Windshield/window Glass: Overview Scion xB II

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SYSTEM DESCRIPTION

1. POWER WINDOW CONTROL SYSTEM DESCRIPTION The power window control system controls the power window UP / DOWN function using the regulator motors. The main controls of this system are the power window regulator master switch, which is built into the driver side door, and the power window regulator switches, which are built into the passenger side door and rear doors. Pressing the regulator switch or any of the switches on the master switch transmits an UP / DOWN signal to the corresponding power window regulator motor.
2. FUNCTION OF MAIN COMPONENT FUNCTION OF MAIN COMPONENT Component Outline Power Window Regulator Master Switch Assembly 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 Regulator Switch Assembly 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
3. SYSTEM FUNCTION The power window control system has the following functions. POWER WINDOW CONTROL SYSTEM FUNCTION CHART Function Outline Manual UP / 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 driver side door window to be fully opened by one full push downward on power window switch Remote UP / DOWN function Function that allows power window master switch to control manual UP / DOWN operation of passenger side power window and rear power windows Key-off operation function Function that makes it possible to operate all power windows for approximately 43 seconds after ignition switch is turned OFF and driver side door, front passenger side door and rear doors have not been opened If 43 seconds have passed or a driver side door, front passenger side door and rear side door is opened while the MANUAL function is operating, window operation stops 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

DESCRIPTION

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

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

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1. CHECK HARNESS AND CONNECTOR (SWITCH INPUT POWER SUPPLY) Disconnect the E4 power window regulator master switch assembly connector. Turn the ignition switch ON. Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition E4-6 (B) - E4-1 (E) Ignition switch ON 11 to 14 V Reconnect the power window regulator master switch assembly connector. NG : CHECK AND REPLACE POWER SOURCE AND WIRE HARNESS OK: Go to next step
2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Remove the power window regulator master switch assembly. Measure the resistance of the switch when the switch is operated. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Window Lock Switch Condition Power Window Switch Condition Specified Condition 1 (E) - 4 (D) 3 (U) - 6 (B) Always (ON/OFF) UP Below 1 ohms 1 (E) - 3 (U) 1 (E) - 4 (D) Always (ON/OFF) OFF Below 1 ohms 1 (E) - 3 (U) 6 (B) - 4 (D) Always (ON/OFF) DOWN Below 1 ohms 1 (E) - 3 (U) 6 (B) - 4 (D) Always (ON/OFF) AUTO DOWN Below 1 ohms Reinstall the power window regulator master switch assembly. NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (See «REMOVAL»(ref-289782-S10683067482008070700000) ) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - MOTOR (FRONT LH)) Disconnect the E4 power window regulator master switch assembly connector. Disconnect the E3 front power window regulator motor assembly LH connector. Measure the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E4-4 (D) - E3-1 (D) Always Below 1 ohms E4-3 (U) - E3-2 (U) Always Below 1 ohms E4-4 (D) or E3-1 (D) - Body ground Always 10 kohms or higher E4-3 (U) or E3-2 (U) - Body ground Always 10 kohms or higher Reconnect the E4 power window regulator master switch assembly connector. Reconnect the E3 front power window regulator motor assembly LH connector. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH (See «REMOVAL»(ref-289782-S20722729552008070700000) )

If none of the power windows operates, the power window regulator master switch may have no power or may be malfunctioning.

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1. INSPECT FUSES (ECU-B, ECU-IG NO. 1) Remove the ECU-B fuse from the engine room relay block. Remove the ECU-IG No. 1 fuse from the main body ECU. Measure the resistance. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition ECU-B fuse Always Below 1 ohms ECU-IG No. 1 fuse Always Below 1 ohms Reinstall the fuses. NG : REPLACE FUSE OK: Go to next step
2. INSPECT MAIN BODY ECU (PWR RELAY) Remove the POWER fuse from the main body ECU. Turn the ignition switch ON. Measure the voltage between the POWER fuse terminal of the main body ECU and body ground. Standard voltage TERMINALS VOLTAGE REFERENCE Tester Connections Condition Specified Conditions POWER fuse terminal (1) - Body ground Ignition switch ON 11 to 14 V Reinstall the POWER fuse. NG : REPLACE MAIN BODY ECU (PWR RELAY) OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - BATTERY AND BODY GROUND) Disconnect the E4 power window regulator master switch assembly connector. Measure the voltage of the wire harness side connector. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E4-6 (B) - Body ground Ignition switch ON 11 to 14 V Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition E4-1 (E) - Body ground Always Below 1 ohms Reconnect the G1 power window regulator master switch assembly connector. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (See «REMOVAL»(ref-289782-S10683067482008070700000) )

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1. REMOVE FRONT ARMREST BASE UPPER PANEL LH HINT: Use the same procedure as for the RH side (see «DISASSEMBLY»(ref-289765-S39010926652008070700000) ).
2. REMOVE POWER WINDOW MASTER SWITCH Remove the 3 screws and the power window master switch.

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1. INSPECT POWER WINDOW MASTER SWITCH Check the resistance. Measure the resistance according to the value(s) in the table below. Standard resistance: Driver switch TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Window Lock Switch Condition Power Window Switch Condition Specified Condition 3 (U) - 6 (B) 1 (E) - 4 (D) Always (ON/OFF) UP Below 1 ohms 1 (E) - 3 (U) 1 (E) - 4 (D) Always (ON/OFF) OFF Below 1 ohms 4 (D) - 6 (B) 1 (E) - 3 (U) Always (ON/OFF) DOWN MANUAL Below 1 ohms 1 (E) - 3 (U) 4 (D) - 6 (B) Always (ON/OFF) DOWN AUTO Below 1 ohms If the result is not as specified, replace the power window master switch. Standard resistance: Front passenger side switch TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Window Lock Switch Condition Power Window Switch Condition Specified Condition 6 (B) - 16 (U) 1 (E) - 15 (D) OFF UP Below 1 ohms 1 (E) - 16 (U) 1 (E) - 15 (D) OFF OFF Below 1 ohms 6 (B) - 15 (D) 1 (E) - 16 (U) OFF DOWN Below 1 ohms 6 (B) - 16 (U) ON UP Below 1 ohms 1 (E) - 15 (D) ON UP 10 kohms or higher 15 (D) - 16 (U) ON OFF Below 1 ohms 6 (B) - 15 (D) ON DOWN Below 1 ohms 1 (E) - 15 (D) ON DOWN 10 kohms or higher If the result is not as specified, replace the power window master switch. Standard resistance: Rear LH side switch TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Window Lock Switch Condition Power Window Switch Condition Specified Condition 6 (B) - 12 (U) 1 (E) - 13 (D) OFF UP Below 1 ohms 1 (E) - 12 (U) 1 (E) - 13 (D) OFF OFF Below 1 ohms 1 (B) - 13 (D) 1 (E) - 12 (U) OFF DOWN Below 1 ohms 6 (B) - 12 (U) ON UP Below 1 ohms 1 (E) - 13 (D) ON UP 10 kohms or higher 12 (U) - 13 (D) ON OFF Below 1 ohms 6 (B) - 13 (D) ON DOWN Below 1 ohms 1 (E) - 12 (U) ON DOWN 10 kohms or higher If the result is not as specified, replace the power window master switch. Standard resistance: Rear RH side switch TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Window Lock Switch Condition Power Window Switch Condition Specified Condition 6 (B) - 10 (U) 1 (E) - 18 (D) OFF UP Below 1 ohms 1 (E) - 10 (U) 1 (E) - 18 (D) OFF OFF Below 1 ohms 6 (B) - 18 (D) 1 (E) - 10 (U) OFF DOWN Below 1 ohms 6 (B) - 10 (U) ON UP Below 1 ohms 1 (E) - 18 (D) ON UP 10 kohms or higher 10 (U) - 18 (D) ON OFF Below 1 ohms 6 (B) - 18 (D) ON DOWN Below 1 ohms 1 (E) - 10 (U) ON DOWN 10 kohms or higher If the result is not as specified, replace the power window master switch. Check the illumination operation. Apply battery voltage to the power window master switch and check that the illumination comes on. OK POWER WINDOW MASTER SWITCH REFERENCE CHART Measurement Condition Specified Condition Battery positive (+) --> Terminal 6 (B) Battery negative (-) --> Terminal 1 (E) Illumination come on If the result is not as specified, replace the power window master switch.

1. GENERAL The defogger system's thin heater wires are attached to the inside of the rear window and defog the window surface quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.
2. FUNCTION OF MAIN COMPONENT FUNCTION OF MAIN COMPONENT Component Outline RR DEF Relay Receives rear defogger activation request signals from the heater control and supplies power to the rear window defogger Rear Window Defogger Receives power from the DEF relay and heats the defogger wire

When the rear defogger switch, which is built into the heater control, is operated, the operation signals are transmitted to the DEF relay (coil side). When the DEF relay (coil side) receives the signals, it turns on the DEF relay (switch side) to operate the rear window defogger.

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1. INSPECT FUSES (DEF, ECU-IG NO. 2, HTR-IG) Remove the DEF, ECU-IG NO. 2 and HTR-IG fuses from the main body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance TERMINALS RESISTANCE REFERENCE Item Condition Specified Condition DEF fuse Always Below 1 ohms ECU-IG NO. 2 fuse Always Below 1 ohms HTR-IG fuse Always Below 1 ohms Reinstall the fuses. NG : REPLACE FUSES OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE BATTERY POSITIVE) Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Switch Condition Specified Condition L1-1 - Body ground Ignition switch ON Rear defogger switch ON 11 to 14 V NG: Go to step 4 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE CONNECTOR BODY GROUND) Disconnect the L2 rear window defogger wire connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L2-1 - Body ground Always Below 1 ohms Reconnect the rear window defogger wire connector. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE (See «REPAIR»(ref-289782-S22442180242008070700000) )
4. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER WIRE - MAIN BODY ECU) Disconnect the 2F main body ECU connector. Disconnect the L1 rear window defogger wire connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition L1-1 - 2F-2 Always Below 1 ohms L1-1 - Body ground Always 10 kohms or higher Reconnect the main body ECU connector. Reconnect the rear window defogger wire connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER SYSTEM POWER SOURCE) Disconnect the 2G main body ECU connector. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 2G-1 - Body ground Ignition switch ON 11 to 14 V Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. INSPECT MAIN BODY ECU (DEF RELAY) Remove the main body ECU. Remove the ECU-IG NO. 2 fuse from the main body ECU. Measure the resistance of the DEF relay. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition 2G-1 - 2F-2 When battery voltage absent 10 kohms or higher 2G-1 - 2F-2 When battery voltage applied to terminals 2ohms - 12 and ECU-IG NO. 2 fuse (DEF relay side) Below 1 ohms Reinstall the fuse. Reinstall the main body ECU. NG : REPLACE MAIN BODY ECU OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (HEATER CONTROL (REAR DEFOGGER SWITCH) MAIN BODY ECU) Disconnect the C40 heater control connector. Disconnect the 2Q main body ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition C40-2 (RDEF) - 2Q-12 Always Below 1 ohms C40-3 (IG+) - 2Q-10 Always Below 1 ohms C40-2 (RDEF) - Body ground Always 10 kohms or higher C40-3 (IG+) - Body ground Always 10 kohms or higher Reconnect the heater control connector. Reconnect the main body ECU connector. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (HEATER CONTROL - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard resistance TESTER CONNECTION SPECIFIED CONDITION CHART Tester Connection Condition Specified Condition C40-5 (E) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE HEATER CONTROL (See «DISASSEMBLY»(ref-289743-S26319538572008070700000) )

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1. INSPECT MAIN BODY ECU (DEFOGGER RELAY) Remove the DEF fuse. Using an ohmmeter, measure the resistance between the terminals of the DEF fuse. Standard resistance: Below 1 ohms Install the DEF fuse. Using an ohmmeter, measure the resistance between terminals 4Q-12 and 4Q-4 of the main body ECU connector. Standard resistance: Below 1 ohms Turn the ignition switch ON. Turn the defogger switch ON. Using a voltmeter, measure the voltage between terminal 4F-2 of the main body ECU connector and body ground. Standard voltage: 11 to 14 V

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1. INSPECT BACK DOOR GLASS (DEFOGGER WIRE) Turn the ignition switch ON. Turn the defogger switch ON. Check the voltage. Using a voltmeter, measure the voltage at the center of each defogger wire as shown in the illustration. Standard TERMINALS VOLTAGE REFERENCE Voltage Condition Approximately 5 V Wire not broken Approximately 10 or 0 V Wire broken NOTE: When measuring the voltage, wrap a piece of tin foil around the tip of the negative tester probe and press the foil against the wire with your finger, as shown in the illustration. HINT: If there is approximately 10 V, the wire may be faulty between the center of the wire and the battery. If there is no voltage, the wire may be faulty between the center of the wire and the ground. Place the positive (+) voltmeter probe against the defogger wire on the battery side. Place the foil strip on the negative (-) voltmeter probe against the wire on the ground side. Slide the positive (+) probe from the battery side to the ground side. The point where the voltage drops from approximately 10 V to 0 V is where the defogger wire is broken. HINT: If the defogger wire is not broken, the voltmeter should indicate 0 V at the positive (+) end of the defogger wire but the indicated voltage gradually increases to approximately 12 V as the meter probe moves toward the other end.
2. INSPECT REAR WINDOW DEFOGGER Check the operation. Check that the indicator illuminates and the rear window defogger becomes warm when the rear defogger switch is pressed. Check that the indicator turns off and the rear window defogger operation terminates after approximately 15 minutes.

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1. IF NECESSARY, REPAIR DEFOGGER WIRE Clean the broken wire tips with grease, wax and silicone remover. Place masking tape along both sides of the wire. Thoroughly stir the repair agent (DuPont paste No. 4817 or the equivalent). Using a fine tip brush, apply a small amount of the agent to the wire. After a few minutes, remove the masking tape. NOTE: Do not repair the defogger wire again for at least 24 hours.

See also:
• PRECAUTION