Toyota Tundra (2015 year). Manual — part 2462
INSPECTION PROCEDURE
PROCEDURE
1.
CHECK FRONT POWER SEAT OPERATION
(a) Check which power seat functions are malfunctioning.
Result
RESULT
PROCEED TO
One or more power seat functions do not operate
A
All power seat functions do not operate
B
B
GO to OTHER FLOW CHART (Front Power Seat does
not Operate with Front Power Seat Switch)
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
A
A
2.
CHECK FRONT POWER SEAT OPERATION
.
Result
RESULT
PROCEED TO
Slide, front vertical and lifter functions do not operate
A
Reclining functions do not operate
B
Lumbar support adjustment function does not operate
C
Leg support function does not operate
D
B
GO TO STEP 7
C
GO TO STEP 11
D
GO TO STEP 15
3.
READ VALUE USING TECHSTREAM (SLIDE, LIFTER, FRONT VERTICAL)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Driver Seat / Data List.
(e) Read the Data List according to the display on the Techstream.
Driver Seat
TESTER
DISPLAY
MEASUREMENT ITEM/RANGE
NORMAL CONDITION
DIAGNOSTIC
NOTE
Front Vertical
Down
Front vertical switch signal (Downward) /
ON or OFF
ON: Front vertical switch
(Downward) on
-
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
OK
TESTER
DISPLAY
MEASUREMENT ITEM/RANGE
NORMAL CONDITION
DIAGNOSTIC
NOTE
OFF: Front vertical switch
(Downward) off
Front Vertical
Up
Front vertical switch signal (Upward) /
ON or OFF
ON: Front vertical switch
(Upward) on
OFF: Front vertical switch
(Upward) off
-
Lifter Switch
Down
Lifter switch signal (Downward) / ON or
OFF
ON: Lifter switch (Downward) on
OFF: Lifter switch (Downward)
off
-
Lifter Switch Up
Lifter switch signal (Upward) / ON or OFF
ON: Lifter switch (Upward) on
OFF: Lifter switch (Upward) off
-
Slide Rear
Sliding switch signal (Rearward) / ON or
OFF
ON: Sliding switch (Rearward) on
OFF: Sliding switch (Rearward)
off
-
Slide Front
Sliding switch signal (Forward) / ON or
OFF
ON: Sliding switch (Forward) on
OFF: Sliding switch (Forward) off
-
OK:
ON or OFF is displayed on the Techstream according to the table above.
NG
REPLACE POSITION CONTROL ECU AND SWITCH
ASSEMBLY
4.
INSPECT FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH (SLIDE, LIFTER,
VERTICAL MOTOR)
.
(2) Inspect the front seat cushion frame sub-assembly LH (slide motor)
.
.
(2) Inspect the front seat cushion frame sub-assembly LH (lifter motor)
.
.
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
OK
(2) Inspect the front seat cushion frame sub-assembly LH (vertical motor)
.
NG
REPLACE FRONT SEAT CUSHION FRAME
SUB-ASSEMBLY LH
5.
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH
ASSEMBLY - FRONT SEAT CUSHION FRAME SUB-ASSEMBLY LH)
(a) Disconnect the Z9 and Z10 position control ECU and switch assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z10-5 (SSRS) - Z3-5
Always
Below 1 Ω
Z9-3 (SLD+) - Z3-4
Always
Below 1 Ω
Z9-4 (SLD-) - Z3-3
Always
Below 1 Ω
Z10-1 (SGND) - Z3-6
Always
Below 1 Ω
Z10-3 (SSFV) - Z14-2
Always
Below 1 Ω
Z9-8 (FRV+) - Z5-2
Always
Below 1 Ω
Z9-5 (FRV-) - Z5-1
Always
Below 1 Ω
Z10-1 (SGND) - Z14-1
Always
Below 1 Ω
Z10-4 (SSRL) - Z4-4
Always
Below 1 Ω
Z9-10 (LFT+) - Z4-1
Always
Below 1 Ω
Z9-12 (LFT-) - Z4-2
Always
Below 1 Ω
Z10-1 (SGND) - Z4-3
Always
Below 1 Ω
Z10-5 (SSRS) or Z3-5 - Body ground
Always
10 kΩ or higher
Z9-3 (SLD+) or Z3-4 - Body ground
Always
10 kΩ or higher
Z9-4 (SLD-) or Z3-3 - Body ground
Always
10 kΩ or higher
Z10-1 (SGND) or Z3-6 - Body ground
Always
10 kΩ or higher
Z10-1 (SGND) or Z14-1 - Body ground
Always
10 kΩ or higher
Z10-1 (SGND) or Z4-3 - Body ground
Always
10 kΩ or higher
Z10-3 (SSFV) or Z14-2 - Body ground
Always
10 kΩ or higher
Z9-8 (FRV+) or Z5-2 - Body ground
Always
10 kΩ or higher
Z9-5 (FRV-) or Z5-1 - Body ground
Always
10 kΩ or higher
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
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