Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2010RX 450H 3.5 BREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTSEATSFRONT POWER SEAT CONTROL (DIAGNOSTICS - INTRODUCTION)FRONT POWER SEAT CONTROL SYSTEM (W/ MEMORY)PROBLEM SYMPTOMS TABLE (FROM 8/2009)PROBLEM SYMPTOMS TABLE
2010 Lexus RX 450h 3.5 B
Problem Symptoms Table
2010 Lexus RX 450h 3.5 BSECTION Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
FRONT POWER SEAT CONTROL SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Front Power Seat does not Operate with Front Power Seat Switch. | CAN communication system | Refer to Front Power Seat does not Operate with Front Power Seat Switch |
| Front power seat switch LH | - | |
| Harness or connector | - | |
| One or more Power Seat Motors do not Operate. | CAN communication system | Refer to One or more Power Seat Motors do not Operate |
| Front seat assembly LH | - | |
| Front power seat switch LH | - | |
| Harness or connector | - | |
| Variable Cushion Function does not Operate (w/ Variable Cushion Function) | Seat variable cushion switch | Refer to INSPECTION - Step 1 |
| Seat variable cushion motor | Refer to INSPECTION - Step 1 | |
| Harness or connector | - | |
| Power Seat Position is not Memorized. | CAN communication system | Refer to Power Seat Position is not Memorized |
| Front power seat switch LH | - | |
| Outer mirror control ECU assembly (driver side) | - | |
| Main body ECU (multiplex network body ECU) | - | |
| Seat memory switch | - | |
| Harness or connector | - | |
| Power Seat does not Return to Memorized Position. | CAN communication system | Refer to Power Seat does not Return to Memorized Position |
| Hybrid control system | - | |
| Front seat assembly LH | - | |
| Front power seat switch LH | - | |
| Main body ECU (multiplex network body ECU) | - | |
| Outer mirror control ECU assembly (driver side) | - | |
| Seat memory switch | - | |
| Harness or connector | - | |
| Wireless Transmitter Memory Function does not Operate. | CAN communication system | Refer to Wireless Transmitter Memory Function does not Operate |
| LIN communication system | - | |
| Power door lock control system | - | |
| Lighting system | - | |
| Smart access system with push-button start | - | |
| Seat memory switch | - | |
| Outer mirror control ECU assembly (driver side) | - | |
| Front power seat switch LH | - | |
| Main body ECU (multiplex network body ECU) | - | |
| Certification ECU (smart key ECU assembly) | - | |
| Harness or connector | - | |
| Wireless-linked Return Function does not Operate. | CAN communication system | Refer to Wireless-linked Return Function does not Operate |
| Wireless door lock control system | - | |
| Lighting system | - | |
| Smart access system with push-button start | - | |
| Main body ECU (multiplex network body ECU) | - | |
| Front power seat switch LH | - | |
| Certification ECU (smart key ECU assembly) | - | |
| Power Seat Power Easy Access System Function does not Operate. | CAN communication system | Refer to Power Seat Power Easy Access System Function does not Operate |
| Front power seat switch LH | - | |
| Main body ECU (multiplex network body ECU) | - | |
| Front seat inner belt assembly LH | - | |
| Harness or connector | - |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.