1.6 - 4.7 ohms
C. Is the measured resistance within specification?
YES - Replace the Curtain Airbag(CAB) module.
NO - Check open circuit.
3. CHECK OPEN CIRCUIT
A. Measure resistance between the terminal 2 of CAB harness connector and the terminal 10(11) of SRSCM harness connector(B).
B. 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
C. 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
A. Measure resistance between the terminal 1 and 2 of CAB harness connector.
Specification (resistance) : infinite
B. 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
1. Install the DAB module and connect the DAB connector.
2. Connect the connector of the PAB, SAB, CAB, BPT, FIS and SIS.
3. Connect the SRSCM connector.
4. Connect the battery negative cable to the battery.
5. Connect a Hi-Scan (Pro) to the data link connector.
6. Turn the ignition switch to ON.
7. Clear the DTC stored in the SRSCM memory with the Hi-Scan (Pro)
8. Turn the ignition switch to LOCK and wait for at least 30 seconds.
9. Turn the ignition switch to ON and wait for at least 30 seconds.
10. Check the vehicle again with the Hi-Scan(Pro).
Does the above DTC(s) go off?
YES - Problem is intermittent or was repaired and SRSCM memory was not cleared.
NO - Replace the SRSCM with a new one and then check the vehicle again. At this time, if the vehicle normally operates with a new one, the fault may be the SRSCM. Replace the SRSCM.