Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Power Window Switch Malfunction (B2312)

Toyota Corolla Cross (2022-2025) Service Manual / Vehicle Exterior / Window / Glass / Power Window Control System / Power Window Switch Malfunction (B2312)

DESCRIPTION

This DTC is stored when the ECU built into a multiplex network master switch assembly determine that the multiplex network master switch assembly is stuck.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2312

Power Window Switch Malfunction
  • Multiplex network master switch assembly stuck
  • Multiplex network master switch assembly held in same position for more than 20 seconds

Multiplex network master switch assembly

CAUTION / NOTICE / HINT

NOTICE:

The power window control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication system is functioning properly.

Click here

HINT:

If DTC B2312 is not output again after the DTC has been cleared, the DTC was stored due to the switch being held in the same position continuously.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Master Switch > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Master Switch > Trouble Codes
Result

Proceed to

B2312 is output

A

DTCs are not output

B
A

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

B

END (DTC WAS STORED DUE TO SWITCH BEING OPERATED FOR 20 SECONDS OR MORE)

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