| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001BZBY |
| Model Year Start: 2019 | Model: Avalon HV | Prod Date Range: [04/2018 - ] |
| Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): Front Power Seat does not Operate with Front Power Seat Switch; 2019 - 2022 MY Avalon HV [04/2018 - ] | ||
|
Front Power Seat does not Operate with Front Power Seat Switch |
DESCRIPTION
Signals are input into the position control ECU assembly. The built-in ECU manages the signals received from the power seat switch and operates each motor. If the position control ECU assembly receives more than 2 motor operation signals for the same motor, the motor will be stopped. Manual operation resumes when the position control ECU assembly receives only 1 signal.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK FRONT POWER SEAT OPERATION |
(a) Check that each function of the power seat operates normally by using the front power seat switch LH.
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![2019 - 2022 MY Avalon HV [04/2018 - ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): OPERATION CHECK](/t3Portal/stylegraphics/info.gif)
|
Result |
Proceed to |
|---|---|
|
All power seat functions do not operate |
A |
|
One or more power seat functions do not operate |
B |
| B |
|
GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate) |
|
|
2. |
INSPECT FRONT POWER SEAT SWITCH LH |
(a) Remove the front power seat switch LH.
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(b) Inspect the front power seat switch LH.
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| NG |
|
REPLACE FRONT POWER SEAT SWITCH LH
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - POWER SUPPLY) |
(a) Disconnect the R33 and R32 position control ECU assembly connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R33-3 (B) - Body ground |
Power switch off |
11 to 14 V |
|
R32-15 (SYSB) - Body ground |
Power switch off |
11 to 14 V |
|
R32-1 (IG) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
R32-1 (IG) - Body ground |
Power switch off |
Below 1 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R33-2 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R31-20 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POSITION CONTROL ECU ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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