B1660

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 and the front passenger seat belt warning light.
This circuit indicates the operation condition of the front passenger airbag, front passenger side airbag 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

PROCEDURE

1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION
(a) Turn the power switch ON (IG).
(b) Check the passenger airbag ON / OFF indicator operation.

Result

B -- CHECK CONNECTION OF CONNECTOR
A -- Continue to next step.

2. CHECK CONNECTION OF CONNECTOR
(a) Turn the power 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 the front passenger seat belt warning light.
OK:
Connectors are connected.
NG -- CONNECT CONNECTOR
OK -- Continue to next step.

3. CHECK FRONT PASSENGER AIRBAG ON/OFF INDICATOR LIGHT

(a) Disconnect the connector from the center airbag sensor.
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Turn the power switch ON (IG).
(d) Check the passenger airbag ON / OFF indicator operation.
OK:
Neither ON nor OFF passenger airbag ON / OFF indicator comes on.
OK -- CHECK FRONT PASSENGER AIRBAG ON/OFF INDICATOR LIGHT
NG -- Continue to next step.

4. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the connector from the front passenger seat belt warning light.
(d) Using a service wire, connect terminals F11-1 (PAON) and F11-5 (P-AB) of connector C.
NOTE: Do not forcibly insert a service wire into the terminals of the connector.
(e) Measure the resistance of the wire harness side connector.
Standard resistance:

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

5. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the service wire from connector C.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:

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

6. CHECK INSTRUMENT PANEL WIRE (TO B+)

(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Turn the power switch ON (IG).
(c) Measure the voltage of the wire harness side connector.
Standard voltage:

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

7. CHECK INSTRUMENT PANEL WIRE (TO GROUND)

(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPLACE FRONT PASSENGER AIRBAG ON/OFF INDICATOR LIGHT
8. CHECK CONNECTION OF CONNECTOR
(a) Turn the power 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 the front passenger seat belt warning light.
OK:
Connectors are connected.
NG -- CONNECT CONNECTOR
OK -- Continue to next step.

9. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Disconnect the connector from the center airbag sensor and the front passenger seat belt warning light.
(b) Using a service wire, connect terminals F11-1 (PAON) and F11-5 (P-AB) of connector C.
NOTE: Do not forcibly insert a service wire into the terminals of the connector.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:

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

10. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the service wire from connector C.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:

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

11. CHECK INSTRUMENT PANEL WIRE (TO B+)

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

12. CHECK INSTRUMENT PANEL WIRE (TO GROUND)

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

13. CHECK WIRE HARNESS (POWER SOURCE)

NG -- REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK -- Continue to next step.

14. CHECK FRONT PASSENGER AIRBAG ON/OFF INDICATOR LIGHT

(a) Turn the power switch OFF.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Using a service wire, connect terminals F11-5 (P-AB) and F11-4 (PBEW) of the front passenger seat belt warning light.
(d) Using a service wire, connect terminals F11-1 (PAON) and F11-4 (PBEW) of the front passenger seat belt warning light.
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Turn the power switch ON (IG).
(g) Check the front passenger airbag ON / OFF indicator operation.
OK:
Front passenger airbag ON / OFF indicator comes on
NG -- REPLACE FRONT PASSENGER AIRBAG ON/OFF INDICATOR LIGHT
OK -- Continue to next step.

15. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the power 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 and the front passenger seat belt warning light.
(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(e) Turn the power switch ON (IG), and wait for at least 60 seconds.
(f) Clear the DTCs DTC Check / Clear.
(g) Turn the power switch OFF.
(h) Turn the power switch ON (IG), and wait for at least 60 seconds.
(i) Check for DTCs DTC Check / Clear.
OK:
DTC B1660/43 is not output.
HINT: DTCs 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