Toyota Tundra (2015 year). Manual — part 2463
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z10-4 (SSRL) or Z4-4 - Body ground
Always
10 kΩ or higher
Z9-10 (LFT+) or Z4-1 - Body ground
Always
10 kΩ or higher
Z9-12 (LFT-) or Z4-2 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY
(a) Temporarily replace the position control ECU and switch assembly with a new or normally
functioning one
.
(b) Check the front power seat control system
.
OK:
Power seat operates normally.
NG
REPLACE FRONT SEAT CUSHION FRAME
SUB-ASSEMBLY LH
OK
END (POSITION CONTROL ECU AND SWITCH
ASSEMBLY WAS DEFECTIVE)
7.
READ VALUE USING TECHSTREAM (RECLINING)
(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
Reclining Rear
Reclining switch signal (Rearward) / ON
or OFF
ON: Reclining switch (Rearward)
on
OFF: Reclining switch
-
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
OK
OK
TESTER
DISPLAY
MEASUREMENT ITEM/RANGE
NORMAL CONDITION
DIAGNOSTIC
NOTE
(Rearward) off
Reclining Front
Reclining switch signal (Forward) / ON or
OFF
ON: Reclining switch (Forward)
on
OFF: Reclining 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
8.
INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY LH (RECLINING MOTOR)
.
(2) Inspect the front seatback frame sub-assembly LH (reclining motor)
.
NG
REPLACE FRONT SEATBACK FRAME SUB-ASSEMBLY
LH
9.
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH
ASSEMBLY - FRONT SEATBACK 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
Z10-11 (SSRR) - Z6-4
Always
Below 1 Ω
Z9-9 (RCL+) - Z6-2
Always
Below 1 Ω
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z9-11 (RCL-) - Z6-1
Always
Below 1 Ω
Z10-1 (SGND) - Z6-3
Always
Below 1 Ω
Z10-11 (SSRR) or Z6-4 - Body ground
Always
10 kΩ or higher
Z9-9 (RCL+) or Z6-2 - Body ground
Always
10 kΩ or higher
Z9-11 (RCL-) or Z6-1 - Body ground
Always
10 kΩ or higher
Z10-1 (SGND) or Z6-3 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
10.
CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY
(a) Temporarily replace the position control ECU and switch assembly with a new or normally
functioning one
.
(b) Check the front power seat control system
.
OK:
Power seat operates normally
NG
REPLACE FRONT SEATBACK FRAME SUB-ASSEMBLY
LH
OK
END (POSITION CONTROL ECU AND SWITCH
ASSEMBLY WAS DEFECTIVE)
11.
INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (LUMBAR MOTOR)
.
(2) Inspect the lumbar support adjuster assembly LH (lumbar motor)
.
NG
REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY
LH (LUMBAR MOTOR)
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
OK
OK
OK
12.
INSPECT FRONT POWER SEAT SWITCH LH (LUMBAR SUPPORT CONTROL)
.
(2) Inspect the front power seat switch LH (lumbar support control)
.
NG
REPLACE FRONT POWER SEAT SWITCH LH
13.
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH
ASSEMBLY - FRONT POWER SEAT SWITCH LH)
(a) Disconnect the Z9 position control ECU and switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Z9-6 (+B2) - Z2-5 (B)
Always
Below 1 Ω
Z9-1 (GND2) - Z2-2 (E)
Always
Below 1 Ω
Z9-6 (+B2) or Z2-5 (B) - Body ground
Always
10 kΩ or higher
Z9-1 (GND2) or Z2-2 (E) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
14.
CHECK HARNESS AND CONNECTOR (LUMBAR SUPPORT ADJUSTER ASSEMBLY LH -
FRONT POWER SEAT SWITCH LH)
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): One ...
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