Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred) as much as possible when the customer brings the vehicle in.

>> GO TO 2

REPRODUCE THE MALFUNCTION INFORMATION

Check the malfunction on the vehicle that the customer describes.
Inspect the relation of the symptoms and the condition when the symptoms occur.

>> GO TO 3

IDENTIFY THE MALFUNCTIONING SYSTEM WITH “SYMPTOM DIAGNOSIS”

Use “Symptom diagnosis” from the symptom inspection result in step 2 and then identify where to start per-
forming the diagnosis based on possible causes and symptoms.

>> GO TO 4

IDENTIFY THE MALFUNCTIONING PARTS WITH “COMPONENT DIAGNOSIS”

Perform the diagnosis with “Component diagnosis” of the applicable system.

>> GO TO 5

REPAIR OR REPLACE THE MALFUNCTIONING PARTS

Repair or replace the specified malfunctioning parts.

>> GO TO 6

FINAL CHECK

Check that malfunctions are not reproduced when obtaining the malfunction information from the customer,
referring to the symptom inspection result in step 2.

Are the malfunctions corrected?

YES

>> Inspection End.

>> GO TO 3

PWC-4

< FUNCTION DIAGNOSIS >

POWER WINDOW SYSTEM

FUNCTION DIAGNOSIS

POWER WINDOW SYSTEM

System Diagram

INFOID:0000000005274599

System Description

INFOID:0000000005274600

MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH

INPUT/OUTPUT SIGNAL CHART

POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH

INPUT/OUTPUT SIGNAL CHART

ALKIA1390GB

Item

Input signal to main power window and

door lock/unlock switch

Main power window and door

lock/unlock switch function

Actuator

Main power window
and door lock/unlock
switch

All power window motor UP/DOWN
signal

Power window control

Power window motors

Power window and
door lock/unlock
switch RH

Front power window motor RH UP/
DOWN signal

Front power window motor RH

Rear power window
switch (crew cab)

Rear power window motor UP/DOWN
signal

Rear power window motor

BCM

RAP signal

—

Item

Input signal to front power window

switch

Front power window switch

function

Actuator

Power window and
door lock/unlock
switch RH

Front power window motor RH UP/
DOWN signal

Power window control

Front power window motor RH

BCM

RAP signal

POWER WINDOW SYSTEM

PWC-5

< FUNCTION DIAGNOSIS >

PWC

POWER WINDOW OPERATION

• Power window system is operable during the retained power operation timer after turning ignition switch ON

and OFF.

• Main power window and door lock/unlock switch can open/close all windows.
• Power window and door lock unlock switch RH & rear power window switches LH and RH (crew cab) can

open/close the corresponding windows.

POWER WINDOW AUTO DOWN OPERATION (FRONT LH)

• AUTO DOWN operation can be performed when main power window turns to AUTO.

RETAINED POWER OPERATION

• Retained power operation is an additional power supply function that enables power window system to oper-

ate during the 45 seconds even when ignition switch is turned OFF

Retained power function cancel conditions

• Front door CLOSE (door switch OFF)

→

OPEN (door switch ON).

• When ignition switch is ON.
• When timer time passes. (45 seconds)

POWER WINDOW LOCK

Ground circuit inside main power window and door lock/unlock switch shuts off when power window lock
switch is ON. This inhibits power window switch operation except with the main power window and door lock/
unlock switch.

Component Parts Location

INFOID:0000000005274601

ALKIA1391ZZ

Main power window and door lock/
unlock switch D7

Front power window motor LH D9,
RH D104

BCM M18, M19, M20 (view with low-
er instrument panel LH removed)

Power window and door lock/unlock
switch RH D105

Front door switch (crew cab) LH B8,
RH B108

Rear power window switch LH D203,
RH D303

Rear power window motor LH D204,
RH D304

Front door switch (king cab) LH
D213, RH D314

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