Power Window Control System (Diagnostics & Symptom Tests): Overview

SYSTEM DESCRIPTION

POWER WINDOW CONTROL SYSTEM DESCRIPTION The power window control system controls the power window UP and DOWN function using the regulator motors. The main controls of this system are: the power window master switch which is built into the driver side door, and the power window switches which are built into the front passenger side door and rear doors. Pressing the switch or any of the switches on the master switch transmits an UP or DOWN signal to the corresponding power window regulator motor.
FUNCTION OF MAIN COMPONENTS Component Outline Power Window Master Switch Controls window operations for all windows When window lock switch is set to lock position, window operation is only possible with master switch Power Window Switch Located on passenger side door and rear doors Each regulator switch controls window operations for its respective window Power Window Regulator Motor Assembly Receives switch signals and changes signals into motor activation to change window position Main Body ECU (Instrument Panel Junction Block) Main body ECU (instrument panel junction block) controls the PWR relay (operation)
SYSTEM FUNCTION The power window control system has the following functions. Function Outline Manual UP and DOWN function Driver side power window: Function that raises window while power window switch is pulled up, and lowers window while pushed halfway down (window stops as soon as switch is released) Other power windows: Function that raises window while power window switch is pulled up, and lowers window while pushed down (window stops as soon as switch is released) AUTO DOWN function Function that enables window of driver side door to be fully opened by one full push downward on power window switch Remote UP and DOWN function Function that allows power window master switch to control manual UP and DOWN operation of passenger side power window and rear power windows Window lock function Function where passenger side power window and rear power window operation is disabled when window lock switch of master switch is pressed Passenger side power window and rear power windows can be operated when window lock switch is pressed again Key-off operation function Function that makes it possible to operate power window for approximately 45 seconds after the ignition switch is turned from ON to off, if either front door is not opened.

DESCRIPTION

With the ignition switch ON, the power window master switch transmits remote switch signals to the switches of the front passenger door power window and rear door power windows. Then, each regulator switch drives its respective power window regulator motor.

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Scheme 62: WIRING DIAGRAM

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CHECK POWER WINDOW MASTER SWITCH Turn the window lock switch OFF and operate the switches on the master switch. Check that the remote UP and DOWN function operates normally. OK Remote UP and DOWN function operates normally. NG --> See step 2 OK --> END
CHECK MANUAL UP / DOWN FUNCTION Check that the passenger door power window and rear door power window manual UP and DOWN function operates normally. OK Manual UP and DOWN function operates normally. NG --> See step 3 OK --> See step 7
CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - BATTERY) Disconnect the power window master switch connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition I3-6 (B) - Body ground Ignition switch ON 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW MASTER SWITCH Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 6 (B) - 16 (U) 15 (D) - 1 (E) UP (Passenger side) Below 1 ohms 6 (B) - 15 (D) 16 (U) - 1 (E) DOWN (Passenger side) Below 1 ohms 6 (B) - 12 (U) 13 (D) - 1 (E) UP (Rear LH) Below 1 ohms 6 (B) - 13 (D) 12 (U) - 1 (E) DOWN (Rear LH) Below 1 ohms 6 (B) - 10 (U) 18 (D) - 1 (E) UP (Rear RH) Below 1 ohms 6 (B) - 18 (D) 10 (U) - 1 (E) DOWN (Rear RH) Below 1 ohms NG --> See step 7 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASTER SWITCH - FRONT PASSENGER, REAR LH/RH SWITCH) Front passenger side: Disconnect the power window switch (passenger side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-16 (U) - H7-5 (SU) Always Below 1 ohms I3-15 (D) - H7-2 (SD) Always Below 1 ohms I3-16 (U) - Body ground Always 10 kohms or higher I3-15 (D) - Body ground Always 10 kohms or higher Rear LH side: Disconnect the power window switch (rear LH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-12 (U) - K1-5 (SU) Always Below 1 ohms I3-13 (D) - K1-2 (SD) Always Below 1 ohms I3-12 (U) - Body ground Always 10 kohms or higher I3-13 (D) - Body ground Always 10 kohms or higher Rear RH side: Disconnect the power window switch (rear RH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-10 (U) - J1-5 (SU) Always Below 1 ohms I3-18 (D) - J1-2 (SD) Always Below 1 ohms I3-10 (U) - Body ground Always 10 kohms or higher I3-18 (D) - Body ground Always 10 kohms or higher Result Result Proceed to NG A OK (Front passenger side) B OK (Rear LH side) C OK (Rear RH side) D D --> See step 9 C --> See step 8 B --> See step 6 A --> REPAIR OR REPLACE HARNESS OR CONNECTOR
REPLACE POWER WINDOW SWITCH (FRONT PASSENGER SIDE). Refer to «REMOVAL»(ref-426155-S22042877302011101200000)
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)
REPLACE POWER WINDOW SWITCH (REAR LH SIDE). Refer to «REMOVAL»(ref-426155-S14585184242011101200000)
REPLACE POWER WINDOW SWITCH (REAR RH SIDE). Refer to «REMOVAL»(ref-426155-S14585184242011101200000)

If the manual UP or DOWN and AUTO DOWN functions do not operate, a malfunction may exist in the power window master switch, power window regulator motor or wire harness.

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Scheme 68: WIRING DIAGRAM

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Scheme 69: PROCEDURE

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INSPECT POWER WINDOW MASTER SWITCH (DRIVER SWITCH) Remove the power window master switch. Refer to «REMOVAL»(ref-426155-S01328292802011101200000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 (E) - 4 (D) 3 (U) - 6 (B) UP Below 1 ohms 1 (E) - 3 (U) 1 (E) - 4 (D) OFF Below 1 ohms 1 (E) - 3 (U) 6 (B) - 4 (D) DOWN Below 1 ohms 1 (E) - 3 (U) 6 (B) - 4 (D) AUTO DOWN Below 1 ohms NG --> See step 5 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASTER SWITCH - MOTOR (DRIVER SIDE)) Disconnect the power window regulator motor assembly (driver side) motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-4 (D) - I7-1 (D) Always Below 1 ohms I3-3 (U) - I7-2 (U) Always Below 1 ohms I3-4 (D) - Body ground Always 10 kohms or higher I3-3 (U) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER SIDE) Remove the power window regulator motor assembly. Refer to «REMOVAL»(ref-426155-S19777924852011101200000) . Check power window regulator motor operation: Apply battery voltage to connector terminals 1 and 2. NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2. Check that the motor gear rotates smoothly as follows. OK Measurement Condition Specified Condition Battery positive (+) --> 1 (D) Battery negative (-) --> 2 (U) Motor gear rotates counterclockwise Battery positive (+) --> 2 (U) Battery negative (-) --> 1 (D) Motor gear rotates clockwise Check PTC operation: NOTE: This check must be performed with the power window regulator and door glass installed on the vehicle. Install the power window regulator motor. Refer to «INSTALLATION»(ref-426155-S37552420082011101200000) . Connect an electrical tester DC 400 A probe to the wire harness of terminal 2. NOTE: Match the arrow mark of the probe with the direction of the current flow. Fully close the door glass by pulling up the power window switch. Wait for approximately 60 seconds. Continue to pull up the power window switch and measure how long it takes for the electrical current to change from a range of 16 to 28 A to approximately 1 A (current shut-off inspection). Standard 4 to 90 seconds Wait for 60 seconds after the previous step, and then push down press the power window switch (driver side). OK The driver side window goes down. NG --> See step 6 OK --> See step 4
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER SIDE). Refer to «REMOVAL»(ref-426155-S19777924852011101200000)

If the passenger side manual UP or DOWN function does not operate, a malfunction may exist in the power window regulator motor, power window switch, power window master switch or wire harness.

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Scheme 73: WIRING DIAGRAM

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Scheme 74: PROCEDURE

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CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the power window switch (front passenger side) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition H7-3 (B) - Body ground Ignition switch ON 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW SWITCH (FRONT PASSENGER SIDE) Remove the power window switch. Refer to «REMOVAL»(ref-426155-S22042877302011101200000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 3 (B) - 4 (U) 2 (SD) - 1 (D) UP Below 1 ohms 5 (SU) - 4 (U) 2 (SD) - 1 (D) OFF Below 1 ohms 5 (SU) - 4 (U) 3 (B) - 1 (D) DOWN Below 1 ohms NG --> See step 6 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SWITCH (PASSENGER SIDE) - MOTOR (PASSENGER SIDE)) Disconnect the power window regulator motor assembly (front passenger side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H7-1 (D) - H8-1 (D) Always Below 1 ohms H7-4 (U) - H8-2 (U) Always Below 1 ohms H7-1 (D) - Body ground Always 10 kohms or higher H7-4 (U) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER SIDE) Remove the power window regulator motor assembly. Refer to «REMOVAL»(ref-426155-S19777924852011101200000) . Check power window regulator motor operation: Apply battery voltage to connector terminals 1 and 2. NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2. Check that the motor gear rotates smoothly as follows. OK Measurement Condition Specified Condition Battery positive (+) --> 1 (D) Battery negative (-) --> 2 (U) Motor gear rotates clockwise Battery positive (+) --> 2 (U) Battery negative (-) --> 1 (D) Motor gear rotates counterclockwise Check PTC operation: NOTE: This check must be performed with the power window regulator and door glass installed on the vehicle. Install the power window regulator motor. Refer to «INSTALLATION»(ref-426155-S37552420082011101200000) . Connect an electrical tester DC 400 A probe to the wire harness of terminal 2. NOTE: Match the arrow mark of the probe with the direction of the current flow. Fully close the door glass by pulling up the power window switch. Wait for approximately 60 seconds. Continue to pull up the power window switch and measure how long it takes for the electrical current to change from a range of 16 to 28 A to approximately 1 A (current shut-off inspection). Standard 4 to 90 seconds Wait for 60 seconds after the previous step, and then push down the power window switch (passenger side). OK The passenger side window goes down. NG --> See step 7 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASTER SWITCH - SWITCH (FRONT PASSENGER SIDE)) Disconnect the power window master switch connector. Disconnect the power window switch (front passenger side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-16 (U) - H7-5 (SU) Always Below 1 ohms I3-15 (D) - H7-2 (SD) Always Below 1 ohms I3-16 (U) - Body ground Always 10 kohms or higher I3-15 (D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
REPLACE POWER WINDOW SWITCH (FRONT PASSENGER SIDE). Refer to «REMOVAL»(ref-426155-S22042877302011101200000)
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER SIDE). Refer to «REMOVAL»(ref-426155-S19777924852011101200000)
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)

If the rear LH side manual UP or DOWN function does not operate, a malfunction may exist in the power window regulator motor, power window switch, power window master switch or wire harness.

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Scheme 79: WIRING DIAGRAM

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Scheme 80: PROCEDURE

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CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the power window switch (rear LH side) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition K1-3 (B) - Body ground Ignition switch ON 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW SWITCH (REAR LH SIDE) Remove the power window switch. Refer to «REMOVAL»(ref-426155-S14585184242011101200000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 (D) - 2 (SD) 3 (B) - 4 (U) UP Below 1 ohms 4 (U) - 5 (SU) 1 (D) - 2 (SD) OFF Below 1 ohms 2 (SD) - 3 (B) 4 (U) - 5 (SU) DOWN Below 1 ohms NG --> See step 6 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SWITCH (REAR LH SIDE) - MOTOR (REAR LH SIDE)) Disconnect the power window regulator motor assembly (rear LH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K1-4 (U) - K2-1 (U) Always Below 1 ohms K1-1 (D) - K2-2 (D) Always Below 1 ohms K1-4 (U) - Body ground Always 10 kohms or higher K1-1 (D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH SIDE) Remove the power window regulator motor assembly. Refer to «REMOVAL»(ref-426155-S29020372372011101200000) . Check power window regulator motor operation: Apply battery voltage to connector terminals 1 and 2. NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2. Check that the motor gear rotates smoothly as follows. OK Measurement Condition Specified Condition Battery positive (+) --> 1 (U) Battery negative (-) --> 2 (D) Motor gear rotates clockwise Battery positive (+) --> 2 (D) Battery negative (-) --> 1 (U) Motor gear rotates counterclockwise Check PTC operation: NOTE: This check must be performed with the power window regulator and door glass installed on the vehicle. Install the power window regulator motor. Refer to «INSTALLATION»(ref-426155-S42303809852011101200000) . Connect an electrical tester DC 400 A probe to the wire harness of terminal 1. NOTE: Match the arrow mark of the probe with the direction of the current flow. Fully close the door glass by pulling up the power window switch. Wait for approximately 60 seconds. Continue to pull up the power window switch and measure how long it takes for the electrical current to change from a range of 16 to 28 A to approximately 1 A (current shut-off inspection). Standard 4 to 90 seconds Wait for 60 seconds after the previous step, and then push down the power window switch (rear LH side). OK The rear LH side window goes down. NG --> See step 7 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASTER SWITCH - SWITCH (REAR LH SIDE)) Disconnect the power window master switch connector. Disconnect the power window switch (rear LH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-12 (U) - K1-5 (SU) Always Below 1 ohms I3-13 (D) - K1-2 (SD) Always Below 1 ohms I3-12 (U) - Body ground Always 10 kohms or higher I3-13 (D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
REPLACE POWER WINDOW SWITCH (REAR LH SIDE). Refer to «REMOVAL»(ref-426155-S14585184242011101200000)
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH). Refer to «REMOVAL»(ref-426155-S29020372372011101200000)
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)

If the rear RH side manual UP or DOWN function does not operate, a malfunction may exist in the power window regulator motor, power window switch, power window master switch or wire harness.

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Scheme 85: WIRING DIAGRAM

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Scheme 86: PROCEDURE

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CHECK HARNESS AND CONNECTOR (POWER SOURCE) Disconnect the power window switch (rear RH side) connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition J1-3 (B) - Body ground Ignition switch ON 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW SWITCH (REAR RH SIDE) Remove the power window switch. Refer to «REMOVAL»(ref-426155-S14585184242011101200000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 (D) - 2 (SD) 3 (B) - 4 (U) UP Below 1 ohms 1 (D) - 2 (SD) 4 (U) - 5 (SU) OFF Below 1 ohms 2 (SD) - 3 (B) 4 (U) - 5 (SU) DOWN Below 1 ohms NG --> See step 6 OK: Go to next step
CHECK HARNESS AND CONNECTOR (SWITCH (REAR RH SIDE) - MOTOR (REAR RH SIDE)) Disconnect the power window regulator motor assembly (rear RH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition J1-4 (U) - J2-1 (U) Always Below 1 ohms J1-1 (D) - J2-2 (D) Always Below 1 ohms J1-4 (U) - Body ground Always 10 kohms or higher J1-1 (D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH SIDE) Remove the power window regulator motor assembly. Refer to «REMOVAL»(ref-426155-S29020372372011101200000) . Check power window regulator motor operation: Apply battery voltage to connector terminals 1 and 2. NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2. Check that the motor gear rotates smoothly as follows. OK Measurement Condition Specified Condition Battery positive (+) --> 1 (U) Battery negative (-) --> 2 (D) Motor gear rotates counterclockwise Battery positive (+) --> 2 (D) Battery negative (-) --> 1 (U) Motor gear rotates clockwise Check PTC operation: NOTE: This check must be performed with the power window regulator and door glass installed on the vehicle. Install the power window regulator motor. Refer to «INSTALLATION»(ref-426155-S42303809852011101200000) . Connect an electrical tester DC 400 A probe to the wire harness of terminal 1. NOTE: Match the arrow mark of the probe with the direction of the current flow. Fully close the door glass by pulling up the power window switch. Wait for approximately 60 seconds. Continue to pull up the power window switch and measure how long it takes for the electrical current to change from a range of 16 to 28 A to approximately 1 A (current shut-off inspection). Standard 4 to 90 seconds Wait for 60 seconds after the previous step, and then push down the power window switch (rear RH side). OK The rear RH side window goes down. NG --> See step 7 OK: Go to next step
CHECK HARNESS AND CONNECTOR (MASTER SWITCH - SWITCH (REAR RH SIDE)) Disconnect the power window master switch connector. Disconnect the power window switch (rear RH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-10 (U) - J1-5 (SU) Always Below 1 ohms I3-18 (D) - J1-2 (SD) Always Below 1 ohms I3-10 (U) - Body ground Always 10 kohms or higher I3-18 (D) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
REPLACE POWER WINDOW SWITCH (REAR RH SIDE). Refer to «REMOVAL»(ref-426155-S14585184242011101200000)
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH). Refer to «REMOVAL»(ref-426155-S29020372372011101200000)
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)

If none of the power windows operate, a malfunction may exist in the power window master switch, main body ECU (instrument panel junction block) or wire harness.

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Scheme 91: WIRING DIAGRAM

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CHECK HARNESS AND CONNECTOR (POWER WINDOW POWER SOURCE) Disconnect the power window master switch connector. Measure the voltage according to the value(s) table below. Standard Voltage Tester Connection Switch Condition Specified Condition I3-6 (B) - Body ground Ignition switch ON 11 to 14 V NG --> See step 3 OK: Go to next step
CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I3-1 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 4
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND) Disconnect the instrument panel junction block connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2E-17 (PWS) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
REPLACE POWER WINDOW MASTER SWITCH. Refer to «REMOVAL»(ref-426155-S01328292802011101200000)

When the driver door has not been opened and closed, each door power window regulator motor can control its power window operation for approximately 45 seconds after the ignition switch is turned from ON to off (the key is removed) by receiving operation permission signals from the main body ECU. However, when approximately 45 seconds have elapsed, or the driver door or front passenger side door is opened within approximately 45 seconds of the ignition switch being turned off (the key is removed), the power window regulator motor stops operating.

Power Window Control System (Diagnostics & Symptom Tests): Overview Toyota Corolla X facelift