Toyota Venza: One or more Power Seat Motors do not Operate
DESCRIPTION
Signals are input into the position control ECU and switch assembly. The built-in ECU manages the signals received from the position control ECU and switch assembly, and operates each motor. If the position control ECU and switch assembly receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the position control ECU and switch assembly receives 1 signal only.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(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 (Rearward) off |
- |
|
Reclining Front |
Reclining switch signal (Forward) / ON or OFF |
ON: Reclining switch (Forward) on OFF: Reclining switch (Forward) off |
- |
|
Front Vertical Down |
Front vertical switch signal (Downward) / ON or OFF |
ON: Front vertical switch (Downward) on 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 | .gif) |
GO TO STEP 5 |
|
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|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Enter the following menus: Body Electrical / Driver Seat / Active Test.
(b) Perform the Active Test according to the display on the Techstream.
Driver Seat|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Seat Reclining |
Seat reclining operation |
OFF/Front/Rear |
- |
|
Front Vertical Operation |
Seat front vertical operation |
OFF/Up/Down |
- |
|
Lifter Operation |
Seat lifter operation |
OFF/Up/Down |
- |
|
Seat Slide Operation |
Seat sliding operation |
OFF/Front/Rear |
- |
OK:
The power seat motors operate normally.
| OK | |
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY |
|
|
3. |
INSPECT FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH |
|
(a) Remove the front seat frame with adjuster assembly LH (See page
|
|
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(b) Check operation of the slide motor.
(1) Check if the seat moves smoothly when the battery is connected to the slide motor connector terminals.
OK:
|
Condition |
Specified Condition |
|---|---|
|
Battery positive (+) → Terminal 3 Battery negative (-) → Terminal 4 |
Forward |
|
Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 3 |
Rearward |
|
*a |
Component without harness connected (Slide Motor (Front Seat Frame with Adjuster Assembly LH)) |
|
(c) Check operation of the front vertical motor. (1) Check if the seat moves smoothly when the battery is connected to the front vertical motor connector terminals. OK:
|
|
|
(d) Check operation of the lifter motor. (1) Check if the seat moves smoothly when the battery is connected to the lifter motor connector terminals. OK:
|
|
|
(e) Check operation of the reclining motor. (1) Check if the seat moves smoothly when the battery is connected to the reclining motor connector terminals. OK:
|
|
| NG | |
REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH |
|
|
4. |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - POWER SEAT MOTOR) |
(a) Disconnect the T10 the 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 |
|---|---|---|
|
T10-2 (SLD+) - T12-3 (FWD) |
Always |
Below 1 Ω |
|
T10-4 (SLD-) - T12-4 (BACK) |
Always |
Below 1 Ω |
|
T10-5 (FRV-) - T2-2 |
Always |
Below 1 Ω |
|
T10-7 (FRV+) - T2-1 |
Always |
Below 1 Ω |
|
T10-8 (LFT+) - T3-2 |
Always |
Below 1 Ω |
|
T10-11 (LFT-) - T3-1 |
Always |
Below 1 Ω |
|
T10-9 (RCL+) - T4-2 |
Always |
Below 1 Ω |
|
T10-12 (RCL-) - T4-1 |
Always |
Below 1 Ω |
|
T10-2 (SLD+) - Body ground |
Always |
10 kΩ or higher |
|
T10-4 (SLD-) - Body ground |
Always |
10 kΩ or higher |
|
T10-5 (FRV-) - Body ground |
Always |
10 kΩ or higher |
|
T10-7 (FRV+) - Body ground |
Always |
10 kΩ or higher |
|
T10-8 (LFT+) - Body ground |
Always |
10 kΩ or higher |
|
T10-11 (LFT-) - Body ground |
Always |
10 kΩ or higher |
|
T10-9 (RCL+) - Body ground |
Always |
10 kΩ or higher |
|
T10-12 (RCL-) - Body ground |
Always |
10 kΩ or higher |
| OK | |
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (BATTERY - POSITION CONTROL ECU AND SWITCH ASSEMBLY - BODY GROUND) |
(a) Disconnect the T11 the position control ECU and switch assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T11-12 (SYSB) - Body ground |
Always |
11 to 14 V |
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T10-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK | |
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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DESCRIPTION
Signals are input into the position control ECU and switch assembly. The built-in
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Removal
REMOVAL
PROCEDURE
1. REMOVE REAR WHEELS
2. REMOVE CENTER EXHAUST PIPE ASSEMBLY
(a) Remove the center exhaust pipe assembly.
HINT:
Refer to the instructions for Removal of the exhaust pipe (See page
for 2GR-FE,
for 1AR-FE).
3. REMOVE PROPELLER WITH ...
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