B1808
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1805/52-B1808/52: Short in Front Passenger Side Squib Circuit
B1808/52 - Short to B+ in Front Passenger Side Squib Circuit
DESCRIPTION
The front passenger side squib 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 circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
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 FRONT PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB)
(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.
(d) Connect the white wire side of SST (resistance: 2.1 Ohms) to connector E (orange connector).
CAUTION:
Never connect the tester to the front passenger airbag (front passenger side squib) 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
(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 Reading and Clearing Diagnostic Trouble Codes.
(h) Turn the engine switch off.
(i) Turn the engine switch on (IG), and wait for at least 60 seconds.
(j) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
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 -- CHECK CONNECTOR
OK -- REPLACE FRONT PASSENGER AIRBAG ASSEMBLY Components
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 SST from connector E.
(d) Check that the instrument panel wire connectors (on the front passenger airbag side) are 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.
3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT
(a) Disconnect the connectors from the center airbag sensor.
(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(c) Turn the engine switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(e) Turn the engine switch off.
(f) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(g) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(h) Release the activation prevention mechanism built into connector B Diagnosis System.
(i) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)
OK -- Continue to next step.
4. CHECK CENTER AIRBAG SENSOR
(a) Connect the connectors to the front passenger airbag and the center airbag sensor.
(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 Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the engine switch off.
(f) Turn the engine switch on (IG), and wait for at least 60 seconds.
(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
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 Components
OK -- USE SIMULATION METHOD TO CHECK Diagnosis System
5. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)
(a) Restore the released activation prevention mechanism of connector B to the original condition.
(b) Disconnect the instrument panel wire connector from the instrument panel wire assembly.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the engine switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(f) Turn the engine switch off.
(g) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(i) Release the activation prevention mechanism built into connector B Diagnosis System.
(j) 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