B1660

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 clock assembly.
This circuit indicates the operation condition of the front passenger airbag assembly and the front passenger side - side airbag and front passenger side front seat belt pretensioner.
DTC B1660/43 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

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:
A
The passenger airbag ON/OFF indicator always comes on.
B
The passenger airbag ON/OFF indicator does not come on.
B -- CHECK WIRE HARNESS (SOURCE VOLTAGE OF CLOCK ASSEMBLY)
A -- Continue to next step.
2. CHECK CLOCK ASSEMBLY (PASSENGER AIRBAG ON/OFF INDICATOR)





(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 connector from the clock 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:
The passenger airbag ON/OFF indicator ("ON" and "OFF") do not come on.
NG -- REPLACE CLOCK ASSEMBLY
OK -- Continue to next step.
3. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)





(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable form the battery, and wait for at least 90 seconds.
(c) Disconnect the connectors from the center airbag sensor assembly.
(d) 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 INSTRUMENT PANEL WIRE (SHORT)





(a) 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.
5. CHECK CENTER AIRBAG SENSOR ASSEMBLY





(a) Connect the connectors to the center airbag sensor assembly and the clock 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 B1660/43 is not output.

HINT: Codes other than DTC 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
6. CHECK WIRE HARNESS (SOURCE VOLTAGE OF CLOCK ASSEMBLY)





(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait at least 90 seconds.
(c) Disconnect the connector from the clock 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 -- REPLACE CLOCK ASSEMBLY OR WIRE HARNESS (CLOCK ASSEMBLY - BATTERY) OR BATTERY
OK -- Continue to next step.
7. CHECK INSTRUMENT PANEL WIRE (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 assembly.
(d) Using a service wire, connect A22-23 (PAON) and A22 -17 (P-AB) of connector "B".

NOTE: Do not forcibly insert a service wire into the terminals of connector when connecting.

(e) 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.
8. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)





(a) Disconnect the service wire from connector "B".
(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.
(d) 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.
9. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR ASSEMBLY - BODY 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) 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.
10. CHECK CENTER AIRBAG SENSOR ASSEMBLY





(a) Connect the connectors to the center airbag sensor assembly and the clock assembly.
(b) Connect the connector to the clock 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, 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 the DTCs (DTC Check / Clear).
OK:
DTC B1660/43 is not output.

HINT: Codes other than DTC 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