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.
2011 Lexus LS 460 AWDFACTORY OEM SERVICE PROCEDURE
Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptom. 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 the system before inspecting the suspected areas below.
POWER WINDOW CONTROL SYSTEM:
| Symptom | Suspected Area | See |
|---|---|---|
| Remote UP / DOWN function does not operate | LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| CAN communication system | Refer to PRECAUTION | |
| Multiplex network master switch assembly | Refer to Remote Up / Down Function does not Operate | |
| Driver side power window does not operate with power window master switch | D DOOR 1 fuse | - |
| D DOOR 2 fuse | - | |
| D-IG1-3 fuse | - | |
| D MPX-B 1 fuse | - | |
| D-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Multiplex network master switch assembly | Refer to Driver Side Power Window does not Operate with Power Window Master Switch | |
| Front power window regulator motor assembly LH | Refer to Driver Side Power Window does not Operate with Power Window Master Switch | |
| Wire harness | Refer to Driver Side Power Window does not Operate with Power Window Master Switch | |
| Front passenger side power window does not operate with power window regulator switch | P DOOR 1 fuse | - |
| P DOOR 2 fuse | - | |
| P-IG1-1 fuse | - | |
| P MPX-B fuse | - | |
| P-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Front power window regulator switch assembly RH | Refer to Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch | |
| Front power window regulator motor assembly RH | Refer to Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch | |
| Harness or connector | Refer to Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch | |
| Rear power window LH does not operate with power window regulator switch | D RR DOOR fuse | - |
| RR-IG1-2 fuse | - | |
| RR MPX-B 2 fuse | - | |
| RR-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Rear power window regulator switch assembly LH | Refer to Rear Power Window LH does not Operate with Rear Power Window Switch LH | |
| Rear power window regulator motor assembly LH | Refer to Rear Power Window LH does not Operate with Rear Power Window Switch LH | |
| Harness or connector | Refer to Rear Power Window LH does not Operate with Rear Power Window Switch LH | |
| Rear power window RH does not operate with power window regulator switch | P RR DOOR fuse | - |
| RR-IG1-1 fuse | - | |
| P MPX-B fuse | - | |
| RR-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Rear power window regulator switch assembly RH | Refer to Rear Power Window RH does not Operate with Rear Power Window Switch RH | |
| Rear power window regulator motor assembly RH | Refer to Rear Power Window RH does not Operate with Rear Power Window Switch RH | |
| Harness or connector | Refer to Rear Power Window RH does not Operate with Rear Power Window Switch RH | |
| Driver side power window AUTO UP / DOWN function does not operate | D DOOR 1 fuse | - |
| D DOOR 2 fuse | - | |
| D-IG1-3 fuse | - | |
| D MPX-B 1 fuse | - | |
| D-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Multiplex network master switch assembly | Refer to Driver Side Power Window Auto Up / Down Function does not Operate with Power Window Master Switch | |
| Front power window regulator motor assembly LH | Refer to Driver Side Power Window Auto Up / Down Function does not Operate with Power Window Master Switch | |
| Harness or connector | Refer to Driver Side Power Window Auto Up / Down Function does not Operate with Power Window Master Switch | |
| Front passenger side power window AUTO UP / DOWN function does not operate | P DOOR 1 fuse | - |
| P DOOR 2 fuse | - | |
| P-IG1-1 fuse | - | |
| P MPX-B fuse | - | |
| P-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Front power window regulator switch assembly RH | Refer to Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch | |
| Front power window regulator motor assembly RH | Refer to Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch | |
| Harness or connector | Refer to Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch | |
| Rear power window LH AUTO UP / DOWN function does not operate | D RR DOOR fuse | - |
| RR-IG1-2 fuse | - | |
| RR MPX-B 2 fuse | - | |
| RR-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Rear power window regulator switch assembly LH | Refer to Rear Power Window LH Auto Up / Down Function does not Operate with Rear Power Window Switch LH | |
| Rear power window regulator motor assembly LH | Refer to Rear Power Window LH Auto Up / Down Function does not Operate with Rear Power Window Switch LH | |
| Harness or connector | Refer to Rear Power Window LH Auto Up / Down Function does not Operate with Rear Power Window Switch LH | |
| Rear power window RH AUTO UP / DOWN function does not operate | P RR DOOR fuse | - |
| RR-IG1-1 fuse | - | |
| P MPX-B fuse | - | |
| RR-IG1 relay | - | |
| LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Rear power window regulator switch assembly RH | Refer to Rear Power Window RH Auto Up / Down Function does not Operate with Rear Power Window Switch RH | |
| Rear power window regulator motor assembly RH | Refer to Rear Power Window RH Auto Up / Down Function does not Operate with Rear Power Window Switch RH | |
| Harness or connector | Refer to Rear Power Window RH Auto Up / Down Function does not Operate with Rear Power Window Switch RH | |
| All power windows do not operate with driver side door key cylinder or wireless transmitter | Wireless door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Power door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Main body ECU (driver side junction block) | Refer to All Power Windows do not Operate with Driver Side Door Key Cylinder or Wireless Transmitter | |
| Key-off operation function operates even if operating conditions are not satisfied | LIN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Front door courtesy light switch | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Main body ECU (driver side junction block) | Refer to Key-off Operation Function Operates even if Operating Conditions are not Satisfied | |
| AUTO UP operation does not fully close power window (jam protection is activated) | Glass position initialization | Refer to Auto Up Operation does not Fully Close Power Window (Jam Protection Function is Activated) |
| Improper installation (door glass run) | Refer to Auto Up Operation does not Fully Close Power Window (Jam Protection Function is Activated) | |
| Power window regulator motor assembly (applicable location) | Refer to Auto Up Operation does not Fully Close Power Window (Jam Protection Function is Activated) | |
| Jam protection function does not operate | Glass position initialization | Refer to Jam Protection Function does not Operate |
| Power window regulator motor assembly (applicable location) | Refer to Jam Protection Function does not Operate | |
| Harness or connector | Refer to Jam Protection Function does not Operate | |
| All power window UP functions do not operate with entry lock switch | Entry lock and unlock switch | Refer to All Power Window Up Functions do not Operate with Entry Lock Switch |
| Main body ECU (driver side junction block) | Refer to All Power Window Up Functions do not Operate with Entry Lock Switch | |
| AUTO DOWN operation does not fully open power window | Glass position initialization | Refer to PROCEDURE - Step 2 |
Factory Service Tools
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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.