Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Passenger Seat Belt Sensor Circuit Short to Battery (B005212)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Passenger Seat Belt Sensor Circuit Short to Battery (B005212)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B005212

Passenger Seat Belt Sensor Circuit Short to Battery

One of the following conditions is met:

  • The airbag ECU assembly detects a short to B+ in the passenger seat belt sensor circuit for 2 seconds.
  • Passenger seat buckle switch malfunction
  • Airbag ECU assembly malfunction
  • Harness or connector
  • Passenger seat buckle switch (front seat inner belt assembly RH)
  • Airbag ECU assembly

Comes on

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

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Diagnosis Condition

Ignition switch ON

○

○

○

Malfunction Status

The airbag ECU assembly detects a short to B+ in the passenger seat belt sensor circuit

○

-

-

Passenger seat buckle switch malfunction

-

○

-

Airbag ECU assembly malfunction

-

-

○

Detection Time

2 seconds

2 seconds

2 seconds

Number of Trips

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 passenger seat buckle switch (front seat inner belt assembly RH).

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

2.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag ECU assembly and passenger seat buckle switch (front seat inner belt assembly RH).

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

OK:

The terminals are not deformed or damaged.

*1

Passenger Seat Buckle Switch (Front Seat Inner Belt Assembly RH)

*2

Airbag ECU Assembly

*3

Wire Harness
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

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

j15-1 - Body ground

Ignition switch ON

Below 1 V

j15-2 - Body ground

Ignition switch ON

Below 1 V

Result:

Proceed to

OK

NG

*1

Passenger Seat Buckle Switch (Front Seat Inner Belt Assembly RH)

*2

Airbag ECU Assembly

*3

Wire Harness

*a

Front view of wire harness connector

(to Passenger Seat Buckle Switch (Front Seat Inner Belt Assembly RH))

(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

4.

CLEAR DTC

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

*1

Passenger Seat Buckle Switch (Front Seat Inner Belt Assembly RH)

*2

Airbag ECU Assembly

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

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

(d) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(e) Turn the ignition switch off.

NEXT

5.

CHECK DTC

(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

B005212 is output

A

B005212 is not output

B

HINT:

Codes other than DTC B005212 may be output at this time, but they are not related to this check.

A

REPLACE AIRBAG ECU ASSEMBLY

B

REPLACE PASSENGER SEAT BUCKLE SWITCH (FRONT SEAT INNER BELT ASSEMBLY RH)

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