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.
Diagnostic Trouble Code Chart
2010 Lexus RX 450h 3.5 BSECTION Diagnostic Trouble Code Chart
NAVIGATION SYSTEM
| DTC Code | Detection Item | Trouble Area | See |
|---|---|---|---|
| B1563 | Remote Touch Disconnected | 1. Remote touch power source circuit 2. MOST circuit between display and navigation module display and remote touch 3. MOST circuit between remote touch and radio receiver assembly 4. Remote touch (remote operation board) 5. Display and navigation module display |
Refer to DTC B1596: No Response from Remote Touch; DTC B1563: Remote Touch Disconnected |
| B1567 | Head Up Display Disconnected | 1. Combination meter mirror ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and combination meter mirror ECU 3. Combination meter mirror ECU 4. Display and navigation module display |
Refer to DTC B159C: No Response from Head Up Display; DTC B1567: Head Up Display Disconnected |
| B156B | Multi-media Interface ECU Disconnected | 1. Multi-media interface ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and multi-media interface ECU 3. Multi-media interface ECU 4. Display and navigation module display |
Refer to DTC B156E: No Response from Multi-media Interface ECU; DTC B156B: Multi-media Interface ECU Disconnected |
| B156E | No Response from Multi-media Interface ECU | 1. Multi-media interface ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and multi-media interface ECU 3. Multi-media interface ECU 4. Display and navigation module display |
Refer to DTC B156E: No Response from Multi-media Interface ECU; DTC B156B: Multi-media Interface ECU Disconnected |
| B1581 | Remote Touch Initializing Malfunction | Remote touch (remote operation board) | Refer to DTC B1581: Remote Touch Initializing Malfunction |
| B1591 | No Response from Audio HU | 1. Radio receiver assembly power source circuit 2. MOST circuit between remote touch and radio receiver assembly 3. MOST circuit between radio receiver assembly and stereo component amplifier assembly 4. Radio receiver assembly 5. Display and navigation module display |
Refer to DTC B1591: No Response from Audio HU; DTC B15D1: Audio HU Disconnected |
| B1593 | No Response from Stereo Component Amplifier | 1. Stereo component amplifier assembly power source circuit 2. MOST circuit between radio receiver assembly and stereo component amplifier assembly 3. MOST circuit between stereo component amplifier assembly and display and navigation module display (w/o Rear Seat Entertainment System) 4. MOST circuit between stereo component amplifier assembly and multi-display controller sub-assembly (w/ Rear Seat Entertainment System) 5. Stereo component amplifier assembly 6. Display and navigation module display |
Refer to DTC B1593: No Response from Stereo Component Amplifier; DTC B15D3: Stereo Component Amplifier Disconnected |
| B1595 | No Response from Rear Seat Entertainment System | 1. Multi-display controller sub-assembly power source circuit 2. MOST circuit between stereo component amplifier assembly and multi-display controller sub-assembly 3. MOST circuit between multi-display controller sub-assembly and display and navigation module display 4. Multi-display controller sub-assembly 5. Display and navigation module display |
Refer to DTC B1595: No Response from Rear Seat Entertainment System; DTC B15D5: Rear Seat Entertainment System Disconnected |
| B1596 | No Response from Remote Touch | 1. Remote touch power source circuit 2. MOST circuit between display and navigation module display and remote touch 3. MOST circuit between remote touch and radio receiver assembly 4. Remote touch (remote operation board) 5. Display and navigation module display |
Refer to DTC B1596: No Response from Remote Touch; DTC B1563: Remote Touch Disconnected |
| B1597 | No Response from Display | 1. Multi-display assembly power source circuit 2. AVC-LAN circuit between display and navigation module display and multi-display assembly 3. Multi-display assembly 4. Display and navigation module display |
Refer to DTC B1597: No Response from Display; DTC B15D6: Display Disconnected |
| B159C | No Response from Head Up Display | 1. Combination meter mirror ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and combination meter mirror ECU 3. Combination meter mirror ECU 4. Display and navigation module display |
Refer to DTC B159C: No Response from Head Up Display; DTC B1567: Head Up Display Disconnected |
| B159D | No Response from Operation Panel | 1. Radio receiver assembly (A/C control panel) power source circuit 2. AVC-LAN circuit between display and navigation module display and radio receiver assembly (A/C control panel) 3. Radio receiver assembly 4. Multi-media interface ECU 5. Display and navigation module display |
Refer to DTC B159D: No Response from Operation Panel; DTC B15D9: Operation Panel Disconnected |
| B15A0 | LAN Master Malfunction | Display and navigation module display | Refer to DTC B15A0: LAN Master Malfunction; DTC B15AD: Navigation Processor Malfunction |
| B15A6 | Display Malfunction | Multi-display assembly | Refer to DTC B15A6: Display Malfunction |
| B15AB | Operation Panel Malfunction | Radio receiver assembly | Refer to DTC B15AB: Operation Panel Malfunction |
| B15AD | Navigation Processor Malfunction | Display and navigation module display | Refer to DTC B15A0: LAN Master Malfunction; DTC B15AD: Navigation Processor Malfunction |
| B15AF | Remote Touch Malfunction | Remote touch (remote operation board) | Refer to DTC B15AF: Remote Touch Malfunction |
| B15B0 | Display Screen Malfunction | 1. Display and navigation module display 2. Rear seat entertainment system |
Refer to DTC B15B0: Display Screen Malfunction |
| B15B8 | Harddisk Malfunction | Hard disk drive | Refer to DTC B15B8: Harddisk Malfunction |
| B15C0 | Short in GPS Antenna | 1. Wire harness 2. Navigation antenna assembly 3. Display and navigation module display |
Refer to DTC B15C0: Short in GPS Antenna; DTC B15C1: Open in GPS Antenna |
| B15C1 | Open in GPS Antenna | 1. Wire harness 2. Navigation antenna assembly 3. Display and navigation module display |
Refer to DTC B15C0: Short in GPS Antenna; DTC B15C1: Open in GPS Antenna |
| B15C2 | Speed Signal Malfunction | 1. Combination meter assembly 2. Display and navigation module display 3. Wire harness or connector 4. Junction block |
Refer to DTC B15C2: Speed Signal Malfunction |
| B15D0 | MOST Communication Malfunction | 1. Speaker circuit (for 15 speakers) 2. MOST line check 3. MOST communication line connector 4. MOST communication line 5. Remote touch 6. Radio receiver assembly 7. Stereo component amplifier assembly 8. Multi-display controller sub-assembly (w/ Rear Seat Entertainment System) 9. Display and navigation module display |
Refer to DTC B15D0: MOST Communication Malfunction |
| B15D1 | Audio HU Disconnected | 1. Radio receiver assembly power source circuit 2. MOST circuit between remote touch and radio receiver assembly 3. MOST circuit between radio receiver assembly and stereo component amplifier assembly 4. Radio receiver assembly 5. Display and navigation module display |
Refer to DTC B1591: No Response from Audio HU; DTC B15D1: Audio HU Disconnected |
| B15D3 | Stereo Component Amplifier Disconnected | 1. Stereo component amplifier assembly power source circuit 2. MOST circuit between radio receiver assembly and stereo component amplifier assembly 3. MOST circuit between stereo component amplifier assembly and display and navigation module display (w/o Rear Seat Entertainment System) 4. MOST circuit between stereo component amplifier assembly and multi-display controller sub-assembly (w/ Rear Seat Entertainment System) 5. Stereo component amplifier assembly 6. Display and navigation module display |
Refer to DTC B1593: No Response from Stereo Component Amplifier; DTC B15D3: Stereo Component Amplifier Disconnected |
| B15D5 | Rear Seat Entertainment System Disconnected | 1. Multi-display controller sub-assembly power source circuit 2. MOST circuit between stereo component amplifier assembly and multi-display controller sub-assembly 3. MOST circuit between multi-display controller sub-assembly and display and navigation module display 4. Multi-display controller sub-assembly 5. Display and navigation module display |
Refer to DTC B1595: No Response from Rear Seat Entertainment System; DTC B15D5: Rear Seat Entertainment System Disconnected |
| B15D6 | Display Disconnected | 1. Multi-display assembly power source circuit 2. AVC-LAN circuit between display and navigation module display and multi-display assembly 3. Multi-display assembly 4. Display and navigation module display |
Refer to DTC B1597: No Response from Display; DTC B15D6: Display Disconnected |
| B15D8 | Monitor Disconnected | 1. Parking assist ECU power source circuit 2. AVC-LAN circuit between display and navigation module display and parking assist ECU 3. Parking assist ECU 4. Display and navigation module display |
Refer to DTC B15D8: Monitor Disconnected |
| B15D9 | Operation Panel Disconnected | 1. Radio receiver assembly (A/C control panel) power source circuit 2. AVC-LAN circuit between display and navigation module display and radio receiver assembly (A/C control panel) 3. Radio receiver assembly 4. Multi-media interface ECU 5. Display and navigation module display |
Refer to DTC B159D: No Response from Operation Panel; DTC B15D9: Operation Panel Disconnected |
| B15E7 | Harddisk Reading/Writing Malfunction(Low Temperature) | Hard disk drive | Refer to DTC B15E7: Harddisk Reading/Writing Malfunction(Low Temperature); DTC B15E8: Harddisk Reading/Writing Malfunction(High Temperature) |
| B15E8 | Harddisk Reading/Writing Malfunction(High Temperature) | Hard disk drive | Refer to DTC B15E7: Harddisk Reading/Writing Malfunction(Low Temperature); DTC B15E8: Harddisk Reading/Writing Malfunction(High Temperature) |
| B15F5 | A/C ECU Vehicle Information Reading/Writing Processor Malfunction | 1. CAN communication system 2. Air conditioning system 3. A/C ECU (air conditioning amplifier assembly) 4. Display and navigation module display |
Refer to DTC B15F5: A/C ECU Vehicle Information Reading/Writing Processor Malfunction |
| B15F6 | Main Body ECU Vehicle Information Reading/Writing Process Malfunction | 1. CAN communication system 2. Power door lock control system 3. Wireless door lock control system 4. Lighting system (for interior) 5. Lighting system (for exterior) 6. Front power seat control system (w/ Memory) 7. Main body ECU (multiplex network body ECU) 8. Display and navigation module display |
Refer to DTC B15F6: Main Body ECU Vehicle Information Reading/Writing Process Malfunction |
| B15F7 | Certification ECU Vehicle Information Reading/Writing Process Malfunction | 1. CAN communication system 2. Smart access system with push-button start (for Entry Function) 3. Smart access system with push-button start (for Start Function) 4. Certification ECU (smart key ECU assembly) 5. Display and navigation module display |
Refer to DTC B15F7: Certification ECU Vehicle Information Reading/Writing Process Malfunction |
| U0073 | Control Module Communication Bus Off | CAN communication system | Refer to DTC U0073: Control Module Communication Bus Off; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with HV ECU; DTC U1110: Lost Communication with Clearance Warning ECU |
| U0155 | Lost Communication with Combination Meter | CAN communication system | Refer to DTC U0073: Control Module Communication Bus Off; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with HV ECU; DTC U1110: Lost Communication with Clearance Warning ECU |
| U0164 | Lost Communication with A/C ECU | CAN communication system | Refer to DTC U0073: Control Module Communication Bus Off; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with HV ECU; DTC U1110: Lost Communication with Clearance Warning ECU |
| U0293 | Lost Communication with HV ECU | CAN communication system | Refer to DTC U0073: Control Module Communication Bus Off; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with HV ECU; DTC U1110: Lost Communication with Clearance Warning ECU |
| U1110 | Lost Communication with Clearance Warning ECU | CAN communication system | Refer to DTC U0073: Control Module Communication Bus Off; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with HV ECU; DTC U1110: Lost Communication with Clearance Warning ECU |
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.