Short in Front Passenger Side Squib 2nd Step Circuit - Airbag System

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit

DTC B1815/54 - Short in Front Passenger Side Squib 2nd Step Circuit

DTC B1816/54 - Open in Front Passenger Side Squib 2nd Step Circuit

DTC B1817/54 - Short to GND in Front Passenger Side Squib 2nd Step Circuit

DTC B1818/54 - Short to B+ in Front Passenger Side Squib 2nd Step Circuit

DESCRIPTION

The front passenger side squib 2nd step circuit consists of the center airbag sensor and the front passenger airbag.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the front passenger side squib 2nd step circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE
HINT:
- Perform the simulation method by selecting the "CHECK MODE" (signal check) with the Techstream Check Mode Procedure.
- After selecting the "CHECK MODE" (signal check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on various types of roads Check Mode Procedure.

PROCEDURE

1. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB 2ND STEP)




(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the connector to the front passenger airbag.
(d) Connect SST (resistance 2.1 Ohms) to connector E (black connector).
CAUTION: Never connect SST to the front passenger airbag (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
- Do not forcibly insert SST into the terminals of the connector when connecting.
- Insert SST straight into the terminals of the connector.

SST: 09843-18061
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Turn the power switch ON (IG), and wait for at least 60 seconds.
(g) Clear the DTCs DTC Check / Clear.
(h) Turn the power switch OFF.
(i) Turn the power switch ON (IG), and wait for at least 60 seconds.
(j) Check the DTCs DTC Check / Clear.
OK:
DTC B1815, B1816, B1817, B1818 or 54 is not output.
HINT: Codes other than DTC B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

OK -- REPLACE FRONT PASSENGER AIRBAG ASSEMBLY
NG -- Continue to next step.

2. CHECK CONNECTOR
(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect SST from connector E.
(d) Check that the instrument panel wire assembly connector (on the front passenger airbag side) are not damaged.
OK:
Lock button is not disengaged, and claw of lock is not deformed or damaged.
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- Continue to next step.

3. CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT




(a) Disconnect the connector from the center airbag sensor.
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Turn the power switch ON (IG).
(d) Measure the voltage of the wire harness side connector.
Standard voltage:





(e) Turn the power switch OFF.
(f) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(g) Measure the resistance of the wire harness side connector.
Standard resistance:





(h) Release the activation prevention mechanism built into connector B Diagnosis System.
(i) Measure the resistance of the wire harness side connector.
Standard resistance:






OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
NG -- Continue to next step.

4. CHECK INSTRUMENT PANEL WIRE ASSEMBLY




(a) Restore the released activation prevention mechanism of connector B to its original position.
(b) Disconnect the instrument panel wire connector from the instrument panel wire assembly.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the power switch ON (IG).
(e) Measure the voltage of the wire harness side connector.
Standard voltage:





(f) Turn the power switch OFF.
(g) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(h) Measure the resistance of the wire harness side connector.
Standard resistance:





(i) Release the activation prevention mechanism built into connector B Diagnosis System.
(j) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE