B1817

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 assembly and the front passenger airbag assembly.
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 a city or rough road Check Mode Procedure.

PROCEDURE

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




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

SST: 09843-18061
(e) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(f) Turn the engine switch on (IG), and wait for at least 60 seconds.
(g) Clear the DTCs stored in memory DTC Check / Clear.
(h) Turn the engine switch off.
(i) Turn the engine 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 engine switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the SST from connector "E".
(d) Check that the instrument panel wire assembly connectors (on the front passenger airbag assembly side) are not damaged.
OK:
The lock button is not disengaged, or the claw of the lock is not damaged or deformed.
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 connectors from the center airbag sensor assembly.
(b) Check the short to B+ in the circuit.
(1) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(2) Turn the engine switch on (IG).
(3) Measure the voltage according to the value(s) in the table below.
Voltage:





(c) Check the open in the circuit.
(1) Turn the engine switch off.
(2) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Resistance:





(d) Check the short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Resistance:





(e) Check the short in the circuit.
(1) Release the activation prevention mechanism built into connector "B" Diagnosis System.
(2) Measure the resistance according to the value(s) in the table below.
Resistance:






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

4. CHECK CENTER AIRBAG SENSOR ASSEMBLY




(a) Connect the connectors to the front passenger airbag assembly and the center airbag sensor assembly.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the engine switch on (IG), and wait for at least 60 seconds.
(d) Clear the DTCs stored in memory DTC Check / Clear.
(e) Turn the engine switch off.
(f) Turn the engine switch on (IG), and wait for at least 60 seconds.
(g) 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.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK
5. CHECK INSTRUMENT PANEL WIRE




(a) Check the short to B+ in the circuit.
(1) Restore the released activation prevention mechanism of connector "B" to the original condition.
(2) Disconnect the instrument panel wire connector from the instrument panel wire assembly.
(3) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(4) Turn the engine switch on (IG).
(5) Measure the voltage according to the value(s) in the table below.
Voltage:





(b) Check the open in the circuit.
(1) Turn the engine switch off.
(2) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Resistance:





(c) Check the short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Resistance:





(d) Check the short in the circuit.
(1) Release the activation prevention mechanism built into connector "B" Diagnosis System.
(2) Measure the resistance according to the value(s) in the table below.
Resistance:






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

6. CHECK INSTRUMENT PANEL WIRE ASSEMBLY




(a) Check the short to B+ in the circuit.
(1) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(2) Turn the engine switch on (IG).
(3) Measure the voltage according to the value(s) in the table below.
Voltage:





(b) Check the open in the circuit.
(1) Turn the engine switch off.
(2) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Resistance:





(c) Check the short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Resistance:





(d) Check the short in the circuit.
(1) Release the activation prevention mechanism built into the connector "D" Diagnosis System.
(2) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK