DTC Description

The Seat Belt Pretensioner circuit consists of the SRSCM and two Seat Belt Pretensioners (BPT).

The SRSCM sets above DTC(s) if it detects that the resistance of BPT squib is too high or low.

DTC Detecting Condition

DTC

Condition

Probable cause

B1361

B1362

B1367

B1368

●

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

●

Seat Belt Pretensioner (BPT) Malfunction

●

SRSCM Malfunction

●

Open or short circuit on wiring harness

●

Seat Belt Pretensioner (BPT) squib

●

SRSCM

Specification

BPT resistance : 1.6 ~ 6.1 Ω

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 BPT 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 BPT 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 39(42) and 40(41) of SRSCM harness connector.

Specification (resistance) : 1.6 ~ 6.1 Ω

(3)

Is the measured resistance within specification?

▶ Replace the Seat Belt Pretensioner(BPT) module.

▶Check open circuit.

3.

CHECK OPEN CIRCUIT

(1)

Measure resistance between the terminal 2 of BPT harness connector and the terminal 40(41) of SRSCM harness connector.

(2)

Measure resistance between the terminal 1 of BPT harness connector and the terminal 39(42) 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 BPT and the SRSCM.

4.

CHECK SHORT CIRCUIT

(1)

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

Specification (resistance) : infinite

(2)

Is the measured resistance within specification?

▶ Go to next step.

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

5.

CLEAR THE DTC AND CHECK THE VEHICLE AGAIN

Refer to the DESCRIPTION in this TROUBLESHOOTING part.

Яндекс.Метрика