Power Window Control (Diagnostic Codes & Circuit Tests): Overview Lexus ES XV40 facelift

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).

DTC B2311 is set if only of the ECUs for each power window regulator motor assembly malfunctions.

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.

HINT

1. Initialization is required only when the power window regulator motor is replaced. However, replacing the motor may cause the motor gear to be engaged in a different position. This can cause a difference to exist between the current door glass position and the position memorized in the ECU. In this case, the jam protection function may work improperly. Return the system to the pre-initialized condition and reinitialize the system.
2. To return the system to the pre-initialized condition: Disconnect the power window regulator motor connector during power window operation. This will return the motor to the pre-initialized condition. DTC No. DTC Detection Condition Trouble Area B2311 When either of the following is met: The power window regulator motor malfunctions When the ECU in a power widow regulator motor determines that the fully closed window position has deviated approximately 20 mm (0.79 in.) or more from the normal position Battery disconnection when the engine switch is on (IG) Power window regulator motor Incorrect installation of power window components Overheated power window regulator motor

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.

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.

Scheme 19

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 regulator motor assembly has not been initialized, DTC B2313 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.

HINT

1. Replacing the door glass or door glass run may cause a difference to exist between the current door glass position and the position memorized in the ECU. In this case, the jam protection function may work improperly. Return the system to the pre-initialized condition and reinitialize the system.
2. To return the system to the pre-initialized condition: Disconnect the power window regulator motor connector during power window operation. This will return the motor to the pre-initialized condition.

This circuit supplies to operate the power window master switch.

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1. CHECK WIRE HARNESS Disconnect the I5 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition I5-11 (B) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance Tester Connection Condition Specified Condition I5-12 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE FUSE, HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-396754-S30323287102011050900000) PROBLEM SYMPTOMS TABLE

This circuit supplies power to operate the power window regulator switch assembly (Front passenger side).

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1. INSPECT POWER WINDOW REGULATOR SWITCH Disconnect the H6 connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 2 (U) - 4 (A) - 5 (E) Auto UP Below 1 ohms 2 (U) - 5 (E) Manual UP Below 1 ohms 5 (E) - 10 (D) Manual DOWN Below 1 ohms 4 (A) - 10 (D) - 5 (E) Auto DOWN Below 1 ohms NG --> REPLACE POWER WINDOW REGULATOR SWITCH OK: Go to next step
2. REPLACE WIRE HARNESS (POWER WINDOW REGULATOR SWITCH - POWER WINDOW ECU) Disconnect the H5 and H6 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition H5-4 (AUTO) - H6-4 (A) Always Below 1 ohms H5-5 (LED) - H6-8 (LED) Always Below 1 ohms H5-7 (DWN1) - H6-10 (D) Always Below 1 ohms H5-10 (UP1) - H6-2 (U) Always Below 1 ohms H5-4 (AUTO) - Body ground Always 10 kohms or higher H5-5 (LED) - Body ground Always 10 kohms or higher H5-7 (DWN1) - Body ground Always 10 kohms or higher H5-10 (UP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> END

This circuit supplies power to operate the power window regulator switch assembly (Rear LH).

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Scheme 27

1. INSPECT POWER WINDOW REGULATOR SWITCH Disconnect the K4 connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 2 (U) - 4 (A) - 5 (E) Auto UP Below 1 ohms 2 (U) - 5 (E) Manual UP Below 1 ohms 5 (E) - 10 (D) Manual DOWN Below 1 ohms 4 (A) - 10 (D) - 5 (E) Auto DOWN Below 1 ohms NG --> REPLACE POWER WINDOW REGULATOR SWITCH OK: Go to next step
2. CHECK WIRE HARNESS (POWER WINDOW REGULATOR SWITCH - POWER WINDOW ECU) Disconnect the K3 and K4 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition K3-4 (AUTO) - K4-4 (A) Always Below 1 ohms K3-5 (LED) - K4-8 (LED) Always Below 1 ohms K3-7 (DWN1) - K4-10 (D) Always Below 1 ohms K3-10 (UP1) - K4-2 (U) Always Below 1 ohms K3-4 (AUTO) - Body ground Always 10 kohms or higher K3-5 (LED) - Body ground Always 10 kohms or higher K3-7 (DWN1) - Body ground Always 10 kohms or higher K3-10 (UP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> END

This circuit supplies power to operate the power window regulator switch (Rear RH).

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Scheme 30

1. INSPECT POWER WINDOW REGULATOR SWITCH Disconnect the J4 connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 2 (U) - 4 (A) - 5 (E) Auto UP Below 1 ohms 2 (U) - 5 (E) Manual UP Below 1 ohms 5 (E) - 10 (D) Manual DOWN Below 1 ohms 4 (A) - 10 (D) - 5 (E) Auto DOWN Below 1 ohms NG --> REPLACE POWER WINDOW REGULATOR SWITCH OK: Go to next step
2. CHECK WIRE HARNESS (POWER WINDOW REGULATOR SWITCH - POWER WINDOW ECU) Disconnect the J3 and J4 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition J3-4 (AUTO) - J4-4 (A) Always Below 1 ohms J3-5 (LED) - J4-8 (LED) Always Below 1 ohms J3-7 (DWN1) - J4-10 (D) Always Below 1 ohms J3-10 (UP1) - J4-2 (U) Always Below 1 ohms J3-4 (AUTO) - Body ground Always 10 kohms or higher J3-5 (LED) - Body ground Always 10 kohms or higher J3-7 (DWN1) - Body ground Always 10 kohms or higher J3-10 (UP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> END

This circuit supplies to operate the power window ECU (Driver side, Front passenger side, Rear LH and Rear RH).

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Scheme 32

1. CHECK WIRE HARNESS (POWER WINDOW ECU - BATTERY AND BODY GROUND) Disconnect the power window ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition 2 (B) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance Tester Connection Condition Specified Condition 1 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE FUSE, HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-396754-S30323287102011050900000) PROBLEM SYMPTOMS TABLE