Toyota Tundra (2015 year). Manual — part 2088
SYMPTOM
SUSPECTED AREA
SEE
PAGE
Cargo light circuit
Harness or connector
Main body ECU
Room light does not operate
Room light
Harness or connector
Transfer control switch illumination does not operate (for 4WD)
PANEL fuse
Transfer control switch
Harness or connector
Steering pad switch illumination does not operate
PANEL fuse
Steering pad switch
Harness or connector
Room light switch illumination does not operate
PANEL fuse
Room light switch
Harness or connector
Cargo light switch illumination does not operate
PANEL fuse
Cargo light switch
Harness or connector
Traction control switch illumination does not operate
PANEL fuse
Traction control switch
Harness or connector
Transmission control switch illumination does not operate
PANEL fuse
Transmission control switch (for
Column Shift Type)
Transmission control switch (for
Floor Shift Type)
Harness or connector
Air conditioning control illumination does not operate
TURN-HAZ fuse
Air Conditioning control
Harness or connector
Warning canceling switch illumination does not operate (w/ Blind
Spot Monitor System)
PANEL fuse
Warning Canceling switch
Harness or connector
Back sonar or clearance sonar switch illumination does not
PANEL fuse
LIGHTING: LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE;...
SYMPTOM
SUSPECTED AREA
SEE
PAGE
operate (w/ Intuitive Parking Assist System)
Back sonar or clearance sonar
switch
Harness or connector
Pattern select switch illumination does not operate
PANEL fuse
Pattern select switch
-
Harness or connector
Outer mirror light does not operate (for Standard)
TAIL fuse
Outer mirror light
Main body ECU
Harness or connector
Battery saving control system
SYMPTOM
SUSPECTED AREA
SEE PAGE
Battery saving function (interior light auto cut function) does not operate
DOME relay
Main body ECU
Harness or connector
LIGHTING: LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE;...
Last Modified: 9-16-2014
6.6 U
Doc ID: RM000002WKN017X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: LIGHTING: LIGHTING SYSTEM: TERMINALS OF ECU; 2015 MY Tundra [08/2014 - ]
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)
(a) Disconnect the J3, J4, DA, DB and DC ECU connectors.
LIGHTING: LIGHTING SYSTEM: TERMINALS OF ECU; 2015 MY ...
(b) Measure the voltage and resistance according to the value(s) in the table below.
TERMINAL NO.
(SYMBOLS)
WIRING
COLOR
TERMINAL DESCRIPTION
CONDITION
SPECIFIED
CONDITION
DB-13 (BECU) -
Body ground
GR - Body
ground
BECU power supply
Always
11 to 14 V
DA-1 (ACC) -
Body ground
B - Body
ground
ACC power supply
Always
11 to 14 V
DA-1 (IG) - Body
ground
B - Body
ground
IG power supply
Always
11 to 14 V
DA-1 (TRLY) -
Body ground
B - Body
ground
Taillight power supply
Always
11 to 14 V
DB-21 (GND1) -
Body ground
B - Body
ground
Body ground
Always
Below 1 Ω
DB-21 (GND2) -
Body ground
B - Body
ground
Body ground
Always
Below 1 Ω
J4-24 (DCTY) -
Body ground
GR - Body
ground
Front door courtesy light
switch LH signal
Front door LH open
Below 1 Ω
J4-24 (DCTY) -
Body ground
GR - Body
ground
Front door courtesy light
switch LH signal
Front door LH closed
10 kΩ or higher
J3-3 (DOMR) -
Body ground
P - Body
ground
Battery saving control
(interior light auto cut
function) signal
Battery saving control (interior
light auto cut function)
operating
11 to 14 V
J3-3 (DOMR) -
Body ground
P - Body
ground
Battery saving control
(interior light auto cut
function) signal
Battery saving control (interior
light auto cut function) not
operating
Below 1 Ω
J3-15 (DOMR) -
Body ground
B - Body
ground
Battery saving control
(interior light auto cut
function) signal
Battery saving control (interior
light auto cut function)
operating
11 to 14 V
J3-15 (DOMR) -
Body ground
B - Body
ground
Battery saving control
(interior light auto cut
function) signal
Battery saving control (interior
light auto cut function) not
operating
Below 1 Ω
J3-21 (PCTY) -
Body ground
W - Body
ground
Front door courtesy light
switch RH signal
Front door RH open
Below 1 Ω
J3-21 (PCTY) -
Body ground
W - Body
ground
Front door courtesy light
switch RH signal
Front door RH closed
10 kΩ or higher
DC-2 (LCTY) -
Body ground
B - Body
ground
Rear door courtesy light
switch LH signal
Rear door LH open
Below 1 Ω
DC-2 (LCTY) -
Body ground
B - Body
ground
Rear door courtesy light
switch LH signal
Rear door LH closed
10 kΩ or higher
J3-25 (RRCY) -
Body ground
L - Body
ground
Rear door courtesy light
switch RH signal
Rear door RH open
Below 1 Ω
J3-25 (RRCY) -
Body ground
L - Body
ground
Rear door courtesy light
switch RH signal
Rear door RH closed
10 kΩ or higher
LIGHTING: LIGHTING SYSTEM: TERMINALS OF ECU; 2015 MY ...
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