B1818
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM:
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 (dual stage - 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 (dual stage - 2nd step) circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FOR DTC
(a) Proceed to each step according to DTC readings.
(1) If using the intelligent tester (read the 5-digit of DTC):
Using the intelligent tester, check for DTCs DTC Check / Clear.
Result
(2) If not using the intelligent tester (read the 2-digit of DTC):
Check for DTCs DTC Check / Clear.
Result
E -- CHECK CONNECTOR
D -- CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (TO B+)
C -- CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (TO GROUND)
B -- CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (OPEN)
A -- Continue to next step.
2. CHECK CONNECTOR
(a) 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 -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- Continue to next step.
3. CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (SHORT)
(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 center airbag sensor.
(d) Disconnect the connectors from the front passenger airbag.
(e) Release the activation prevention mechanism built into connector "B" Diagnosis System.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK INSTRUMENT PANEL WIRE (SHORT)
OK -- CHECK CENTER AIRBAG SENSOR ASSEMBLY
4. CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (OPEN)
(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 center airbag sensor.
(d) Disconnect the connectors from the front passenger airbag.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- CHECK CENTER AIRBAG SENSOR ASSEMBLY
5. CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (TO GROUND)
(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 center airbag sensor.
(d) Disconnect the connectors from the front passenger airbag.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK INSTRUMENT PANEL WIRE (TO GROUND)
OK -- CHECK CENTER AIRBAG SENSOR ASSEMBLY
6. CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT (TO B+)
(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 center airbag sensor.
(d) Disconnect the connectors from the front passenger airbag.
(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.
(g) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(h) Before proceeding to the next step, perform the following procedures.
(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.
NG -- CHECK INSTRUMENT PANEL WIRE (TO B+)
OK -- CHECK CENTER AIRBAG SENSOR ASSEMBLY
7. 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) 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 -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- Continue to next step.
8. CHECK FRONT PASSENGER SIDE SQUIB (DUAL STAGE - 2ND STEP) CIRCUIT
(a) Disconnect the connectors from the center airbag sensor.
(b) Disconnect the connectors from the front passenger airbag.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the ignition switch to the ON position.
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(f) Turn the ignition switch to the LOCK position.
(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 -- CHECK INSTRUMENT PANEL WIRE
OK -- Continue to next step.
9. REPLACE FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB, DUAL STAGE - 2ND STEP)
(a) Replace the front passenger airbag and connect the connectors.
HINT: Perform the inspection using parts from a normal vehicle if possible.
(b) Connect the connectors to 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 the ON position, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory DTC Check / Clear.
(f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(h) Check for DTCs DTC Check / Clear.
OK:
DTC 54 is not output.
HINT: Codes other than code 54 may be output at this time, but they are not related to this check.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- END
10. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Restore the released activation prevention mechanism of connector "B" to the original condition.
(b) Connect the connectors to 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 the ON position, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory DTC Check / Clear.
(f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(h) Check for DTCs DTC Check / Clear.
OK:
DTC B1815 is not output.
HINT: Codes other than code B1815 may be output at this time, but they are not related to this check.
OK -- CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB, DUAL STAGE - 2ND STEP)
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
11. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Connect the connectors to the center airbag sensor.
(b) Using a service wire, connect A15-2 (P2+) and A15-1 (P2-) of connector "E".
NOTICE:
- Twist the end of the service wire in order to insert it into the connector.
- Do not forcibly insert the twisted service wire into the terminals of the connector when connecting.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the ignition switch on the ON position, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory DTC Check / Clear.
(f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(h) Check for DTCs DTC Check / Clear.
OK:
DTC B1816, B1817 or B1818 is not output.
HINT: Codes other than code B1816, B1817 or B1818 may be output at this time, but they are not related to this check.
(i) Before proceeding to the next step, perform the following procedures.
(1) Disconnect the service wire from connector "E".
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- Continue to next step.
12. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB, DUAL STAGE - 2ND STEP)
(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) Connect the connector to the front passenger airbag.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(f) Clear the DTCs stored in memory DTC Check / Clear.
(g) Turn the ignition switch to the LOCK position.
(h) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(i) Check for DTCs DTC Check / Clear.
OK:
DTC B1815, B1816, B1817 or B1818 is not output.
HINT: Codes other than code B1815, B1816, B1817 or B1818 may be output at this time, but they are not related to this check.
NG -- REPLACE FRONT PASSENGER AIRBAG ASSEMBLY
OK -- PERFORM SYMPTOM SIMULATION
13. CHECK INSTRUMENT PANEL WIRE (SHORT)
(a) Disconnect the instrument panel wire connector from the instrument panel wire assembly.
HINT: The activation prevention mechanism of connector "B" has already been released.
(b) 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.
14. CHECK INSTRUMENT PANEL WIRE ASSEMBLY (SHORT)
(a) Release the activation prevention mechanism built into connector "D" Diagnosis System.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- PERFORM SYMPTOM SIMULATION
15. CHECK INSTRUMENT PANEL WIRE (OPEN)
(a) Disconnect the instrument panel wire connector from the instrument panel wire assembly.
(b) 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.
16. CHECK INSTRUMENT PANEL WIRE ASSEMBLY (OPEN)
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- PERFORM SYMPTOM SIMULATION
17. CHECK INSTRUMENT PANEL WIRE (TO GROUND)
(a) Disconnect the instrument panel wire connector from the instrument panel wire assembly.
(b) 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.
18. CHECK INSTRUMENT PANEL WIRE ASSEMBLY (TO GROUND)
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- PERFORM SYMPTOM SIMULATION
19. CHECK INSTRUMENT PANEL WIRE (TO B+)
(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 instrument panel wire connector from the instrument panel wire assembly.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
20. CHECK INSTRUMENT PANEL WIRE ASSEMBLY (TO B+)
(a) Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.
Standard voltage:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- PERFORM SYMPTOM SIMULATION
21. CHECK INSTRUMENT PANEL WIRE
(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 ignition switch to the ON position.
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(f) Turn the ignition switch to the LOCK position.
(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 -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
22. CHECK INSTRUMENT PANEL WIRE ASSEMBLY
(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(d) Turn the ignition switch to the LOCK position.
(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 "D" Diagnosis System.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE ASSEMBLY
OK -- PERFORM SYMPTOM SIMULATION