DTC B2312 Driver Side Door Master Switch Malfunction |
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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:
- Close the power window by fully pulling up the power window switch and holding it in the AUTO UP position.
- Open the power window by fully pushing down the switch.
DTC No. | DTC Detection Condition | Trouble Area |
B2312 | Power window regulator master switch stuck |
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WIRING DIAGRAM
INSPECTION PROCEDURE
1.READ VALUE USING INTELLIGENT TESTER (MASTER SWITCH) |
Using the Data List to check the function of the power window master switch.
Power window regulator master switch Item Measurement Item / Display (Range) Normal Condition Diagnostic Note D P/W Auto SW Driver side power window
AUTO switch signal / ON or OFFON: Driver side power window AUTO switch operates
OFF: Driver side power window AUTO switch does not operate- D P/W Up SW Driver side power window
UP switch signal / ON or OFFON: Driver side power window UP switch operates
OFF: Driver side power window UP switch does not operate- D P/W Down SW Driver side power window
DOWN switch signal / ON or OFFON: Driver side power window DOWN switch operates
OFF: Driver side power window DOWN switch does not operate- - 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).
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NG | |
2.CHECK WIRE HARNESS (SWITCH INPUT POWER SUPPLY) |
Disconnect the H2*1 or G8*2 switch connector.
Turn the ignition switch on (IG).
Measure the voltage of the wire harness side connector.
- Standard voltage:
- for LHD:
Tester Connection Specified Condition H2-6 (B) - H2-1 (E) 10 to 14 V - for RHD:
Tester Connection Specified Condition G8-6 (B) - G8-9 (E) 10 to 14 V
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OK | |
3.CHECK WIRE HARNESS (MASTER SWITCH - REGULATOR MOTOR) |
Disconnect the H2*1 or G8*2 switch connector.
Disconnect the H4*1 or G9*2 motor connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
- for LHD:
Tester Connection Specified Condition H2-8 (U) - H4-10 (UP) Below 1 Ω H2-5 (D) - H4-7 (DOWN) Below 1 Ω H2-4 (A) - H4-4 (AUTO) Below 1 Ω H2-3 (LED) - H4-5 (LED) Below 1 Ω - for RHD:
Tester Connection Specified Condition G8-1 (U) - G9-10 (UP) Below 1 Ω G8-5 (D) - G9-7 (DOWN) Below 1 Ω G8-4 (A) - G9-4 (AUTO) Below 1 Ω G8-3 (LED) - G9-5 (LED) Below 1 Ω
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OK | |
4.REPLACE POWER WINDOW REGULATOR MASTER SWITCH |
Temporarily replace the power window regulator master switch with a new or normally functioning one.
Check for DTC.
- OK:
- DTC is not output.
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OK | ||
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