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 airbag sensor assembly and combination switch assembly (passenger airbag ON/OFF indicator).

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

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

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Service Precautions.

PROCEDURE

1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

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

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

Result:

HINT
Refer to the normal condition of the passenger airbag ON/OFF indicator Diagnosis System.

B -- CHECK CONNECTORS
A -- Continue to next step.

2. CHECK CONNECTORS

(a) Turn the power switch off.

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

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

(c) Check that the connectors are properly connected to the airbag sensor assembly and combination switch assembly.

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 airbag sensor assembly and combination switch assembly.

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

OK:

The terminals are not deformed or damaged.

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

3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the combination switch assembly.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

(c) Turn the power switch on (IG).

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

OK:

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

NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- Continue to next step.

4. CHECK AIRBAG SENSOR ASSEMBLY

(a) Turn the power switch off.

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

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

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

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

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

(f) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.

(g) Turn the power switch off.

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

(i) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

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 AIRBAG SENSOR ASSEMBLY Removal

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

5. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Turn the power switch off.

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

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

(c) Disconnect the connector from the combination switch assembly.

(d) 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 the wire.

SST : 09843-18040

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

Standard Resistance:

Text in Illustration

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

6. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect SST from connector B.

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

Standard Resistance:

Text in Illustration

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

7. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

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

Standard Resistance:

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 (-) auxiliary battery terminal.

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

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

Standard Voltage:

Text in Illustration

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE COMBINATION SWITCH ASSEMBLY Removal

9. CHECK CONNECTORS

(a) Turn the power switch off.

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

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

(c) Check that the connectors are properly connected to the airbag sensor assembly and combination switch assembly.

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 airbag sensor assembly and combination switch assembly.

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

OK:

The terminals are not deformed or damaged.

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 the wire.

SST : 09843-18040

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

Standard Resistance:

Text in Illustration

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

11. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect SST from connector B.

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

Standard Resistance:

Text in Illustration

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

12. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

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

Standard Resistance:

Text in Illustration

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

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

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

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

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

Standard Voltage:

Text in Illustration

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

14. CHECK COMBINATION SWITCH ASSEMBLY (SOURCE VOLTAGE)

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

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

Standard Voltage:

Text in Illustration

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

15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Turn the power switch off.

Text in Illustration

NG -- REPLACE COMBINATION SWITCH ASSEMBLY Removal
OK -- Continue to next step.

16. CHECK AIRBAG SENSOR ASSEMBLY

(a) Turn the power switch off.