Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Left Frontal Restraints Sensor Missing Message (B009087)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Left Frontal Restraints Sensor Missing Message (B009087)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B009087

Left Frontal Restraints Sensor Missing Message

One of the following conditions is met:

  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds.
  • Front airbag sensor LH malfunction
  • Airbag ECU assembly malfunction
  • Harness or connector
  • Front airbag sensor LH
  • Airbag ECU assembly

Comes on

Does not apply to test/check mode
DTC Detection Conditions:
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Pattern 5

Pattern 6

Diagnosis Condition

Ignition switch ON

○

○

○

○

○

○

Malfunction Status

The airbag ECU assembly detects a line short circuit signal in the front airbag sensor LH circuit.

○

-

-

-

-

-

The airbag ECU assembly detects an open circuit signal in the front airbag sensor LH circuit.

-

○

-

-

-

-

The airbag ECU assembly detects a short circuit to ground signal in the front airbag sensor LH circuit.

-

-

○

-

-

-

The airbag ECU assembly detects a short circuit to B+ signal in the front airbag sensor LH circuit.

-

-

-

○

-

-

Front airbag sensor LH malfunction

-

-

-

-

○

-

Airbag ECU assembly malfunction

-

-

-

-

-

○

Detection Time

2 seconds

2 seconds

2 seconds

2 seconds

2 seconds

2 seconds

Number of Trips

1 trip

1 trip

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

Click here

HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click here

PROCEDURE

1.

CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

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

CAUTION:

Wait at least 60 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 ECU assembly and front airbag sensor LH.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

2.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag ECU assembly and front airbag sensor LH.

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

OK:

The terminals of the connectors are not deformed or damaged.

*1

Front Airbag Sensor LH

*2

Airbag ECU Assembly

*3

Wire Harness
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (SHORT)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A175-2 (+SL) - A175-1 (-SL)

Always

1 MΩ or higher

*1

Front Airbag Sensor LH

*2

Airbag ECU Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Front Airbag Sensor LH)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (SHORT TO GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A175-2 (+SL) - Body ground

Always

1 MΩ or higher

A175-1 (-SL) - Body ground

Always

1 MΩ or higher

*1

Front Airbag Sensor LH

*2

Airbag ECU Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Front Airbag Sensor LH)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (SHORT TO B+)

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

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A175-2 (+SL) - Body ground

Ignition switch ON

Below 1 V

A175-1 (-SL) - Body ground

Ignition switch ON

Below 1 V

Result:

Proceed to

OK

NG

*1

Front Airbag Sensor LH

*2

Airbag ECU Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Front Airbag Sensor LH)

(d) Turn the ignition switch off.

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

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK HARNESS AND CONNECTOR (OPEN)

(a) Using a service wire, connect terminals 30 (+SL) and 31 (-SL) of connector B.

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A175-2 (+SL) - A175-1 (-SL)

Always

Below 1 Ω

Result:

Proceed to

OK

NG

*1

Front Airbag Sensor LH

*2

Airbag ECU Assembly

*3

Wire Harness

*4

Service Wire

*a

Front view of wire harness connector

(to Front Airbag Sensor LH)

*b

Front view of wire harness connector

(to Airbag ECU Assembly)

(c) Disconnect the service wire from connector B.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CLEAR DTC

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

*1

Front Airbag Sensor RH

*2

Airbag ECU Assembly

(b) Interchange the front airbag sensor LH with RH and connect the connectors.

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

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

(e) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(f) Turn the ignition switch off.

NEXT

8.

CHECK FRONT AIRBAG SENSOR LH

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

(b) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Proceed to

B009087 is output

A

B009587 is output

B

B009087 and B009587 are not output

C

HINT:

Codes other than DTCs B009087 and B009587 may be output at this time, but they are not related to this check.

(c) Turn the ignition switch off.

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

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(e) Return the front airbag sensor LH and RH to their original positions and connect the connectors.

A

REPLACE AIRBAG ECU ASSEMBLY

B

REPLACE FRONT AIRBAG SENSOR LH

C

USE SIMULATION METHOD TO CHECK

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