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 and passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger airbag, lower No. 2 instrument panel airbag, front seat airbag RH and front seat outer belt RH.

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





WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
* W/ Navigation System:
* After the engine switch is turned off, the display and navigation module display (navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:





* When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
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 CONNECTION OF CONNECTORS
A -- Continue to next step.

2. CHECK CONNECTION OF CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Check that the connectors are properly connected to the center airbag sensor and passenger airbag ON/OFF indicator.

OK:

The connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

3. CHECK CONNECTORS

(a) Disconnect the connectors from the center airbag sensor and passenger airbag ON/OFF indicator.

(b) Check that the connectors (on the center airbag sensor side and passenger airbag ON/OFF indicator side) are not damaged.

OK:

The connectors are not deformed or damaged.





Text in Illustration





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

4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the passenger airbag ON/OFF indicator.





(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

(c) Turn the engine 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 (CENTER AIRBAG SENSOR - PASSENGER AIRBAG ON/OFF INDICATOR)
OK -- Continue to next step.

5. CHECK CENTER AIRBAG SENSOR

(a) Turn the engine switch off.





(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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

(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

(f) Clear the DTCs 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 is not output.

HINT
Codes other than DTC B1660 may be output at this time, but they are not related to this check.

Text in Illustration





NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System

6. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - PASSENGER AIRBAG ON/OFF INDICATOR)

(a) Turn the engine switch off.





Text in Illustration





(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Disconnect the connectors from the center airbag sensor and passenger airbag ON/OFF indicator.

(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

Standard Voltage:

W/ Navigation System





W/O Navigation System





(f) Turn the engine switch off.

(g) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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

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

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

Standard Resistance:

W/ Navigation System





W/O Navigation System





(j) Disconnect the service wire from connector B.

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

Standard Resistance:

W/ Navigation System





W/O Navigation System





Result





B -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY (HEATER CONTROL SWITCH BOARD) Disassembly

A -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

C -- REPLACE INSTRUMENT PANEL WIRE

7. CHECK CONNECTION OF CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Check that the connectors are properly connected to the center airbag sensor and passenger airbag ON/OFF indicator.

OK:

The connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

8. CHECK CONNECTORS

(a) Disconnect the connectors from the center airbag sensor and passenger airbag ON/OFF indicator.

(b) Check that the connectors (on the center airbag sensor side and passenger airbag ON/OFF indicator side) are not damaged.

OK:

The connectors are not deformed or damaged.





Text in Illustration





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

9. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - PASSENGER AIRBAG ON/OFF INDICATOR)

(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.





Text in Illustration





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

Standard Voltage:

W/ Navigation System





W/O Navigation System





(c) Turn the engine switch off.

(d) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

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

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

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

Standard Resistance:

W/ Navigation System





W/O Navigation System





(g) Disconnect the service wire from connector B.

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

Standard Resistance:

W/ Navigation System





W/O Navigation System





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

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

(a) Turn the engine switch off.





(b) Connect the connectors to the center airbag sensor.

(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

(d) 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 HARNESS AND CONNECTOR (PASSENGER AIRBAG ON/OFF INDICATOR - BATTERY) OR BATTERY
OK -- Continue to next step.

11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Turn the engine switch off.





(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Connect the connector to the passenger airbag ON/OFF indicator.

(d) Disconnect the connectors from the center airbag sensor.

(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

OK:





Text in Illustration





Result





B -- REPLACE AIR CONDITIONING CONTROL ASSEMBLY (HEATER CONTROL SWITCH BOARD) Disassembly

A -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
C -- Continue to next step.

12. CHECK CENTER AIRBAG SENSOR

(a) Turn the engine switch off.





(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Connect the connectors to the center airbag sensor.

(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

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

(f) Clear the DTCs 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 is not output.

HINT
Codes other than DTC B1660 may be output at this time, but they are not related to this check.

Text in Illustration





NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System