Windshield / Windowglass: Overview Lexus RX II facelift

SYSTEM DESCRIPTION

1. POWER WINDOW CONTROL SYSTEM DESCRIPTION The power window control system controls the power window UP/DOWN function by using regulator motors. This system is mainly controlled by the multiplex network master switch built into the driver's door and multiplex network switches built into passenger's doors. Pressing any of these multiplex network switches or the driver side door window switch mounted on the master switch transmits an UP/DOWN signal to the regulator motor for the corresponding power window, which then operates the power window UP/DOWN. Pressing any switch for the power windows except the driver's power window mounted on the master switch transmits a remote UP/DOWN signal to the body ECU via the BEAN line. Then the body ECU transmits this remote signal to the regulator switch for the corresponding power window via the BEAN line and activates the motor to open/close the power window. The power window control system has the following functions: FUNCTION OUTLINE Function Outline Manual up-and-down function Function that causes window to go up while power window switch is being pulled halfway up and to go down while pushed halfway down. Window stops as soon as the switch is released. All door auto up-and-down function Function that enables window of all doors to be fully opened or closed by one press of power window switch. Jam protection function Function that automatically stops power window and moves it downward if a foreign object gets jammed in door window during auto-up operation. Remote control function Function that allows power window master switch to control AUTO and MANUAL up-and-down operations of front passenger door window and rear door windows. Key-off operation function Function that makes it possible to operate power window for approx. 45 seconds after ignition switch is turned to ACC or LOCK position, if either front door is not opened. Key-linked up-and-down function Function that causes window to go up while driver's door key is turned to lock side for more than 1.5 seconds and to go down while turned to unlock side for more than 1.5 seconds. Window stops as soon as the key is returned to original position. Transmitter-linked down function Function that causes window to go down while unlock switch on transmitter is pressed for more than 2.5 seconds. Window stops as soon as the switch is released. Diagnosis Function that allows the power window switch to make a diagnosis for failed section when power window switch detects a malfunction in power window system. Power window switch light comes on or blinks to inform driver. Fail-safe A fail-safe function to disable a part of power window functions if pulse sensor in power window motor has a malfunction: All door auto up-and-down function and remote control function are disabled. Manual operation is possible by each power window switch.

DESCRIPTION

This circuit supplies power to operate the multiplex network master switch.

Scheme 1

Scheme 2

1. CHECK WIRE HARNESS (MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND) Disconnect the P22 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND (VOLTAGE) Tester Connection Condition Specified Condition P22-9 (CPUB) - Body ground Always 10 to 14 V P22-10 (BDR) - Body ground Always 10 to 14 V P22-20 (SIG) - Body ground Ignition switch ON 10 to 14 V Standard resistance MULTIPLEX NETWORK MASTER SWITCH - BATTERY AND BODY GROUND (RESISTANCE) Tester Connection Condition Specified Condition P22-2 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit supplies power to operate the multiplex network switch.

Scheme 3

Scheme 4

1. CHECK WIRE HARNESS (MULTIPLEX NETWORK SWITCH) Disconnect the P19 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage MULTIPLEX NETWORK SWITCH (VOLTAGE) Tester Connection Condition Specified Condition P19-12 (BDR) - Body ground Always 10 to 14 V Standard resistance MULTIPLEX NETWORK SWITCH (RESISTANCE) Tester Connection Condition Specified Condition P19-7 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit supplies power to operate the multiplex network switch.

Scheme 5

Scheme 6

1. CHECK WIRE HARNESS (MULTIPLEX NETWORK SWITCH - BATTERY AND BODY GROUND) Disconnect the P20 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage MULTIPLEX NETWORK SWITCH - BATTERY AND BODY GROUND (VOLTAGE) Tester Connection Condition Specified Condition P20-12 (BDR) - Body ground Always 10 to 14 V Standard resistance MULTIPLEX NETWORK SWITCH - BATTERY AND BODY GROUND (RESISTANCE) Tester Connection Condition Specified Condition P20-7 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit supplies power to operate the multiplex network switch.

Scheme 7

Scheme 8

1. CHECK WIRE HARNESS (MULTIPLEX NETWORK SWITCH - BATTERY AND BODY GROUND) Disconnect the P21 connector. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage MULTIPLEX NETWORK SWITCH - BATTERY AND BODY GROUND (VOLTAGE) Tester Connection Condition Specified Condition P21-12 (BDR) - Body ground Always 10 to 14 V Standard resistance MULTIPLEX NETWORK SWITCH - BATTERY AND BODY GROUND (RESISTANCE) Tester Connection Condition Specified Condition P21-7 (GND) - Body ground Always Below 1 ohms NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit transmits signals from the multiplex network master switch to power window regulator motor.

Scheme 9

Scheme 10

Scheme 11

1. INSPECT POWER WINDOW REGULATOR MOTOR Remove the power window motor. Apply battery voltage to the motor connector according to the table below. NOTE: Do not apply battery to any terminals except terminals 1 and 2. Standard POWER WINDOW REGULATOR MOTOR Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (D) Battery negative (-) --> Terminal 2 (U) Motor gear rotates clockwise Battery positive (+) --> Terminal 2 (U) Battery negative (-) --> Terminal 1 (D) Motor gear rotates counterclockwise NG : REPLACE POWER WINDOW REGULATOR MOTOR OK : Go to next step.
2. CHECK WIRE HARNESS (WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK MASTER SWITCH) Disconnect the P22 and P23 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK MASTER SWITCH Tester Connection Condition Specified Condition P22-1 (UP) - P23-2 (U) Always Below 1 ohms P22-11 (DN) - P23-1 (D) Always Below 1 ohms P22-1 (UP) - Body ground Always 10 kohms or higher P22-11 (DN) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit transmits signals from the multiplex network switch to power window regulator motor.

Scheme 12

Scheme 13

Scheme 14

1. INSPECT POWER WINDOW REGULATOR MOTOR Remove the power window motor. Apply battery voltage to the motor connector according to the table below. NOTE: Do not apply battery to any terminals except terminals 1 and 2. Standard POWER WINDOW REGULATOR MOTOR Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (D) Battery negative (-) --> Terminal 2 (U) Motor gear rotates counterclockwise Battery positive (+) --> Terminal 2 (U) Battery negative (-) --> Terminal 1 (D) Motor gear rotates clockwise NG : REPLACE POWER WINDOW REGULATOR MOTOR OK : Go to next step.
2. CHECK WIRE HARNESS (WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH) Disconnect the P19 and P24 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH Tester Connection Condition Specified Condition P19-1 (DN) - P24-1 (D) Always Below 1 ohms P19-6 (UP) - P24-2 (U) Always Below 1 ohms P19-1 (DN) - Body ground Always 10 kohms or higher P19-6 (UP) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit transmits signals from the multiplex network switch to power window regulator motor.

Scheme 15

Scheme 16

1. INSPECT POWER WINDOW REGULATOR MOTOR Remove the power window motor. Apply battery voltage to the motor connector according to the table below. NOTE: Do not apply battery to any terminals except terminals 1 and 2. Standard POWER WINDOW REGULATOR MOTOR Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (D) Battery negative (-) --> Terminal 2 (U) Motor gear rotates clockwise Battery positive (+) --> Terminal 2 (U) Battery negative (-) --> Terminal 1 (D) Motor gear rotates counterclockwise NG : REPLACE POWER WINDOW REGULATOR MOTOR OK : Go to next step.
2. CHECK WIRE HARNESS (WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH) Disconnect the P20 and P25 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH Tester Connection Condition Specified Condition P20-1 (DN) - P25-1 (D) Always Below 1 ohms P20-6 (UP) - P25-2 (U) Always Below 1 ohms P20-1 (DN) - Body ground Always 10 kohms or higher P20-6 (UP) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This circuit transmits signals from the multiplex network switch to power window regulator motor.

Scheme 17

Scheme 18

1. INSPECT POWER WINDOW REGULATOR MOTOR Remove the power window motor. Apply battery voltage to the motor connector according to the table below. NOTE: Do not apply battery to any terminals except terminals 1 and 2. Standard POWER WINDOW REGULATOR MOTOR Measurement Condition Specified Condition Battery positive (+) --> Terminal 1 (D) Battery negative (-) --> Terminal 2 (U) Motor gear rotates counterclockwise Battery positive (+) --> Terminal 2 (U) Battery negative (-) --> Terminal 1 (D) Motor gear rotates clockwise NG : REPLACE POWER WINDOW REGULATOR MOTOR OK : Go to next step.
2. CHECK WIRE HARNESS (WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH) Disconnect the P21 and P26 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance WINDOW REGULATOR MOTOR - MULTIPLEX NETWORK SWITCH Tester Connection Condition Specified Condition P21-1 (DN) - P26-1 (D) Always Below 1 ohms P21-6 (UP) - P26-2 (U) Always Below 1 ohms P21-1 (DN) - Body ground Always 10 kohms or higher P21-6 (UP) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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. HINT: The rear window defogger is linked with the mirror defogger.
2. FUNCTION OF MAIN COMPONENT MAIN COMPONENT FUNCTION Component Outline RR-DEF Relay Receives rear defogger activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to rear window defogger. Rear Window Defogger Receives power from DEFOG relay and heats defogger wire. w/ Deicer Deicer Relay Receives front deicer activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to front window deicer. w/ Deicer Front Window Deicer Receives power from DEICER relay and heats deicer wire.
3. DESCRIPTION FUNCTION OUTLINE Function Outline Defogs the rear window surface Receives rear defogger activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to rear window defogger. Receives power from DEFOG relay and heats defogger wire. Defogs the front window surface Receives front deicer activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to front window deicer. Receives power from DEICER relay and heats deicer wire.

1. The rear defogger & mirror heater switch on the multi-display inputs a request signal to the A/C amplifier (ECU). Then, the A/C amplifier turns ON the RR-DEF relay built into the power distributor in response to the input, thus switching ON the rear defogger. (The deicer and mirror heater also turn ON at the same time) HINT: The power distributor is built into the J/B No.2.
2. The RR-DEF relay is built into the J/B No.2. For inspection, use the terminals in the J/B No.2.
3. If RR-DEF relay is malfunctioning, replace the J/B No.2.

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Scheme 30

1. INSPECT COMMUNICATION LINE Use the intelligent tester to check for normal function of the multiplex communication system. (ECU unconnected, communication line malfunctioning) Without DTC B1214, B1215 or B 1262 outputs, proceed to A. (ECU unconnected, communication line malfunctioning) With DTC B1214, B1215 or B 1262 outputs, proceed to B. B: GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-236026-S31587020652006062900000) A: Go to next step.
2. INSPECT FUSE (HEATER, RR-DEF) Remove the HEATER fuse from the instrument panel J/ B. Remove the RR-DEF fuse from the FL block. Check the resistance. Standard resistance: Below 1 ohms NG : REPLACE FUSE OK : Go to next step.
3. PERFORM ACTIVE TEST Connect the intelligent tester (with CAN VIN) to the DLC3. Turn the ignition switch on. Perform the ACTIVE TEST according to the display on the tester. AIR CONDITIONER: AIR CONDITIONER TEST DETAILS Item Test Details Diagnostic Note DEFOGGER RLY-R Operate rear window defogger OFF/ON - NG : Go to step 5 OK : Go to next step.
4. CHECK AIR CONDITIONING SYSTEM OPERATE NG: GO TO «AIR CONDITIONING SYSTEM»(ref-236010-S30921850592006062900000) OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
5. INSPECT JUNCTION BLOCK Check the voltage of the terminal of the J/B. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Switch Position Specified Condition 2H-12 - Body Ground Ignition switch ON 10 to 14 V 2H-12 - Body Ground Ignition switch OFF Below 1 V 2B-8 - Body Ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) OK : Go to next step.
6. INSPECT JUNCTION BLOCK (MODE MONITOR TERMINAL) Check the voltage of the terminal to the following condition. Engine running. A/C switch is OFF. Rear defogger and deicer switch is ON. Result RESULT REFERENCE Result Proceed to More than 5 V A Below 2 V B B: Go to step 12 A: Go to next step.
7. INSPECT JUNCTION BLOCK (RR-DEF RELAY) Remove the junction block No.2. Connect the battery positive (+) lead to terminal 2B-8 and battery negative (-) terminal lead to terminal 2H-12, 2B-7 and 2H-11. Check the voltage of the RR-DEF relay terminals. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Condition 2B-7 - 2H-13 Always Below 1 V Connect another battery positive (+) lead to the terminal 2H-12. Check the voltage of the RR-DEF relay terminals. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Condition 2B-7 - 2H-13 Ignition switch ON Below 1 V 2B-7 - 2H-13 Ignition switch OFF 10 to 14 V NG : REPLACE JUNCTION BLOCK OK : Go to next step.
8. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Disconnect the A8 connector. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified Condition A8-19 (DFG) - Body ground Ignition switch: ON 10 to 14 V A8-19 (DFG) - Body ground Ignition switch: OFF Below 1 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step.
9. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY Connect the A8 connector. Connect the intelligent tester to the DLC3. Measure the voltage according to the value(s) in the table below. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester connection Intelligent tester condition Specified condition A8-19 (DFG) - Body ground ACTIVE TEST: ON (*1) 10 to 14 V A8-19 (DFG) - Body ground ACTIVE TEST: OFF (*1) Below 1 V HINT: *1: Perform the ACTIVE TEST according to the display on the tester. AIR CONDITIONER: AIR CONDITIONER TEST DETAILS Item Test Details Diagnostic Note DEFOGGER RLY-R Operate rear window defogger OFF/ON - NG : REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY OK : Go to next step.
10. INSPECT REAR WINDOW DEFOGGER WIRE NOTE: When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Take care not to damage the wires. Do not use detergents or glass cleaners that have abrasive ingredients. When measuring 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. Turn the ignition switch on. Turn the defogger switch ON. Check the voltage at the center of each defogger wire, as shown in the illustration. Standard voltage VOLTAGE CRITERIA Voltage Criteria Approx .5 V Wire is not broken Approx. 10 or 0 V Wire is broken HINT: If there is approximately 10 V, the wire may be broken between the center of the wire and the wire end on the battery side. If there is no voltage, the wire may be broken between the center of the wire and the end on the ground side. Place the voltmeter positive (+) lead against the defogger wire on the battery side. Place the voltmeter negative (-) lead with the foil strip against the wire on the ground side. Slide the positive (+) lead 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 indicates 0 V at the positive (+) end of the defogger wire but gradually increases to approximately 12 V as the meter probe moves to the other end. NG : REPAIR REAR WINDOW DEFOGGER WIRE OK : Go to next step.
11. CHECK WIRE HARNESS (REAR WINDOW DEFOGGER - JUNCTION BLOCK NO.2) Disconnect the N4, N5 defogger and 2B J/B connectors. Check the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition N4-1 - 2B-7 Below 1 ohms N4-1 - Body ground 10 kohms or higher N5-1 - Body ground Below 1 ohms N5-1 - 2B-7 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE NOISE FILTER
12. CHECK WIRE HARNESS (REAR WINDOW DEFOGGER - JUNCTION BLOCK NO. 2) Disconnect the N4, N5 defogger and 2B J/B connectors. Check the resistance of the wire harness side connectors. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition N4-1 - 2B-7 Below 1 ohms N4-1 - Body ground 10 kohms or higher N5-1 - Body ground Below 1 ohms N5-1 - 2B-7 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go to next step.
13. INSPECT JUNCTION BLOCK (RR-DEF RELAY) Remove the junction block No.2. Connect the battery positive (+) lead to terminal 2B-8 and battery negative (-) terminal lead to terminal 2H-12, 2B-7 and 2H-11. Check the voltage of the RR-DEF relay terminals. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Condition 2B-7 - 2H-12 Always Below 1 V Connect another battery positive (+) lead to the terminal 2H-12. Check the voltage of the RR-DEF relay terminals. Standard voltage TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Condition 2B-7 - 2H-12 Ignition switch ON 10 to 14 V 2B-7 - 2H-12 Ignition switch OFF Below 1 V NG : REPLACE JUNCTION BLOCK OK : REPLACE NOISE FILTER

Scheme 31

Scheme 32

Scheme 33

1. INSPECT BACK WINDOW (DEFOGGER WIRE) NOTE: When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Take care not to damage the wires. Do not use detergents or glass cleaners that have abrasive ingredients. When measuring voltage, wrap a piece of tin foil around the tip of the negative rester probe and press the foil against the wire with your finger, as shown in the illustration. Turn the ignition switch on. Turn the defogger switch ON. Check the voltage at the center of each defogger wire, as shown in the illustration. Standard voltage VOLTAGE CRITERIA Voltage Criteria Approx. 5 V Wire is not broken Approx. 10 or 0 V Wire is broken HINT: If there is approximately 10V, the wire may be faulty between the center of the wire and the wire and on the battery side. If there is no voltage, the wire may be faulty between the center of the wire and the wire end on the ground side. Place the voltmeter's positive (+) lead against the defogger wire on the battery side. Place the voltmeter's negative (-) lead with the foil strip against the wire on the ground side. Slide the positive (+) lead from the battery side to the ground side. The point where the voltage drops from approximately 10 V to 0 V is the place 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 gradually increases to approximately 12 V as the meter probe moves to the other end.
2. INSPECT FRONT WINDOW (DEICER WIRE) Check the resistance of the deicer wire. Standard resistance TESTER CONNECTION SPECIFIED CONDITION Tester Connection Condition Specified Condition 1 - 2 Always Below 1 ohms 3 - 2 Always Below 1 ohms HINT: If the result is not as specified, replace the front window.

Scheme 34

Scheme 35

1. IF NECESSARY, REPAIR THE DEFOGGER WIRE Clean the broken wire tips with grease, wax and silicone remover. Place the masking tape along both sides of the wire. Thoroughly mix the repair agent (Dupont paste No. 4817 or 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
• REMOVAL