Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001X0EN
Model Year Start: 2022 Model: Corolla Prod Date Range: [06/2021 - 09/2022]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for HV Model): B1660; P Seat Airbag Active Mode Indicator; 2022 MY Corolla Corolla HV [06/2021 - 09/2022]

DTC

B1660

P Seat Airbag Active Mode Indicator

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and passenger airbag ON/OFF indicator (telltale light assembly).

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger airbag assembly.

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
  • Instrument panel wire
  • Passenger airbag ON/OFF indicator (Telltale light assembly)
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

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

PROCEDURE

1.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Turn the power 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 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for HV Model): OPERATION CHECK

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 7

A

2.

CHECK CONNECTION OF CONNECTORS

(a) Turn the power switch off.

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

CAUTION:

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

(c) Check that the connectors are properly connected to the airbag sensor assembly and telltale light assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

3.

CHECK CONNECTORS

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

4.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Connect the connector to the telltale light assembly.

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

(c) Turn the power 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 6

OK

5.

CHECK DTC

(a) Turn the power switch off.

*1

Telltale Light Assembly

*2

Airbag Sensor Assembly

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

CAUTION:

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

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

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

(e) Turn the power 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 power switch off.

(h) Turn the power 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

6.

CHECK WIRE HARNESS

(a) Turn the power switch off.

*1

Telltale Light Assembly

*2

Airbag Sensor Assembly

*3

Instrument Panel Wire

*4

Service Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Telltale Light Assembly)

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

CAUTION:

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

(c) Disconnect the connector from the telltale light assembly.

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

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I66-3 (PAON) - Body ground

Power switch on (IG)

Below 1 V

I66-2 (P-AB) - Body ground

Power switch on (IG)

Below 1 V

(g) Turn the power switch off.

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

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary 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

I66-3 (PAON) - I66-2 (P-AB)

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

I66-3 (PAON) - I66-2 (P-AB)

Always

1 MΩ or higher

I66-3 (PAON) - Body ground

Always

1 MΩ or higher

I66-2 (P-AB) - Body ground

Always

1 MΩ or higher
OK

REPLACE TELLTALE LIGHT ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

7.

CHECK CONNECTION OF CONNECTORS

(a) Turn the power switch off.

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

CAUTION:

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

(c) Check that the connectors are properly connected to the airbag sensor assembly and telltale light assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

8.

CHECK CONNECTORS

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

9.

CHECK WIRE HARNESS

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

*1

Telltale Light Assembly

*2

Airbag Sensor Assembly

*3

Instrument Panel Wire

*4

Service Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Telltale Light Assembly)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I66-3 (PAON) - Body ground

Power switch on (IG)

Below 1 V

I66-2 (P-AB) - Body ground

Power switch on (IG)

Below 1 V

(d) Turn the power switch off.

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

CAUTION:

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

(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 the wire.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I66-3 (PAON) - I66-2 (P-AB)

Always

Below 1 Ω

(h) Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I66-3 (PAON) - I66-2 (P-AB)

Always

1 MΩ or higher

I66-3 (PAON) - Body ground

Always

1 MΩ or higher

I66-2 (P-AB) - Body ground

Always

1 MΩ or higher
NG

REPLACE INSTRUMENT PANEL WIRE
OK

10.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

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

*1

Telltale Light Assembly

*2

Airbag Sensor Assembly

*3

Instrument Panel Wire

*a

Front view of wire harness connector

(to Telltale Light Assembly)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

I66-5 (IG+) - Body ground

Power switch on (IG)

11 to 14 V

(d) Turn the power switch off.

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

CAUTION:

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

NG

REPLACE WIRE HARNESS OR AUXILIARY BATTERY
OK

11.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the telltale light assembly.

*1

Telltale Light Assembly

*2

Airbag Sensor Assembly

*3

Instrument Panel Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

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

(c) Turn the power 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

I47-35 (PAON) - Body ground

Power switch on (IG)

"ON" comes on

I47-34 (P-AB) - Body ground

Power switch on (IG)

"OFF" comes on

(e) Turn the power switch off.

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

CAUTION:

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

NG

REPLACE TELLTALE LIGHT ASSEMBLY

OK

12.

CHECK DTC

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

*1

Telltale Light Assembly

*2

Airbag Sensor Assembly

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

(c) Turn the power 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 power switch off.

(f) Turn the power 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