B1660

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction
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 clock assembly*1 or integration control and panel assembly*2.

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag, front passenger side knee airbag, front seat side airbag RH and front seat belt pretensioner RH.

DTC B1660/43 is stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.





* *1: W/ Navigation system

* *2: W/O Navigation system

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Turn the engine switch on (IG).

(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 CONNECTORS
A -- Continue to next step.

2. CHECK CONNECTOR

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connector is properly connected to the center airbag sensor assembly.

OK:

The connector is properly connected.

HINT
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(d) Disconnect the connector from the center airbag sensor assembly.

(e) Check that the terminal of the connector is not damaged.

OK:

The terminal is not deformed or damaged.

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the engine switch on (IG).

(c) Check the passenger airbag ON/OFF indicator operation.

OK:

The passenger airbag ON/OFF indicator does not come on.

NG -- CHECK CONNECTOR
OK -- Continue to next step.

4. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the engine switch off.





(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Connect the connector to the center airbag sensor assembly.

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory DTC Check / Clear.

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 60 seconds.

(i) Check for DTCs DTC Check / Clear.

OK:

DTC B1660/43 is not output.

Text in Illustration





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 Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

5. CHECK CONNECTOR

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connector is properly connected to the clock assembly*1 or integration control and panel assembly*2.

OK:

The connector is properly connected.

HINT
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(d) Disconnect the connector from the clock assembly*1 or integration control and panel assembly*2.

(e) Check that the terminal of the connector is not damaged.

OK:

The terminal is not deformed or damaged.

* *1: W/ Navigation system

* *2: W/O Navigation system

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

6. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.





NOTICE:
Do not forcibly insert SST into the terminals of the connector when connecting.

SST : 09843-18040

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

W/ Navigation System





W/o Navigation System





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

7. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect SST from connector B.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

W/ Navigation System





W/o Navigation System





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

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

(a) Connect the cable to the negative (-) battery terminal.





(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

W/ Navigation System





W/O Navigation System





Result





Text in Illustration





C -- REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Removal

B -- REPLACE CLOCK ASSEMBLY Removal

A -- REPLACE INSTRUMENT PANEL WIRE

9. CHECK CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the center airbag sensor assembly and clock assembly*1 or integration control and panel assembly*2.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the center airbag sensor assembly and clock assembly*1 or integration control and panel assembly*2.

(e) Check that the terminals of the connectors are not damaged.

OK:

The terminals are not deformed or damaged.

* *1: W/ Navigation system

* *2: W/O Navigation system

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

10. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.





NOTICE:
Do not forcibly insert SST into the terminals of the connector when connecting.

SST : 09843-18040

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

W/ Navigation System





W/O Navigation System





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

11. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect SST from connector B.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

W/ Navigation System





W/O Navigation System





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

12. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.





(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

W/ Navigation System





W/O Navigation System





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

13. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

(a) Turn the engine switch on (IG).





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

W/ Navigation System





W/O Navigation System





Text in Illustration





NG -- REPLACE WIRE HARNESS OR BATTERY
OK -- Continue to next step.

14. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Turn the engine switch off.





(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Connect the connector to the clock assembly*1 or integration control and panel assembly*2.

* *1: W/ Navigation system

* *2: W/O Navigation system

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG).

(f) Check the indicator according to the conditions in the table below.

Indicator Condition:





Result





Text in Illustration





C -- REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Removal

B -- REPLACE CLOCK ASSEMBLY Removal
A -- Continue to next step.

15. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the engine switch off.





(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Connect the connector to the center airbag sensor assembly.

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory DTC Check / Clear.

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 60 seconds.

(i) Check for DTCs DTC Check / Clear.

OK:

DTC B1660/43 is not output.

Text in Illustration





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 Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting