B1495
DTC B1495 BELT TENSION SENSOR (BTS) DEFECTDTC DESCRIPTION
The passenger occupant detecting system consists of the SRSCM and the OC module. The SRSCM sets above DTCs if it detects short to battery line or short to ground between BTS and OC module.
DTC Detecting Condition:
Schematic Diagram:
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 SHORT TO GROUND
1. Measure resistance between the terminal 1 of BTS harness connector and chassis ground.
2. Measure resistance between the terminal 2 and 3 of BTS harness connector.
Specification (resistance) : Infinite
3. Is the measured resistance within specification?
YES - Go to next step.
NO - Repair or replace the wiring harness between the BTS and the OC module.
3. CHECK SHORT TO BATTERY LINE
1. Connect the battery negative cable to the battery.
2. Turn the ignition switch to ON.
3. Measure voltage between the terminal 1 of BTS harness connector and chassis ground.
Specification (voltage) : Approximately 0 V
4. Is the measured voltage within specification?
YES - Go to next stop.
NO - Repair the short to battery line circuit on wiring harness between the BTS and the OC module.
4. CHECK BTS CIRCUIT
1. Disconnect the battery negative cable from the battery and wait for at least 3 minutes.
2. Measure resistance between the terminal 1 of BTS harness connector and the terminal 7 of OC module harness connector.
3. Measure resistance between the terminal 2 of BTS harness connector and the terminal 8 of OC module harness connector.
4. Measure resistance between the terminal 3 of BTS harness connector and the terminal 6 of OC module harness connector.
Specification (resistance) : below 1 Ohm
5. Is the measured resistance within specification?
YES - Check Belt Tension Sensor.
NO - Repair or replace the wiring harness between the BTS and the OC module.
5. CHECK THE BELT TENSION SENSOR
1. Replace the Belt Tension Sensor with a new one.
2. Connect the BTS connector.
3. Connect the OC module connector.
4. Connect the SRSCM connector.
5. Connect the battery negative cable to the battery.
6. Connect Hi-Scan (Pro) to the data link connector.
7. Turn the ignition switch to ON and check the vehicle again.
Does Hi-Scan (Pro) indicate any DTC related to Belt Tension Sensor (BTS)?
YES - Go to next step.
NO - Replace BTS (with seat belt).
6. 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.