DTC Description

The Buckle Pretensioner circuit consists of the SRSCM and two Buckle Pretensioners (BUPT). The SRSCM sets above DTC(s) if it detects that the resistance of BUPT squib is too high or low.

DTC Detecting Condition

DTC

Condition

Probable cause

B1701

B1702

B1706

B1707

●

Too high or low resistance between BUPT high(+) and BUPT low (-)

●

Seat Buckle Pretensioner (BUPT) Malfunction

●

SRSCM Malfunction

●

Open or short circuit on wiring harness

●

Seat Buckle Pretensioner (BUPT) squib

●

SRSCM

Specification

BUPT resistance : 1.905 ~ 2.769Ω (Driver), 1.912 ~ 2.776Ω (Passenger)

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 BUPT 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 BUPT 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 16(13) and 15(14) of SRSCM harness connector.

BUPT resistance : 1.905 ~ 2.769Ω (Driver), 1.912 ~ 2.776Ω (Passenger)

(3)

Is the measured resistance within specification?

▶ Replace the Buckle Pretensioner(BUPT) module.

▶ Check open circuit.

3.

CHECK OPEN CIRCUIT

(1)

Measure resistance between the terminal 1 of BUPT harness connector and the terminal 16(13) of SRSCM harness connector.

(2)

Measure resistance between the terminal 2 of BUPT harness connector and the terminal 15(14) of SRSCM harness connector.

specification(resistance) : below 1 Ω

(3)

Is the measured resistance within specification?

▶ Check short circuit.

▶ Repair or replace the wiring harness between the BUPT and the SRSCM.

4.

CHECK SHORT CIRCUIT

(1)

Measure resistance between the terminal 1 and 2 of BUPT harness connector.

specification(resistance) : infinite

(2)

Is the measured resistance within specification?

▶ Go to next step.

▶ Repair or replace the wiring harness between the BUPT and the SRSCM.

5.

CLEAR THE DTC AND CHECK THE VEHICLE AGAIN

Refer to the DESCRIPTION in this TROUBLESHOOTING part.

Яндекс.Метрика