Toyota Tundra Service Manual: P Seat Airbag Active Mode Indicator (B1660)

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the lower No. 2 instrument panel airbag assembly, instrument panel passenger without door airbag assembly and front seat airbag assembly RH.

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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• When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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PROCEDURE

(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.

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B

GO TO STEP 7

A

(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 airbag sensor assembly and air conditioning control assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY

OK

(a) Disconnect the connectors from the airbag sensor assembly and telltale light assembly.

*1 Air Conditioning Control Assembly *2 Airbag Sensor Assembly *3 Harness and Connector

(b) Check that the connectors (on the airbag sensor assembly side and air conditioning control assembly side) are not damaged.

OK:

The connectors are not deformed or damaged.

NG

REPLACE HARNESS AND CONNECTOR

OK

(a) Connect the connector to the ari conditioning control assembly.

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

(c) Turn the ignition switch to ON.

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

OK:

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

NG

GO TO STEP 6

OK

(a) Connect the connectors to the airbag sensor assembly.

*1 Air Conditioning Control Assembly *2 Airbag Sensor Assembly

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

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

(d) Clear the DTCs.

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(e) Turn the ignition switch off.

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

(g) Check for DTCs.

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HINT:

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

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIRBAG SENSOR ASSEMBLY

(a) Disconnect the connector from the airbag sensor assembly and air conditioning control assembly.

*1 Air Conditioning Control Assembly *2 Airbag Sensor Assembly *3 Harness and Connector *4 Service Wire *a Front view of wire harness connector (to Air Conditioning Control Assembly) *b Front view of wire harness connector (to Airbag Sensor Assembly)

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

(c) Turn the ignition switch to ON.

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

Standard Voltage:

(e) Turn the ignition switch off.

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

(g) Using a service wire, connect terminals 35 (PAON) and 34 (P-AB) of connector B.

NOTICE:

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

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

Standard Resistance:

(i) Disconnect the service wire from connector B.

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

Standard Resistance:

OK

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

NG

REPLACE HARNESS AND CONNECTOR

(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 airbag sensor assembly and air conditioning control assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY

OK

(a) Disconnect the connectors from the airbag sensor assembly and air conditioning control assembly.

*1 Air Conditioning Control Assembly *2 Airbag Sensor Assembly *3 Harness and Connector

(b) Check that the connectors (on the airbag sensor assembly side and air conditioning control assembly side) are not damaged.

OK:

The connectors are not deformed or damaged.

NG

REPLACE HARNESS AND CONNECTOR

OK

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

*1 Air Conditioning Control Assembly *2 Airbag Sensor Assembly *3 Instrument Panel Wire *4 Service Wire *a Front view of wire harness connector (to Air Conditioning Control Assembly) *b Front view of wire harness connector (to Airbag Sensor Assembly)

(b) Turn the ignition switch to ON.

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

Standard Voltage:

(d) Turn the ignition switch off.

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

(f) Using a service wire, connect terminals 35 (PAON) and 34 (P-AB) of connector B.

NOTICE:

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

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

Standard Resistance:

(h) Disconnect the service wire from connector B.

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

Standard Resistance:

NG

REPLACE HARNESS AND CONNECTOR

OK

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

*a Front view of wire harness connector (to Air Conditioning Control Assembly)

(b) Turn the ignition switch to ON.

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

Standard Voltage:

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

(a) Turn the ignition switch off.

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

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

(c) Connect the connector to the air conditioning control assembly.

(d) Using a service wire, connect terminal 35 (PAON) and body ground.

(e) Using a service wire, connect terminal 34 (P-AB) and body ground.

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

(g) Turn the ignition switch to ON.

(h) Check the indicator according to the table below.

OK:

(i) Disconnect the service wire from airbag sensor assembly.

NG

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

OK

(a) Turn the ignition switch off.

*1 Air Conditioning Control Assembly *2 Airbag Sensor Assembly

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

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

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

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

(f) Clear the DTCs.

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(g) Turn the ignition switch off.

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

(i) Check for DTCs.

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HINT:

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

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIRBAG SENSOR ASSEMBLY