The Buckle Pretensioner circuit consists of the SRSCM and two Buckle Pretensioners (BUPT). The SRSCM sets above DTC(s) if it detects short to battery on the BUPT circuit.
DTC | Condition | Probable cause |
B1704 B1709 | ● Short to battery between BUPT and SRSCM ● Seat Buckle Pretensioner (BUPT) Malfunction ● SRSCM Malfunction | ● Short to battery line circuit on wiring harness ● Buckle Pretensioner(BUPT) squib ● SRSCM |
Refer to the DESCRIPTION in this TROUBLESHOOTING part.
PREPARATION
Refer to the DESCRIPTION in this TROUBLESHOOTING part.
CHECK SHORT TO BATTERY LINE
Connect the battery negative cable to the battery.
Turn the ignition switch to ON.
Measure voltage between the terminal 1 of BUPT harness connector and chassis ground.
specification(voltage) : Approximately 0 V
Is the measured voltage within specification?
▶ Check the BUPT Module.
▶ Repair the short to battery line circuit on wiring harness between the BUPT and the SRSCM.
CHECK THE BUPT MODULE
Replace the Buckle Pretensioner(BUPT) with a new one.
● Refer to "Buckle Pretensioner(BUPT)" section in this SERVICE MANUAL.
Install the DAB module and connect the DAB connector.
Connect the connectors of the PAB, SAB, CAB, BPT, BUPT, FIS and SIS.
Connect the SRSCM connector.
Connect the battery negative cable to the battery.
Connect a Hi-Scan(Pro) to the data link connector.
Connect a Hi-Scan(Pro) to the data link connector.
Does Hi-Scan (Pro) indicate any DTC related to Buckle Pretensioner(BUPT)?
▶ Go to next step.
▶Replace BUPT module.
CLEAR THE DTC AND CHECK THE VEHICLE AGAIN
Refer to the DESCRIPTION in this TROUBLESHOOTING part.
