Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026YPJ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM (for TMC Made): B2312; Power Window Switch Malfunction; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

DTC

B2312

Power Window Switch Malfunction

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

DTC Output from

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

Master Switch

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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM (for TMC Made): HOW TO PROCEED WITH TROUBLESHOOTING

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

B2312 is 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)