Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000289WB
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM (for TMMMS Made): B00C286; Passenger Seat Occupant Classification Sensor "C" Signal (some circuit quantity, reported via serial data) Invalid; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

DTC

B00C286

Passenger Seat Occupant Classification Sensor "C" Signal (some circuit quantity, reported via serial data) Invalid

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B00C286

Passenger Seat Occupant Classification Sensor "C" Signal (some circuit quantity, reported via serial data) Invalid

Either of following conditions is met:

  • The airbag sensor assembly detects a line short, short to ground or +B in the rear occupant classification sensor LH circuit.
  • Rear occupant classification sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Harness or connector
  • Separate type front seat cushion spring assembly RH (rear occupant classification sensor LH)
  • Airbag sensor assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

    HINT:

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

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

  • After replacing the airbag sensor assembly or separate type front seat cushion spring assembly RH, refer to work procedure.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - 03/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 - 08/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE

HINT:

  • If it is difficult to perform troubleshooting (wire harness inspection), remove the front passenger seat installation bolts to see under the seat cushion.
  • In the above case, lift and hold the seat so that it does not fall down. Hold the seat only as necessary because holding the seat for a long period of time may cause seat rail deformation.

PROCEDURE

1.

CHECK DTC

(a) Check the DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Proceed to

B00C086 is output

A

B00C286 is output

B

B00C086 and B00C286 are output

C

B00C086 and B00C286 are not output

D

HINT:

Codes other than DTCs B00C086 and B00C286 may be output at this time, but they are not related to this check.

B

GO TO STEP 5

C

GO TO STEP 8

D

USE SIMULATION METHOD TO CHECK

A

2.

CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

(c) Check that the connectors are properly connected to the airbag sensor assembly and separate type front seat cushion spring assembly RH (front occupant classification sensor LH).

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

3.

CHECK CONNECTORS

(a) Disconnect the airbag sensor assembly connector.

*1

Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH)

*2

Airbag Sensor Assembly

*3

Wire Harness

(b) Disconnect the separate type front seat cushion spring assembly RH (front occupant classification sensor LH) connector.

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

OK:

The terminals are not deformed or damaged.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O17-32 (SIG) - j6-2 (SIG)

Always

Below 1 Ω

*1

Separate Type Front Seat Cushion Spring Assembly RH

*2

Airbag Sensor Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))
OK

REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

(c) Check that the connectors are properly connected to the airbag sensor assembly and separate type front seat cushion spring assembly RH (rear occupant classification sensor LH).

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

6.

CHECK CONNECTORS

(a) Disconnect the airbag sensor assembly connector.

*1

Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH)

*2

Airbag Sensor Assembly

*3

Wire Harness

(b) Disconnect the separate type front seat cushion spring assembly RH (rear occupant classification sensor LH) connector.

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

OK:

The terminals are not deformed or damaged.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O17-32 (SIG) - j7-2 (SIG)

Always

Below 1 Ω

*1

Separate Type Front Seat Cushion Spring Assembly RH

*2

Airbag Sensor Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH))
OK

REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

(c) Check that the connectors are properly connected to the airbag sensor assembly and separate type front seat cushion spring assembly RH.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

9.

CHECK CONNECTORS

(a) Disconnect the airbag sensor assembly connector.

*1

Separate Type Front Seat Cushion Spring Assembly RH

*2

Airbag Sensor Assembly

*3

Wire Harness

(b) Disconnect the separate type front seat cushion spring assembly RH connector.

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

OK:

The terminals are not deformed or damaged.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

10.

CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O17-32 (SIG) - j6-2 (SIG)

Always

Below 1 Ω

O17-32 (SIG) - j7-2 (SIG)

Always

Below 1 Ω

*1

Separate Type Front Seat Cushion Spring Assembly RH

*2

Airbag Sensor Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))

*c

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH))
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O17-32 (SIG) - Other terminals and body ground

Always

10 kΩ or higher

j6-2 (SIG) - Other terminals and body ground

Always

10 kΩ or higher

j7-2 (SIG) - Other terminals and body ground

Always

10 kΩ or higher

*1

Separate Type Front Seat Cushion Spring Assembly RH

*2

Airbag Sensor Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))

*c

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH))
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY RH)

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

*1

Separate Type Front Seat Cushion Spring Assembly RH

*2

Airbag Sensor Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Front Occupant Classification Sensor LH))

*c

Front view of wire harness connector

(to Separate Type Front Seat Cushion Spring Assembly RH (Rear Occupant Classification Sensor LH))

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O17-32 (SIG) - Body ground

Ignition switch ON

Below 1 V

j6-2 (SIG) - Body ground

Ignition switch ON

Below 1 V

j7-2 (SIG) - Body ground

Ignition switch ON

Below 1 V
OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR