B1817

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1815/54-B1818/54:

B1817/54 - Short to GND 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 "check mode" (signal check) with the Techstream Check Mode Procedure.
* After selecting "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 Diagnosis System.

PROCEDURE

1. CHECK CONNECTOR

(a) Turn the ignition switch to OFF.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Check that the connector is properly connected to the front passenger airbag.

OK:

The connector is properly connected.

HINT
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(d) Disconnect the connector from the front passenger airbag.

(e) Check that the instrument panel wire assembly connector (on the front passenger airbag side) is not damaged.

OK:

The lock button is not disengaged, or the claw of the lock is not deformed or damaged.

NG -- REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- Continue to next step.

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

(a) Connect the white wire side of SST (resistance: 2.1 Ohms) to connector E (black connector).

CAUTION:
Never connect the tester 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 SST.
* Insert SST straight into the terminals of the connector.

SST : 09843-18061

(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(c) Turn the ignition switch to ON, and wait for at least 60 seconds.

(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch to OFF.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

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.

NG -- CHECK CONNECTOR

OK -- REPLACE FRONT PASSENGER AIRBAG ASSEMBLY Removal

3. CHECK CONNECTOR

(a) Turn the ignition switch to OFF.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Disconnect SST from connector E.

(d) Check that the connector is properly connected to the center airbag sensor assembly.

OK:

The connector is properly connected.

HINT
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(e) Disconnect the connector from the center airbag sensor assembly.

(f) Check that the terminal of the connector is not damaged.

OK:

The terminal is not deformed or damaged.

(g) Check that the short spring for the instrument panel wire connector with the activation prevention mechanism is not deformed or damaged.

OK:

The short spring is not deformed or damaged.

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

4. CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT

(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:

(d) Turn the ignition switch to OFF.

(e) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(f) Measure the resistance according to the value(s) in the table below.

Standard resistance:

(g) Release the activation prevention mechanism built into connector B Diagnosis System.

(h) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- CHECK CONNECTOR
OK -- Continue to next step.

5. CHECK CENTER AIRBAG SENSOR

(a) Restore the released activation prevention mechanism of connector B to the original condition.

(b) Connect the connectors to the front passenger airbag and the center airbag sensor.

(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(d) Turn the ignition switch to ON, and wait for at least 60 seconds.

(e) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(f) Turn the ignition switch to OFF.

(g) Turn the ignition switch to ON, and wait for at least 60 seconds.

(h) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

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.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System

6. CHECK CONNECTOR

(a) Restore the released activation prevention mechanism of connector B to the original condition.

(b) Check that the connectors that link the instrument panel wire assembly and instrument panel wire harness are properly connected.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(c) Disconnect the connectors that link the instrument panel wire assembly and instrument panel wire.

(d) Check that the terminals of the connectors are not damaged.

OK:

The terminals are not deformed or damaged.

(e) Check that the short spring for the instrument panel wire assembly connector with the activation prevention mechanism is not deformed or damaged.

OK:

The short spring is not deformed or damaged.

NG -- REPLACE INSTRUMENT PANEL WIRE ASSEMBLY OR INSTRUMENT PANEL WIRE
OK -- Continue to next step.

7. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)

(g) Release the activation prevention mechanism built into connector B Diagnosis System.

(h) Measure the resistance according to the value(s) in the table below.

Standard resistance:

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE INSTRUMENT PANEL WIRE ASSEMBLY