Home/Lexus/IS/Lexus IS III (2013-2016)/Repair manual/Windows/Power Window Control System (Diagnostic Codes & Symptom Tes…
Contents Wiring diagrams Section: Windows All sections

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

Windows 11 illustrations ~970 words

DESCRIPTION

The power window regulator motor assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assemblies. 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 stored.

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2313Glass Position Initialization IncompletePower window regulator motor assembly (for driver door) not initialized Power window regulator motor assembly (for driver door) is malfunctioning Battery disconnected when engine switch on (IG)Power window regulator motor assembly (for driver door) not initialized Power window regulator motor assembly (for driver door)

D-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2313Glass Position Initialization IncompletePower window regulator motor assembly (for front passenger door) not initialized Power window regulator motor assembly (for front passenger door) is malfunctioning Battery disconnected when engine switch on (IG)Power window regulator motor assembly (for front passenger door) not initialized Power window regulator motor assembly (for front passenger door)

P-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2313Glass Position Initialization IncompletePower window regulator motor assembly (for rear LH door) not initialized Power window regulator motor assembly (for rear LH door) is malfunctioning Battery disconnected when engine switch on (IG)Power window regulator motor assembly (for rear LH door) not initialized Power window regulator motor assembly (for rear LH door)

RL-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2313Glass Position Initialization IncompletePower window regulator motor assembly (for rear RH door) not initialized Power window regulator motor assembly (for rear RH door) is malfunctioning Battery disconnected when engine switch on (IG)Power window regulator motor assembly (for rear RH door) not initialized Power window regulator motor assembly (for rear RH door)

RR-DOOR MOTOR

The power window regulator motor assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or a rear power window regulator switch assembly. The power window regulator motor assemblies have motor, regulator and ECU functions.

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

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2311Power Window Motor MalfunctionEither condition is met: Power window regulator motor assembly (for driver door) is malfunctioning When ECU in power window regulator motor assembly (for driver door) determines that fully closed window position has deviated approx. 20 mm (0.787 in.) or more from normal positionPower window regulator motor assembly (for driver door) Incorrect installation of power window components Overheated power window regulator motor assembly (for driver door) Wire harness or connector

D-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2311Power Window Motor MalfunctionEither condition is met: Power window regulator motor assembly (for front passenger door) is malfunctioning When ECU in power window regulator motor assembly (for front passenger door) determines that fully closed window position has deviated approx. 20 mm (0.787 in.) or more from normal positionPower window regulator motor assembly (for front passenger door) Incorrect installation of power window components Overheated power window regulator motor assembly (for front passenger door) Wire harness or connector

P-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2311Power Window Motor MalfunctionEither condition is met: Power window regulator motor assembly (for rear LH door) is malfunctioning When ECU in power window regulator motor assembly (for rear LH door) determines that fully closed window position has deviated approx. 20 mm (0.787 in.) or more from normal positionPower window regulator motor assembly (for rear LH door) Incorrect installation of power window components Overheated power window regulator motor assembly (for rear LH door) Wire harness or connector

RL-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2311Power Window Motor MalfunctionEither condition is met: Power window regulator motor assembly (for rear RH door) is malfunctioning When ECU in power window regulator motor assembly (for rear RH door) determines that fully closed window position has deviated approx. 20 mm (0.787 in.) or more from normal positionPower window regulator motor assembly (for rear RH door) Incorrect installation of power window components Overheated power window regulator motor assembly (for rear RH door) Wire harness or connector

RR-DOOR MOTOR

The power window regulator motor assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assemblies. The power window regulator motor assemblies have motor, regulator and ECU functions.

This DTC is output when the ECU built into a power window regulator motor assembly and multiplex network master switch assembly determine that the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assembly is stuck.

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2312Power Window Switch MalfunctionMultiplex network master switch assembly stuck Multiplex network master switch assembly held in same position for more than 20 seconds Multiplex network master switch assembly operated for 20 seconds or moreMultiplex network master switch assembly

MASTER SWITCH

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2312Power Window Switch MalfunctionMultiplex network master switch assembly stuck Multiplex network master switch assembly held in same position for more than 20 secondsMultiplex network master switch assembly Power window regulator motor assembly (for driver door) Wire harness or connector

D-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2312Power Window Switch MalfunctionPower window regulator switch assembly stuck Power window regulator switch assembly held in same position for more than 20 secondsPower window regulator switch assembly Power window regulator motor assembly (for front passenger door) Wire harness or connector

P-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2312Power Window Switch MalfunctionRear power window regulator switch assembly (for LH door) stuck Rear power window regulator switch assembly (for LH door) held in same position for more than 20 secondsRear power window regulator switch assembly (for LH door) Power window regulator motor assembly (for rear LH door) Wire harness or connector

RL-DOOR MOTOR

DTC No.Detection ItemDTC Detection ConditionTrouble Area
B2312Power Window Switch MalfunctionRear power window regulator switch assembly (for RH door) stuck Rear power window regulator switch assembly (for RH door) held in same position for more than 20 secondsRear power window regulator switch assembly (for RH door) Power window regulator motor assembly (for rear RH door) Wire harness or connector

RR-DOOR MOTOR

Scheme 69

Scheme 69: WIRING DIAGRAM

Scheme 70

Scheme 70

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

Scheme 71

Scheme 71: WIRING DIAGRAM

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

Scheme 72

Scheme 72: WIRING DIAGRAM

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

Scheme 73

Scheme 73: WIRING DIAGRAM

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

Scheme 74

Scheme 74: WIRING DIAGRAM

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

Scheme 75

Scheme 75: WIRING DIAGRAM

If the manual up and down function operates normally but the auto up and down function does not, then fail-safe mode may be functioning.

If power window initialization has not been performed, the auto up and down function will not operate.

Refer to INITIALIZATION [04/2013 - ]

Scheme 76

Scheme 76: WIRING DIAGRAM

If the manual up and down function operates normally but the auto up and down function does not, then fail-safe mode may be functioning.

If power window initialization has not been performed, the auto up and down function will not operate.

Refer to INITIALIZATION [04/2013 - ]

Scheme 77

Scheme 77: WIRING DIAGRAM

If the manual up and down function operates normally but the auto up and down function does not, then fail-safe mode may be functioning.

If power window initialization has not been performed, the auto up and down function will not operate.

Refer to INITIALIZATION [04/2013 - ]

Scheme 78

Scheme 78: WIRING DIAGRAM

If the manual up and down function operates normally but the auto up and down function does not, then fail-safe mode may be functioning.

If power window initialization has not been performed, the auto up and down function will not operate.

Refer to INITIALIZATION [04/2013 - ]

Scheme 79

Scheme 79: WIRING DIAGRAM

Wireless Transmitter-linked Function

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

Key-linked Function

  1. When the driver door key cylinder (key linked switch) is turned: 1) the door lock motor receives the signal; 2) the main body ECU (multiplex network body ECU) sends the signal to the power window regulator motor assemblies; 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 43 seconds after the engine switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU (multiplex network body ECU).
  2. However, when approximately 43 seconds have elapsed, or the driver door or front passenger door is opened within approximately 43 seconds of the engine switch being turned off, the power window regulator motor assembly stops operating.
  3. During auto operation, when 43 seconds have elapsed and key-off operation is prohibited, the window operation stops immediately.

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 operation being unable to fully close the window.

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 [04/2013 - ]