B1486

DTC B1485 PASSENGER AIRBAG RESISTANCE TOO HIGH (2ND STAGE)
DTC B1486 PASSENGER AIRBAG RESISTANCE TOO HIGH (2ND STAGE)

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:

DTC DETECTING CONDITION

Schematic Diagram:

SCHEMATIC DIAGRAM

SPECIFICATION
PAB resistance : 1.5 - 4.5 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 OF INSPECTION
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 PAB RESISTANCE

CAUTION: Never attempt to measure the circuit resistance of the airbag module (squib) with an ohm meter.

1. Connect the Dummy and the Dummy Adapter on PAB harness connector.
- Refer to "SPECIAL SERVICE TOOL" 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 con nector (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 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 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
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.