Toyota Tundra (2015 year). Manual — part 2104
(a) Disconnect the DB ECU connector.
(b) Using a service wire, connect DB-18 (HRLY) and DB-16 (DIM)
on the wire harness side and body ground.
(c) Check that the headlight low beam illuminates.
OK:
Headlight low beam illuminates.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE MAIN BODY ECU
LIGHTING: LIGHTING SYSTEM: Headlight Signal Circuit; 2015 MY...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000002ZS002JX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit; 2015 MY Tundra [08/2014 - ]
Door Courtesy Switch Circuit
DESCRIPTION
The main body ECU receives a door open/closed signal from each door courtesy light switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1.
READ VALUE USING TECHSTREAM (DOOR COURTESY LIGHT SWITCH)
(a) Operate the Techstream according to the display and select the "Data List".
LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit; 201...
Main Body
TESTER DISPLAY
MEASUREMENT ITEM/RANGE
NORMAL CONDITION
DIAGNOSTIC
NOTE
D Door Courtesy
SW
Front door courtesy light switch LH
signal / ON or OFF
ON: Front door courtesy light
switch LH on
OFF: Front door courtesy light
switch LH off
-
P Door Courtesy
SW
Front door courtesy light switch RH
signal / ON or OFF
ON: Front door courtesy light
switch RH on
OFF: Front door courtesy light
switch RH off
-
RL Door
Courtesy SW
Rear door courtesy light switch LH signal
/ ON or OFF
ON: Rear door courtesy light
switch LH on
OFF: Rear door courtesy light
switch LH off
-
RR Door
Courtesy SW
Rear door courtesy light switch RH
signal / ON or OFF
ON: Rear door courtesy light
switch RH on
OFF: Rear door courtesy light
switch RH off
-
Result
RESULT
PROCEED TO
OK
A
NG (Front door courtesy light switch LH does not operate)
B
NG (Front door courtesy light switch RH does not operate)
C
NG (Rear door courtesy light switch LH does not operate)
D
NG (Rear door courtesy light switch RH does not operate)
E
B
GO TO STEP 2
C
GO TO STEP 4
D
GO TO STEP 6
E
GO TO STEP 8
A
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN
PROBLEM SYMPTOMS TABLE
2.
INSPECT FRONT DOOR COURTESY LIGHT SWITCH LH
LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit; 201...
OK
(a) Remove the front door courtesy light switch LH
.
(b) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER CONNECTION SWITCH CONDITION SPECIFIED CONDITION
1 - Body ground
Not pushed
Below 1 Ω
Pushed
10 kΩ or higher
NG
REPLACE FRONT DOOR COURTESY LIGHT SWITCH
LH
3.
CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH LH -
MAIN BODY ECU)
(a) Disconnect the P5 switch connector.
(b) Disconnect the J4 ECU connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
P5-1 - J4-24 (DCTY)
Always
Below 1 Ω
P5-1 - Body ground
Always
10 kΩ or higher
LIGHTING: LIGHTING SYSTEM: Door Courtesy Switch Circuit; 201...
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