The detecting system for front crash consists of the SRSCM and two Front Impact Sensors (FIS). The SRSCM sets above DTC(s) if it detects short to ground on the FIS circuit.
DTC | Condition | Probable cause |
B1326 B1331 | ● Short to ground between FIS and SRSCM ● Front Impact Sensor(FIS) Malfunction ● SRSCM Malfunction | ● Short to ground on Wiring Harness ● Front Impact Sensor(FIS) ● SRSCM |
Refer to the DESCRIPTION in this TROUBLESHOOTING part.
PREPARATION
Refer to the DESCRIPTION in this TROUBLESHOOTING part.
CHECK FIS CIRCUIT
Measure resistance between the terminal 1 of FIS harness connector and chassis ground.
specification(resistance) : ∞ Ω
Is the measured resistance within specification?
▶Check Front Impact Sensor.
▶ Repair or replace the wiring harness between the FIS and the SRSCM.
CHECK FRONT IMPACT SENSOR
Replace the front impact sensor(FIS) with a new one.
● Refer to "Front Impact Sensor(FIS)" 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.
Turn the ignition switch to ON and check the vehicle again.
Does Hi-Scan (Pro) indicate any DTC related to FIS?
▶ Go to next step.
▶ Replace the Front Impact Sensor(FIS).
CLEAR THE DTC AND CHECK THE DTC AGAIN
Refer to the DESCRIPTION in this TROUBLESHOOTING part.
