B1808
AIRBAG SYSTEM: B1805/52: Short in Front Passenger Side Squib Circuit
DTC B1805/52 - Short in Front Passenger Side Squib Circuit
DTC B1806/52 - Open in Front Passenger Side Squib Circuit
DTC B1807/52 - Short to GND in Front Passenger Side Squib Circuit
DTC B1808/52 - Short to B+ in Front Passenger Side Squib Circuit
DESCRIPTION
The front passenger side squib 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 circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
- Perform the simulation method by selecting the "check mode" (signal check) with 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)
(a) Turn the ignition switch to the LOCK position.
(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 "C" (black connector).
CAUTION: Never connect a tester to the front passenger airbag assembly (Front passenger side squib) for measurement, as the 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 straight 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 ignition switch to the ON position, and wait for at least 60 seconds.
(g) Clear the DTCs stored in memory (DTC Check / Clear).
(h) Turn the ignition switch to the LOCK position.
(i) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(j) Check the DTCs (DTC Check / Clear).
OK:
DTC B1805, B1806, B1807, B1808 or 52 is not output.
HINT: Codes other than DTC B1805, B1806, B1807, B1808 and 52 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 ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect SST from connector "C".
(d) Check that the instrument panel wire 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 deformed or damaged.
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
3. CHECK INSTRUMENT PANEL WIRE (FRONT PASSENGER SIDE SQUIB 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 ignition switch to the ON position.
(3) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(c) Check the open in the circuit.
(1) Turn the ignition switch to the LOCK position.
(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.
Standard resistance:
(d) Check the short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(e) Check for 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.
Standard resistance:
NG -- REPAIR OR REPLACE 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 ignition switch to the ON position, and wait for at least 60 seconds.
(d) Clear the DTCs stored in memory (DTC Check / Clear).
(e) Turn the ignition switch to the LOCK position.
(f) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(g) Check the DTCs (DTC Check / Clear).
OK:
DTC B1805, B1806, B1807, B1808 or 52 is not output.
HINT: Codes other than DTC B1805, B1806, B1807, B1808 and 52 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