B2312

WINDSHIELD / WINDOWGLASS: POWER WINDOW CONTROL SYSTEM: B2312: Driver Side Door Master Switch Malfunction
B2312 - Driver Side Door Master Switch Malfunction

DESCRIPTION

The driver door power window regulator motor is driven by operating the power window regulator master switch. The driver door power window regulator motor has motor, regulator, and ECU functions.

When the ECU determines that the power window regulator master switch is stuck, DTC B2312 is set.

NOTICE:
- The power window control system uses a multiplex communication system (LIN). 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.
- When the power window regulator motor assembly (on the driver side) is reinstalled or replaced, the power window control system must be initialized.
- After a door glass or a door glass run has been replaced, the jam protection function may operate unexpectedly when the AUTO UP function is used. In such cases, the AUTO UP function can be resumed by repeating the following operation at least 5 times:
(1) Close the power window by fully pulling up the power window switch and holding it in the AUTO UP position.
(2) Open the power window by fully pushing down the switch.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (MASTER SWITCH)

(a) Using the Data List to check the function of the power window master switch.

D-Door Motor





OK:

ON (switch operates) appears on screen.

HINT
When the power window operates normally, the problem has been caused by irregular switch operation (for example, the power window regulator master switch was held in the same position for more than 20 seconds).

OK -- REPLACE POWER WINDOW REGULATOR MOTOR (for Driver Side)
NG -- Continue to next step.

2. CHECK WIRE HARNESS (SWITCH INPUT POWER SUPPLY)





(a) Disconnect the H2 switch connector.

(b) Measure the voltage of the wire harness and connector.

Standard voltage:





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

3. CHECK WIRE HARNESS (MASTER SWITCH - REGULATOR MOTOR)

(a) Disconnect the H2 switch connector.





(b) Disconnect the H4 motor connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

4. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

(a) Temporarily replace the power window regulator master switch with a new or normally functioning one.

(b) Check for DTC.

OK:

DTC is not output.

NG -- REPLACE POWER WINDOW REGULATOR MOTOR (for Driver Side)

OK -- END