Passenger Airbag ON/OFF Indicator Circuit Malfunction - Airbag System
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction
DTC B1660/43 - Passenger Airbag ON/OFF Indicator Circuit Malfunction
DESCRIPTION
The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and the front passenger seat belt warning light.
This circuit indicates the operation condition of the front passenger airbag assembly, the front passenger side front seat side airbag assembly and passenger side seat belt pretensioner.
DTC B1660/43 is set when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTE: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.
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. Disconnect the connector from the center airbag sensor assembly.
4. Disconnect the connectors from the steering pad.
5. Disconnect the connectors from the front passenger airbag assembly.
6. Disconnect the connector from the front seat outer belt assembly LH.
7. Disconnect the connector from the front seat outer belt assembly RH.
HINT: Skip the following steps if side and curtain shield airbags are not fitted.
8. Disconnect the connector from the front seat side airbag assembly LH.
9. Disconnect the connector from the front seat side airbag assembly RH.
10. Disconnect the connector from the curtain shield airbag assembly LH.
11. Disconnect the connector from the curtain shield airbag assembly RH.
PROCEDURE
1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION
(a) Turn the ignition switch to the on position.
(b) Check the passenger airbag ON/OFF indicator operation.
HINT: Refer to the normal condition of the passenger airbag ON/OFF indicator Diagnosis System.
Result:
B -- CHECK CONNECTION OF CONNECTORS
A -- Continue to next step.
2. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and the front passenger seat belt warning light.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK FRONT PASSENGER SEAT BELT WARNING LIGHT
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the connector from the center airbag sensor 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) Check the passenger airbag ON/OFF indicator operation.
OK:
Neither ON nor OFF passenger airbag ON/OFF indicator comes on.
OK -- CHECK FRONT PASSENGER SEAT BELT WARNING LIGHT
NG -- Continue to next step.
4. CHECK INSTRUMENT PANEL WIRE (FOR OPEN)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) For hatchback models:
(1) Disconnect the connector from the front passenger seat belt warning light.
(2) Using a service wire, connect D27-1 (PAON) and D27-5 (P-AB) of connector C.
NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
(3) Measure the resistance.
Standard resistance:
(d) For sedan models:
(1) Disconnect the connector from the front passenger seat belt warning light.
(2) Using a service wire, connect D77-9 (PAON) and D77-10 (P-AB) of connector C.
NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
(3) Measure the resistance.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
5. CHECK INSTRUMENT PANEL WIRE (FOR SHORT)
(a) Disconnect the service wire from connector C.
(b) Measure the resistance.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
6. CHECK INSTRUMENT PANEL WIRE (TO B+)
(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.
Standard voltage:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
7. CHECK INSTRUMENT PANEL WIRE (TO GROUND)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPLACE FRONT PASSENGER SEAT BELT WARNING LIGHT
8. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and the front passenger seat belt warning light.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
9. CHECK INSTRUMENT PANEL WIRE (FOR OPEN)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) For hatchback models:
(1) Disconnect the connector from the front passenger seat belt warning light.
(2) Using a service wire, connect D27-1 (PAON) and D27-5 (P-AB) of connector C.
NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
(3) Measure the resistance.
Standard resistance:
(d) For sedan models:
(1) Disconnect the connector from the front passenger seat belt warning light.
(2) Using a service wire, connect D77-9 (PAON) and D77-10 (P-AB) of connector C.
NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
(3) Measure the resistance.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
10. CHECK INSTRUMENT PANEL WIRE (FOR SHORT)
(a) Disconnect the service wire from connector B.
(b) Measure the resistance.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
11. CHECK INSTRUMENT PANEL WIRE (TO B+)
(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.
Standard voltage:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
12. CHECK INSTRUMENT PANEL WIRE (TO GROUND)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance.
Standard resistance:
NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
13. CHECK WIRE HARNESS (POWER SOURCE)
(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.
(1) For hatchback models:
Standard voltage (for HATCHBACK):
(2) For sedan models:
Standard voltage (for SEDAN):
NG -- REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK -- Continue to next step.
14. CHECK FRONT PASSENGER SEAT BELT WARNING LIGHT
(a) Turn the ignition switch off.
(b) For hatchback models:
(1) Using a service wire, connect D27-1 (PAON) and D27-4 (ILL-) of the front passenger seat belt warning light connector.
(2) Using a service wire, connect D27-5 (P-AB) and D27-4 (ILL-) of the front passenger seat belt warning light connector.
(c) For sedan models:
(1) Using a service wire, connect D77-9 (PAON) and D77-4 (E) of the front passenger seat belt warning light connector.
(2) Using a service wire, connect D77-10 (P-AB) and D77-4 (E) of the front passenger seat belt warning light connector.
(d) Turn the ignition switch to the on position.
(e) Check the passenger airbag ON/OFF indicator operation.
OK:
Passenger airbag ON/OFF indicator comes on
NG -- REPLACE FRONT PASSENGER SEAT BELT WARNING LIGHT
OK -- Continue to next step.
15. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the connector to the center airbag sensor assembly.
(d) Connect the connector to the front passenger seat belt warning light.
(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 the 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 for DTCs DTC Check / Clear.
OK:
DTC B1660/43 is not output.
HINT: DTCs other than B1660/43 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