Toyota Venza: Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)

Toyota Venza Service Manual / Supplemental Restraint Systems / Airbag System / Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and accessory meter assembly (passenger airbag ON/OFF indicator).

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger 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.

DTC No.	DTC Detection Condition	Trouble Area
B1660/43	The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the passenger airbag ON/OFF indicator circuit. Accessory meter assembly malfunction Center airbag sensor assembly malfunction	Instrument panel wire No. 2 Instrument panel wire No. 3 Instrument panel wire Accessory meter assembly (Passenger airbag ON/OFF indicator) Center airbag sensor assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Perform the simulation method by selecting check mode (Signal Check) using the Techstream (See page ).
After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road (See page ).

PROCEDURE

1.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Turn the ignition switch to ON.

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

HINT:

Refer to the normal condition of the passenger airbag ON/OFF indicator (See page ).

ON/OFF Indicator Illumination	Proceed to
Always ON	A
OFF	B

GO TO STEP 9

2.	CHECK CONNECTORS

(a) Turn the ignition 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 assembly and accessory meter assembly. Also check that the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire are properly connected.

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 accessory meter assembly. Also disconnect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire.

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

OK:

The terminals are not deformed or damaged.

REPLACE WIRE HARNESS

3.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire.

(b) Connect the connector to the accessory meter assembly.

(d) Turn the ignition switch to ON.

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

OK:

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

GO TO STEP 5

4.	CHECK CENTER AIRBAG SENSOR ASSEMBLY

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

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

(d) Clear the DTCs stored in memory (See page ).

(e) Turn the ignition switch off.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs (See page ).

OK:

DTC B1660/43 is not output.

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly

HINT:

Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

5.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)

(a) Turn the ignition switch off.

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

(c) Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire.

(d) Disconnect the connector from the accessory meter assembly.

(e) 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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-23 (PAON) - F2-11 (P-AB)	Always	Below 1 Ω

Text in Illustration

Accessory Meter Assembly

Center Airbag Sensor Assembly

Front view of wire harness connector

(to Center Airbag Sensor Assembly)

Front view of wire harness connector

(to Accessory Meter Assembly)

Connector B

Connector E

GO TO STEP 17

6.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)

(a) Disconnect SST from connector B.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-23 (PAON) - F2-11 (P-AB)	Always	1 MΩ or higher

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	Front view of wire harness connector (to Accessory Meter Assembly)
*4	Connector E

GO TO STEP 18

7.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-23 (PAON) - Body ground	Always	1 MΩ or higher
F2-11 (P-AB) - Body ground	Always	1 MΩ or higher

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	Front view of wire harness connector (to Accessory Meter Assembly)
*4	Connector E

GO TO STEP 19

8.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)

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

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F2-23 (PAON) - Body ground	Ignition switch ON	Below 1 V
F2-11 (P-AB) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	Front view of wire harness connector (to Accessory Meter Assembly)
*4	Connector E

REPLACE ACCESSORY METER ASSEMBLY

GO TO STEP 20

9.	CHECK CONNECTORS

(a) Turn the ignition switch off.

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

OK:

The connectors are properly connected.

HINT:

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

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

OK:

The terminals are not deformed or damaged.

REPLACE WIRE HARNESS

10.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)

(a) Connect the connectors that link the instrument panel wire, No. 2 instrument panel wire and No. 3 instrument panel wire.

(b) 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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-23 (PAON) - F2-11 (P-AB)	Always	Below 1 Ω

Text in Illustration

Accessory Meter Assembly

Center Airbag Sensor Assembly

Front view of wire harness connector

(to Center Airbag Sensor Assembly)

Front view of wire harness connector

(to Accessory Meter Assembly)

Connector B

Connector E

GO TO STEP 17

11.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)

(a) Disconnect SST from connector B.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-23 (PAON) - F2-11 (P-AB)	Always	1 MΩ or higher

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	Front view of wire harness connector (to Accessory Meter Assembly)
*4	Connector E

GO TO STEP 18

12.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-23 (PAON) - Body ground	Always	1 MΩ or higher
F2-11 (P-AB) - Body ground	Always	1 MΩ or higher

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	Front view of wire harness connector (to Accessory Meter Assembly)
*4	Connector E

GO TO STEP 19

13.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)

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

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F2-23 (PAON) - Body ground	Ignition switch ON	Below 1 V
F2-11 (P-AB) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	Front view of wire harness connector (to Accessory Meter Assembly)
*4	Connector E

GO TO STEP 20

14.	CHECK ACCESSORY METER ASSEMBLY (SOURCE VOLTAGE)

(a) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
F2-13 (IG+) - Body ground	Ignition switch ON	10 to 14 V

Text in Illustration

*1	Front view of wire harness connector (to Accessory Meter Assembly)

REPLACE WIRE HARNESS (ACCESSORY METER ASSEMBLY - BATTERY) OR BATTERY

15.	CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Turn the ignition switch off.

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

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

(e) Turn the ignition switch to ON.

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

Tester Connection	Switch Condition	Passenger Airbag ON/OFF Indicator
D6-23 (PAON) - Body ground	Ignition switch ON	"ON" comes on
D6-17 (P-AB) - Body ground	Ignition switch ON	"OFF" comes on

Text in Illustration

*1	Front view of wire harness connector (to Center Airbag Sensor Assembly)

REPLACE ACCESSORY METER ASSEMBLY

16.	CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch off.

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

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

(e) Turn the ignition switch to ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory (See page ).

(g) Turn the ignition switch off.

(h) Turn the ignition switch to ON, and wait for at least 60 seconds.

(i) Check for DTCs (See page ).

OK:

DTC B1660/43 is not output.

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly

HINT:

Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

17.	CHECK WIRE HARNESS (OPEN)

(a) Disconnect the wire harness from the No. 3 instrument panel wire.

HINT:

SST has already been inserted into connector B.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
EF2-10 (PAON) - EF2-1 (P-AB)	Always	Below 1 Ω

Text in Illustration

*1	Accessory Meter Assembly	*2	Center Airbag Sensor Assembly
*3	No. 3 Instrument Panel Wire	*4	Wire Harness
*5	Front view of wire harness connector (to Center Airbag Sensor Assembly)	*6	Front view of wire harness connector (to No. 3 Instrument Panel Wire)
*7	Connector B	*8	Connector C

REPLACE NO. 3 INSTRUMENT PANEL WIRE

REPLACE WIRE HARNESS

18.	CHECK WIRE HARNESS (SHORT)

(a) Disconnect the wire harness from the No. 3 instrument panel wire.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
EF2-10 (PAON) - EF2-1 (P-AB)	Always	1 MΩ or higher

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	No. 3 Instrument Panel Wire
*4	Wire Harness
*5	Front view of wire harness connector (to No. 3 Instrument Panel Wire)
*6	Connector C

REPLACE NO. 3 INSTRUMENT PANEL WIRE

REPLACE WIRE HARNESS

19.	CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Disconnect the wire harness from the No. 3 instrument panel wire.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
EF2-10 (PAON) - Body ground	Always	1 MΩ or higher
EF2-1 (P-AB) - Body ground	Always	1 MΩ or higher

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	No. 3 Instrument Panel Wire
*4	Wire Harness
*5	Front view of wire harness connector (to No. 3 Instrument Panel Wire)
*6	Connector C

REPLACE NO. 3 INSTRUMENT PANEL WIRE

REPLACE WIRE HARNESS

20.	CHECK WIRE HARNESS (SHORT TO B+)

(a) Turn the ignition switch off.

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

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

(e) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
EF2-10 (PAON) - Body ground	Ignition switch ON	Below 1 V
EF2-1 (P-AB) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Accessory Meter Assembly
*2	Center Airbag Sensor Assembly
*3	No. 3 Instrument Panel Wire
*4	Wire Harness
*5	Front view of wire harness connector (to No. 3 Instrument Panel Wire)
*6	Connector C

REPLACE NO. 3 INSTRUMENT PANEL WIRE

REPLACE WIRE HARNESS

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