B2312

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

DTC B2312 - Driver Side Door Master Switch Malfunction

DESCRIPTION

The portion of the power window control system that is located in the driver door consists of a power window master switch, regulator, and a motor with an integrated ECU. The driver door power window regulator motor is controlled by the ECU when the power window master switch is operated (models with jam protection).
When the ECU determines that the power window master switch is stuck, DTC B2312 is set.
NOTE: 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

PROCEDURE

1. CHECK DTC OUTPUT
(a) Turn the ignition switch off.
(b) Wait for at least 10 seconds, and then turn the ignition switch on (IG).
(c) Check whether the DTC output recurs.
Result:






B -- END (DUE TO KEEPING SWITCH OPERATED FOR 20 SECONDS OR MORE)
A -- Continue to next step.
2. INSPECT POWER WINDOW MASTER SWITCH




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






NG -- REPLACE POWER WINDOW MASTER SWITCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - WINDOW REGULATOR MOTOR)




(a) Disconnect the M1 and H1 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side)