Power Window Control System (Diagnostic Codes & Symptom Tests): Overview Lexus IS II facelift

DESCRIPTION

The power window regulator motor is operated by the multiplex network master switch assembly or power window regulator switch assembly. The power window regulator motor assembly has motor, regulator and ECU functions.

This DTC is output when the power window regulator motor assembly has a malfunction, or the ECU built into the regulator motor assembly determines that the fully closed window position has deviated approximately 20 mm (0.787 in.) or more from the normal position.

HINT

DTC B2311 can be stored in each power window regulator motor assembly (power window ECU).

D-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER SIDE))

P-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER SIDE))

RL-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR LH SIDE))

RR-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH SIDE))

The power window regulator motor assembly is operated by the multiplex network master switch assembly or power window regulator switch assembly. The power window regulator motor assembly has motor, regulator and ECU functions.

This DTC is output when the ECU built into the regulator motor determines that the multiplex network master switch assembly or power window regulator switch assembly is stuck.

HINT

DTC B2312 can be stored in the multiplex network master switch assembly and in each power window regulator motor assembly (power window ECU).

MASTER SWITCH (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)

D-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER SIDE))

P-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER SIDE))

RL-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR LH SIDE))

RR-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH SIDE))

Scheme 86

Scheme 87

Scheme 88

Scheme 89

1. for Driver Side
2. for Front Passenger Side
3. for Rear LH Side
4. for Rear RH Side

The power window regulator motor assembly is operated by the multiplex network master switch assembly or power window regulator switch assembly. The power window regulator motor assembly has motor, regulator and ECU functions.

When the ECU determines that the power window regulator motor assembly has not been initialized, DTC B2313 is set.

HINT

DTC B2313 can be stored in each power window regulator motor assembly (power window ECU).

D-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER SIDE))

P-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER SIDE))

RL-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR LH SIDE))

RR-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH SIDE))

When the engine switch is on (IG), the multiplex network master switch assembly sends remote up/down signals to each power window regulator motor assembly via the LIN communication line.

Scheme 90

Scheme 91

1. READ VALUE USING TECHSTREAM (Master Switch) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Master Switch / Data List. Read the Data List according to the display on the Techstream. MASTER SWITCH (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) Tester Display Measurement Item/Range Normal Condition Diagnostic Note P Door P/W Auto SW Front passenger side power window auto up/down switch signal / ON or OFF ON: Front passenger door power window auto switch operated OFF: Front passenger door power window auto switch not operated - RL Door P/W Auto SW Rear LH side power window auto up/down switch signal / ON or OFF ON: Rear LH power window auto switch operated OFF: Rear LH power window auto switch not operated - RR Door P/W Auto SW Rear RH side power window auto up/down switch signal / ON or OFF ON: Rear RH power window auto switch operated OFF: Rear RH power window auto switch not operated - P Door P/W Up SW Front passenger side power window manual up switch signal / ON or OFF ON: Front passenger door power window manual up switch operated OFF: Front passenger door power window manual up switch not operated - RL Door P/W Up SW Rear LH side power window manual up switch signal / ON or OFF ON: Rear LH power window manual up switch operated OFF: Rear LH power window manual up switch not operated - RR Door P/W Up SW Rear RH side power window manual up switch signal / ON or OFF ON: Rear RH power window manual up switch operated OFF: Rear RH power window manual up switch not operated - P Door P/W Down SW Front passenger side power window manual down switch signal / ON or OFF ON: Front passenger door power window manual down switch operated OFF: Front passenger door power window manual down switch not operated - RL Door P/W Down SW Rear LH side power window manual down switch signal / ON or OFF ON: Rear LH power window manual down switch operated OFF: Rear LH power window manual down switch not operated - RR Door P/W Down SW Rear RH side power window manual down switch signal / ON or OFF ON: Rear RH power window manual down switch operated OFF: Rear RH power window manual down switch not operated - Window Lock Switch Status Window lock switch signal / ON or OFF ON: Window lock switch LOCK position OFF: Window lock switch UNLOCK position - OK On the Techstream screen, ON or OFF is displayed accordingly. NG --> See step 3 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (LIN COMMUNICATION LINE) Disconnect the multiplex network master switch assembly connector. Disconnect the power window regulator motor assembly (for front passenger side, rear LH side and rear RH side) connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance FOR FRONT PASSENGER SIDE Tester Connection Condition Specified Condition M17-10 (LIN1) - L15-9 (LIN) Always Below 1 ohms FOR REAR LH SIDE Tester Connection Condition Specified Condition M17-10 (LIN1) - O10-9 (LIN) Always Below 1 ohms FOR REAR RH SIDE Tester Connection Condition Specified Condition M17-10 (LIN1) - N10-9 (LIN) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Replace the multiplex network master switch assembly. Refer to «DISASSEMBLY - Step 2»(ref-387450-S00524585432011022400000). NEXT: Go to next step
4. CHECK REMOTE UP / DOWN FUNCTION Check that the remote up/down function using the multiplex network master switch assembly operates the power windows. Refer to «OPERATION CHECK»(ref-387457-S01402700302011022400000). OK Remote up/down function is normal. Result Result Proceed to OK A NG (Front passenger side power window remote up / down function does not operate) B NG (Rear LH side power window remote up / down function does not operate) C NG (Rear RH side power window remote up / down function does not operate) D D --> See step 7 C --> See step 6 B --> See step 5 A --> END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY IS DEFECTIVE)
5. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side). Refer to «REMOVAL»(/lexus/is/ii-facelift-2008-2010/remont/windows/#power-windows-service-information)
6. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Side). Refer to «REMOVAL»(/lexus/is/ii-facelift-2008-2010/remont/windows/#power-windows-service-information)
7. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Side). Refer to «REMOVAL»(/lexus/is/ii-facelift-2008-2010/remont/windows/#power-windows-service-information)

When the engine is running or the engine switch is on (IG), the power window regulator motor assembly (for driver side) is operated by the multiplex network master switch assembly. The power window regulator motor assembly (for driver side) has motor, regulator, and ECU functions.

HINT

If the pulse sensor built into the power window regulator motor assembly (for driver side) malfunctions, the power window control system enters fail-safe mode. The remote up/down and auto up/down functions cannot be operated during fail-safe mode. However, the power window can be closed by holding the multiplex network master switch assembly in the auto up position, and opened manually by pushing down the multiplex network master switch assembly.

Scheme 92

When the engine is running or the engine switch is on (IG), the power window regulator motor assembly (for front passenger side) is operated by the power window regulator switch assembly (for front passenger side). The power window regulator motor assembly (for front passenger side) has motor, regulator, and ECU functions.

HINT

If the pulse sensor built into the power window regulator motor assembly (for front passenger side) malfunctions, the power window control system enters fail-safe mode. The remote up/down and auto up/down functions cannot be operated during fail-safe mode. However, the power window can be closed by holding the power window regulator switch assembly (for front passenger side) in the auto up position, and opened manually by pushing down the power window regulator switch assembly (for front passenger side).

Scheme 93

When the engine is running or the engine switch is on (IG), the power window regulator motor assembly (for rear LH side) is operated by the power window regulator switch assembly (for rear LH side). The power window regulator motor assembly (for rear LH side) has motor, regulator, and ECU functions.

HINT

If the pulse sensor built into the power window regulator motor assembly (for rear LH side) malfunctions, the power window control system enters fail-safe mode. The remote up/down and auto up/down functions cannot be operated during fail-safe mode. However, the power window can be closed by holding the power window regulator switch assembly (for rear LH side) in the auto up position, and opened manually by pushing down the power window regulator switch assembly (for rear LH side).

Scheme 94

When the engine is running or the engine switch is on (IG), the power window regulator motor assembly (for rear RH side) is operated by the power window regulator switch assembly (for rear RH side). The power window regulator motor assembly (for rear RH side) has motor, regulator, and ECU functions.

HINT

If the pulse sensor built into the power window regulator motor assembly (for rear RH side) malfunctions, the power window control system enters fail-safe mode. The remote up/down and auto up/down functions cannot be operated during fail-safe mode. However, the power window can be closed by holding the power window regulator switch assembly (for rear RH side) in the auto up position, and opened manually by pushing down the power window regulator switch assembly (for rear RH side).

Scheme 95

If the manual up/down function can be performed but the auto up/down function cannot, then the fail-safe mode may be functioning.

If the power window initialization. Refer to INITIALIZATION has not been performed, the auto up/down function will not operate.

Scheme 96

If the manual up/down function can be performed but the auto up/down function cannot, the fail-safe mode may be functioning.

If the power window initialization. Refer to INITIALIZATION has not been performed, the auto up/down function will not operate.

Scheme 97

If the manual up/down function can be performed but the auto up/down function cannot, the fail-safe mode may be functioning.

If the power window initialization. Refer to INITIALIZATION has not been performed, the auto up/down function will not operate.

Scheme 98

If the manual up/down function can be performed but the auto up/down function cannot, the fail-safe mode may be functioning.

If the power window initialization. Refer to INITIALIZATION has not been performed, the auto up/down function will not operate.

Scheme 99

1. When a key switch is pushed: 1) the door control receiver assembly receives the key signal; 2) the door control receiver assembly sends a signal to the certification ECU (smart key ECU assembly); 3) the multiplex network master switch assembly sends the operation permission signal to the power window regulator motor assembly; and 4) the power window regulator motor assemblies are activated.
2. When the driver door key cylinder (key linked switch) is turned: 1) the door lock motor receives the signal; 2) the multiplex network master switch assembly sends the signal to the power window regulator motor assembly; and 3) the power window regulator motor assemblies are activated.

1. When the front doors are closed, each power window regulator motor assembly can control its power window operation for approximately 45 seconds after the engine switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU RH (cowl side junction block RH).
2. However, when approximately 45 seconds have elapsed, or the driver side door or front passenger side door is opened within approximately 45 seconds of the engine switch being turned off, the power window regulator motor assembly disables manual operation.
3. During an auto operation, when 45 seconds have passed and key-off operation is prohibited, the window operation will not stop until the auto operation is completed.

If a door glass or a power window regulator motor assembly does not operate smoothly, the jam protection function may be triggered automatically, resulting in the auto up function being unable to fully close the window.

HINT

This symptom may occur for any of the windows.

This symptom may occur for any of the windows.

The jam protection function operates within a specified range during the manual up or auto up operation.

See also:
• REMOVAL