Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: P Seat Airbag Active Mode Indicator (B1660)

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / 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 (radio receiver assembly).

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger airbag assembly and front seat cushion airbag assembly RH.

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B1660

P Seat Airbag Active Mode Indicator
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the passenger airbag ON/OFF indicator circuit.
  • Passenger airbag ON/OFF indicator malfunction
  • Airbag sensor assembly malfunction
for TMC Made:
  • Instrument panel wire
  • Floor wire
  • Passenger airbag ON/OFF indicator (Radio receiver assembly)
  • Airbag sensor assembly
for TMMC Made:
  • Instrument panel wire
  • Instrument panel junction block assembly
  • Passenger airbag ON/OFF indicator (Radio receiver assembly)
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

for TMC Made: for TMMC Made:

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the engine 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.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK VEHICLE CONDITION

(a) Choose the model to be inspected.

Result

Proceed to

for TMC Made

A

for TMMC Made

B
B

GO TO STEP 16

A

2.

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.

Click here

Result

Proceed to

Passenger airbag ON/OFF indicator illumination is always on.

A

Passenger airbag ON/OFF indicator illumination is always off.

B
B

GO TO STEP 9

A

3.

CHECK CONNECTION OF CONNECTORS

(a) Turn the engine switch off.

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

CAUTION:

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

(c) Check that the connectors are properly connected to the airbag sensor assembly and radio receiver assembly. Also check that the connectors that link the floor wire and instrument panel wire are properly connected.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

4.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag sensor assembly and radio receiver assembly. Also disconnect the connectors that link the floor wire and instrument panel wire.

(b) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE INSTRUMENT PANEL WIRE OR FLOOR WIRE
OK

5.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Connect the connector to the radio receiver assembly.

(b) Connect the connectors that link the floor wire and instrument panel wire.

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

(d) Turn the engine switch on (IG).

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

OK:

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

NG

GO TO STEP 7

OK

6.

CHECK DTC

(a) Turn the engine switch off.

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

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

CAUTION:

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

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

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

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

(f) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(g) Turn the engine switch off.

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

(i) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE AIRBAG SENSOR ASSEMBLY

7.

CHECK WIRE HARNESS

(a) Turn the engine switch off.

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

*3

Instrument Panel Wire

*4

Floor Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

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

CAUTION:

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

(c) Disconnect the connector from the radio receiver assembly.

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

(e) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - Body ground

Engine switch on (IG)

Below 1 V

J151-8 (AIR) - Body ground

Engine switch on (IG)

Below 1 V

(g) Turn the engine switch off.

(h) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(i) 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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

Below 1 Ω

(k) Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

1 MΩ or higher

J151-9 (ARON) - Body ground

Always

1 MΩ or higher

J151-8 (AIR) - Body ground

Always

1 MΩ or higher
OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

8.

CHECK FLOOR WIRE

(a) Disconnect the floor wire connector from the instrument panel wire.

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

*3

Instrument Panel Wire

*4

Floor Wire

*a

Front view of wire harness connector

(to Instrument Panel Wire)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

JR1-15 (PAON) - JR1-16 (PAON)

Always

Below 1 Ω

JR1-13 (P-AB) - JR1-14 (P-AB)

Always

Below 1 Ω

JR1-15 (PAON) - Body ground or other terminals

Always

1 MΩ or higher

JR1-13 (P-AB) - Body ground or other terminals

Always

1 MΩ or higher
OK

REPLACE INSTRUMENT PANEL WIRE
NG

REPLACE FLOOR WIRE

9.

CHECK CONNECTION OF CONNECTORS

(a) Turn the engine switch off.

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

CAUTION:

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

(c) Check that the connectors are properly connected to the airbag sensor assembly and radio receiver assembly. Also check that the connectors that link the floor wire and instrument panel wire are properly connected.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

10.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag sensor assembly and radio receiver assembly. Also disconnect the connectors that link the floor wire and instrument panel wire.

(b) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE INSTRUMENT PANEL WIRE OR FLOOR WIRE
OK

11.

CHECK WIRE HARNESS

(a) Connect the connectors that link the floor wire and instrument panel wire.

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

*3

Instrument Panel Wire

*4

Floor Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

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

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - Body ground

Engine switch on (IG)

Below 1 V

J151-8 (AIR) - Body ground

Engine switch on (IG)

Below 1 V

(e) Turn the engine switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

Below 1 Ω

(i) Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

1 MΩ or higher

J151-9 (ARON) - Body ground

Always

1 MΩ or higher

J151-8 (AIR) - Body ground

Always

1 MΩ or higher
NG

GO TO STEP 15

OK

12.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

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

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

*3

Instrument Panel Wire

*4

Floor Wire

*a

Front view of wire harness connector

(to Radio Receiver Assembly)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J151-19 (IG) - Body ground

Engine switch on (IG)

11 to 14 V

(d) Turn the engine switch off.

(e) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

NG

REPLACE WIRE HARNESS OR BATTERY
OK

13.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the radio receiver assembly.

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

*3

Instrument Panel Wire

*4

Floor Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

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

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

(d) Check the passenger airbag ON/OFF indicator according to the conditions in the table below.

OK:

Terminal Connection

Condition

Specified Condition

J142-35 (PAON) - Body ground

Engine switch on (IG)

"ON" comes on

J142-34 (P-AB) - Body ground

Engine switch on (IG)

"OFF" comes on

(e) Turn the engine switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

NG

REPLACE RADIO RECEIVER ASSEMBLY

OK

14.

CHECK DTC

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

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

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

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

(d) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(e) Turn the engine switch off.

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

(g) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE AIRBAG SENSOR ASSEMBLY

15.

CHECK FLOOR WIRE

(a) Disconnect the floor wire connector from the instrument panel wire.

*1

Airbag Sensor Assembly

*2

Radio Receiver Assembly

*3

Instrument Panel Wire

*4

Floor Wire

*a

Front view of wire harness connector

(to Instrument Panel Wire)

-

-

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

JR1-15 (PAON) - JR1-16 (PAON)

Always

Below 1 Ω

JR1-13 (P-AB) - JR1-14 (P-AB)

Always

Below 1 Ω

JR1-15 (PAON) - Body ground or other terminals

Always

1 MΩ or higher

JR1-13 (P-AB) - Body ground or other terminals

Always

1 MΩ or higher
OK

REPLACE INSTRUMENT PANEL WIRE
NG

REPLACE FLOOR WIRE

16.

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.

Click here

Result

Proceed to

Passenger airbag ON/OFF indicator illumination is always on.

A

Passenger airbag ON/OFF indicator illumination is always off.

B
B

GO TO STEP 23

A

17.

CHECK CONNECTION OF CONNECTORS

(a) Turn the engine switch off.

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

CAUTION:

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

(c) Check that the connectors are properly connected to the airbag sensor assembly, radio receiver assembly and instrument panel junction block assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

18.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag sensor assembly, radio receiver assembly and instrument panel junction block assembly.

(b) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE INSTRUMENT PANEL WIRE
OK

19.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Connect the connector to the radio receiver assembly and instrument panel junction block assembly.

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

(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

GO TO STEP 21

OK

20.

CHECK DTC

(a) Turn the engine switch off.

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

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

CAUTION:

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

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

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

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

(f) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(g) Turn the engine switch off.

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

(i) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE AIRBAG SENSOR ASSEMBLY

21.

CHECK WIRE HARNESS

(a) Turn the engine switch off.

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

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

CAUTION:

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

(c) Disconnect the connector from the radio receiver assembly.

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

(e) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - Body ground

Engine switch on (IG)

Below 1 V

J151-8 (AIR) - Body ground

Engine switch on (IG)

Below 1 V

(g) Turn the engine switch off.

(h) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(i) 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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

Below 1 Ω

(k) Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

1 MΩ or higher

J151-9 (ARON) - Body ground

Always

1 MΩ or higher

J151-8 (AIR) - Body ground

Always

1 MΩ or higher
OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

22.

CHECK INSTRUMENT PANEL WIRE

(a) Disconnect the connector from the instrument panel junction block assembly.

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

*b

Front view of wire harness connector

(to Airbag Sensor Assembly)

*c

Front view of wire harness connector

(to Radio Receiver Assembly)

-

-

(b) 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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-8 (PAON) - 2A-46 (P-AB)

Always

Below 1 Ω

(d) Disconnect the service wire from connector B.

(e) Using a service wire, connect terminals 9 (ARON) and 8 (AIR) of connector E.

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-29 (PAON) - 2A-51 (P-AB)

Always

Below 1 Ω

(g) Disconnect the service wire from connector E.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-8 (PAON) - Body ground or other terminals

Always

1 MΩ or higher

2A-29 (PAON) - Body ground or other terminals

Always

1 MΩ or higher

2A-46 (P-AB) - Body ground or other terminals

Always

1 MΩ or higher

2A-51 (P-AB) - Body ground or other terminals

Always

1 MΩ or higher
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
NG

REPLACE INSTRUMENT PANEL WIRE

23.

CHECK CONNECTION OF CONNECTORS

(a) Turn the engine switch off.

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

CAUTION:

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

(c) Check that the connectors are properly connected to the airbag sensor assembly, radio receiver assembly and instrument panel junction block assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

24.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag sensor assembly, radio receiver assembly and instrument panel junction block assembly.

(b) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE INSTRUMENT PANEL WIRE
OK

25.

CHECK WIRE HARNESS

(a) Connect the connector to the instrument panel junction block assembly.

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Radio Receiver Assembly)

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

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - Body ground

Engine switch on (IG)

Below 1 V

J151-8 (AIR) - Body ground

Engine switch on (IG)

Below 1 V

(e) Turn the engine switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

Below 1 Ω

(i) Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J151-9 (ARON) - J151-8 (AIR)

Always

1 MΩ or higher

J151-9 (ARON) - Body ground

Always

1 MΩ or higher

J151-8 (AIR) - Body ground

Always

1 MΩ or higher
NG

GO TO STEP 29

OK

26.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

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

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Radio Receiver Assembly)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J151-19 (IG) - Body ground

Engine switch on (IG)

11 to 14 V

(d) Turn the engine switch off.

(e) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

NG

REPLACE WIRE HARNESS OR BATTERY
OK

27.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the radio receiver assembly.

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

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

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

(d) Check the passenger airbag ON/OFF indicator according to the conditions in the table below.

OK:

Terminal Connection

Condition

Specified Condition

J142-35 (PAON) - Body ground

Engine switch on (IG)

"ON" comes on

J142-34 (P-AB) - Body ground

Engine switch on (IG)

"OFF" comes on

(e) Turn the engine switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

NG

REPLACE RADIO RECEIVER ASSEMBLY

OK

28.

CHECK DTC

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

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

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

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

(d) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(e) Turn the engine switch off.

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

(g) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

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.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE AIRBAG SENSOR ASSEMBLY

29.

CHECK INSTRUMENT PANEL WIRE

(a) Disconnect the connector from the instrument panel junction block assembly.

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Radio Receiver Assembly

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

*b

Front view of wire harness connector

(to Airbag Sensor Assembly)

*c

Front view of wire harness connector

(to Radio Receiver Assembly)

-

-

(b) 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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-8 (PAON) - 2A-46 (P-AB)

Always

Below 1 Ω

(d) Disconnect the service wire from connector B.

(e) Using a service wire, connect terminals 9 (ARON) and 8 (AIR) of connector E.

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-29 (PAON) - 2A-51 (P-AB)

Always

Below 1 Ω

(g) Disconnect the service wire from connector E.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2A-8 (PAON) - Body ground or other terminals

Always

1 MΩ or higher

2A-29 (PAON) - Body ground or other terminals

Always

1 MΩ or higher

2A-46 (P-AB) - Body ground or other terminals

Always

1 MΩ or higher

2A-51 (P-AB) - Body ground or other terminals

Always

1 MΩ or higher
OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
NG

REPLACE INSTRUMENT PANEL WIRE
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