B2312

WINDSHIELD / WINDOWGLASS: POWER WINDOW CONTROL SYSTEM: B2312: Power Window Switch Malfunction
B2312 - Power Window Switch Malfunction

DESCRIPTION

The power window control system that is located in each door consists of a power window master switch, power window switches, regulators, and motors with an integrated ECU. A power window regulator motor is controlled by the ECU when the power window switch is operated (models with jam protection).

When only of the ECUs determines that the power window switch is stuck, DTC B2312 is set.

NOTICE:
The power window control system uses a serial communication protocol (LIN) to communicate with the main body ECU. 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.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT
This code will be set if any of the power window switches is stuck or if there is a problem with any of the wires which connect to the power window master switch, each power window ECU, and each power window switch.

PROCEDURE

1. CHECK WIRE HARNESS (LIN COMMUNICATION)

(a) Disconnect the power window regulator master switch and power window ECU connectors.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT POWER WINDOW SWITCH

(a) Disconnect the power window switch connectors.

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

Standard resistance:

Front passenger and rear power window switch

NG -- REPLACE POWER WINDOW SWITCH
OK -- Continue to next step.

3. CHECK WIRE HARNESS (POWER WINDOW (MASTER ) SWITCH - POWER WINDOW ECU)

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

Standard resistance:

Driver side
Front passenger side
Rear LH side
Rear RH side

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- END