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.
2020 Toyota Avalon XLEFACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2020 Toyota Avalon Limited), but are still accessible from a link in your vehicle's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle.
- Different variant/trim
- Section 1 (Pre-Collision System - Diagnostics - Introduction (Hybrid))
- Section 2 (Parking Assist Monitor System - Diagnostics - Introduction (Hybrid))
- Section 3 (Panoramic View Monitor System - Diagnostics - Introduction (Hybrid))
- Section 4 (Electronically Controlled Brake System - Diagnostics - Introduction (1 Of 2) (Hybrid))
- Section 5 (Dynamic Radar Cruise Control System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 6 (Lighting System (W/ Cornering Light) - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 7 (Lighting System (W/O Cornering Light) - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 8 (Supplemental Restraint System - Diagnostics - Introduction (Hybrid))
- Section 9 (Dynamic Radar Cruise Control System - Diagnostics - Introduction (Hybrid))
- Section 10 (Charging System - Diagnostic Codes [A25A-FXS])
- Section 11 (Battery / Charging System (Service Information) [A25A-FXS])
- Section 12 (Navigation System - Diagnostics - Introduction (Hybrid))
- Section 13 (Audio / Video System - Diagnostics - Introduction (Hybrid))
- Section 14 (Can Communication System - Diagnostics - Introduction (Hybrid) (1 Of 7))
- Section 15 (Smart Key System (Keyless Start) - Diagnostics - Introduction (Hybrid))
- Section 16 (Smart Key System (Keyless Entry) - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 17 (Smart Key System (Keyless Entry) - Diagnostics - Introduction (Hybrid))
- Section 18 (Wireless Door Lock Control System - Diagnostics - Introduction (Hybrid))
- Section 19 (Tire Pressure Warning System - Diagnostics - Introduction (Hybrid))
- Section 20 (Lighting System (Interior) - Diagnostics & Circuit Tests (Hybrid))
- Section 21 (Power Door Lock Control System - Diagnostics - Introduction (Hybrid))
- Section 22 (Meter / Gauge / Display - Diagnostics - Introduction (Hybrid))
- Section 23 (Wireless Door Lock Control System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 24 (Audio / Video System - Inspection (Hybrid))
- Section 25 (Navigation System (Inspection) (Hybrid))
- Section 26 (Power Window Control System - Diagnostics - Introduction (Hybrid))
- Section 27 (Occupant Classification System - Diagnostics - Introduction (Hybrid))
- Section 28 (Front Camera System - Diagnostic Codes (Hybrid))
- Section 29 (Lane Departure Alert System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 30 (Can Communication System - Diagnostics - Introduction (Hybrid) (3 Of 7))
- Section 31 (Pre-Collision System - Diagnostic Codes (Hybrid))
- Section 32 (Power Steering System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 33 (Power Steering System - Diagnostics - Introduction (Hybrid))
- Section 34 (Electronically Controlled Brake System - Diagnostics - Introduction (2 Of 2) (Hybrid))
- Section 35 (Fuel System (Service Information) [A25A-FXS])
- Section 36 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (1 Of 4))
- Section 37 (Fuel System (Inspection) [A25A-FXS])
- Section 38 (Engine Control System (Service Information) [A25A-FXS])
- Section 39 (Emission Control System (Service Information) [A25A-FXS])
- Section 40 (Exhaust / Intake System (Service Information) [A25A-FXS])
- Section 41 (Engine Mechanical (Service Information) [A25A-FXS] (1 Of 2))
- Section 42 (Lighting System (W/ Cornering Light) - Diagnostics - Introduction (Hybrid))
- Section 43 (Lighting System (W/O Cornering Light) - Diagnostics - Introduction (Hybrid))
- Section 44 (Hybrid Transmission (Service Information) [P710])
- Section 45 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (3 Of 4))
- Section 46 (Theft Deterrent System - Diagnostics & Circuit Tests (Hybrid))
- Section 47 (Sliding Roof - Diagnostics - Introduction (Hybrid))
- Section 48 (Intelligent Clearance Sonar System - Diagnostics - Introduction (Hybrid))
- Section 49 (Air Conditioning System - Diagnostics - Introduction (Hybrid))
- Section 50 (Brake System (Inspection) (Hybrid))
- Section 51 (Meter / Gauge / Display - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 52 (Engine Cooling Fan System (Inspection) [A25A-FXS])
- Section 53 (Supplemental Restraint System - Diagnostic Codes (B1160-B1653) (Hybrid))
- Section 54 (Window Defogger - Diagnostics & Symptom Tests (Hybrid))
- Section 55 (Can Communication System - Diagnostics - Introduction (Hybrid) (4 Of 7))
- Section 56 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0190-P0400))
- Section 57 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0105-P0190))
- Section 58 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (4 Of 4))
- Section 59 (Engine Lubrication System (Service Information) [A25A-FXS])
- Section 60 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0010-P0100))
- Section 61 (Ignition System (Inspection) [A25A-FXS])
- Section 62 (Exhaust / Intake System (Inspection) [A25A-FXS])
- Section 63 (Engine Mechanical (Service Information) [A25A-FXS] (2 Of 2))
- Section 64 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0400-P0520))
- Section 65 (Panoramic View Monitor System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 66 (Navigation System - Symptom Tests (Hybrid))
- Section 67 (Blind Spot Monitor System - Diagnostics - Introduction (Hybrid))
- Section 68 (Occupant Classification System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 69 (Air Conditioning System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 70 (Engine Control System - Diagnostic Codes [A25A-FXS] (P26CB-U1293) & Circuit Tests)
- Section 71 (Engine Cooling System (Inspection) [A25A-FXS])
- Section 72 (Intuitive Parking Assist System - Diagnostics - Introduction (Hybrid))
- Section 73 (Electric Parking System - Diagnostics - Introduction (Hybrid))
- Section 74 (HEADUP Display System - Diagnostics - Introduction (Hybrid))
- Section 75 (Power Tilt & Telescopic Steering Column - Diagnostics - Introduction (Hybrid))
- Section 76 (Can Communication System - Diagnostics - Introduction (Hybrid) (5 Of 7))
- Section 77 (Can Communication System - Circuit Tests (Hybrid) (2 Of 2))
- Section 78 (Can Communication System - Diagnostic Codes & Circuit Tests (Hybrid) (1 Of 2))
- Section 79 (Telematics System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 80 (Smart Key System (Keyless Start) - Diagnostic Codes (Hybrid))
- Section 81 (Front Camera System - Diagnostics - Introduction (Hybrid))
- Section 82 (Electric Parking System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 83 (Power Door Lock Control System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 84 (Smart Key System (Keyless Start) - Symptom Tests (Hybrid))
- Section 85 (Blind Spot Monitor System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 86 (Audio / Video System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 87 (Audio / Video System - Circuit Tests (Hybrid))
- Section 88 (Seat Belt Warning System - Diagnostics & Symptom Tests (Hybrid))
- Section 89 (Lin Communication System - Diagnostics - Introduction (Hybrid))
- Section 90 (Power Window Control System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 91 (Telematics System - Diagnostics - Introduction (Hybrid))
- Section 92 (Can Communication System - Diagnostics - Introduction (Hybrid) (7 Of 7))
- Section 93 (Engine Cooling System (Service Information) [A25A-FXS])
- Section 94 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (2 Of 4))
- Section 95 (Can Communication System - Diagnostics - Introduction (Hybrid) (6 Of 7))
- Section 96 (Engine Lubrication System (Inspection) [A25A-FXS])
- Section 97 (Safety Connect System - Diagnostics - Introduction (Hybrid))
- Section 98 (Safety Connect System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 99 (Can Communication System - Diagnostics - Introduction (Hybrid) (2 Of 7))
- Section 100 (HEADUP Display System - Diagnostic Codes - (Hybrid))
- Section 101 (Lane Departure Alert System - Diagnostics - Introduction (Hybrid))
- Section 102 (Front Power Seat Control System (W/ Memory) - Diagnostics - Introduction (Hybrid))
- Section 103 (Power Mirror Control (W/ Memory) - Diagnostics - Introduction (Hybrid))
- Section 104 (Garage Door Opener (Inspection & Registration) (Hybrid))
- Section 105 (Engine Control System - Diagnostic Codes [A25A-FXS] (P2100-P26CB))
- Section 106 (Power Outlets (Interior) - Diagnostics & Circuit Tests (Hybrid))
- Section 107 (Navigation System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 108 (Engine Control System - Diagnostic Codes [A25A-FXS] (P107A-P2100))
- Section 109 (Power Mirror Control (W/O Memory) - Diagnostics & Symptom Tests (Hybrid))
- Section 110 (Power Mirror Control (W/ Memory) - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 111 (Front Power Seat Control System (W/ Memory) - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 112 (Meter / Gauge / Display (Inspection) (Hybrid))
- Section 113 (Electronically Controlled Brake System - Diagnostic Codes (C1202-C1300) (Hybrid))
- Section 114 (Electronically Controlled Brake System - Diagnostic Codes (C1415-U0073) & Symptom Tests (Hybrid))
- Section 115 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0520-P107A))
- Section 116 (Parking Assist Monitor System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 117 (Seat Heater - Diagnostics - Introduction (Hybrid))
- Section 118 (Starting System (Service Information) [A25A-FXS])
- Section 119 (Lin Communication System - Diagnostic Codes (Hybrid))
- Section 120 (Fuel Lid Opener System - Diagnostics & Symptom Tests (Hybrid))
- Section 121 (Sliding Roof - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 122 (TOYOTA ENTUNE System - Diagnostics & Symptom Tests (Hybrid))
- Section 123 (Intuitive Parking Assist System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 124 (Wiper System / Washer System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 125 (Wiper System / Washer System - Diagnostics - Introduction (Hybrid))
- Section 126 (Intelligent Clearance Sonar System - Diagnostic Codes (Hybrid))
- Section 127 (Tire Pressure Warning System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 128 (Electronically Controlled Brake System - Diagnostic Codes (C1311-C1413) (Hybrid))
- Section 129 (Seat Heater - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 130 (Power Tilt & Telescopic Steering Column - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 131 (Supplemental Restraint System - Diagnostic Codes (B1656-U0154) & Symptom Tests (Hybrid))
- Section 132 (Climate Control Seat - Diagnostics & Symptom Tests (Hybrid))
- Section 133 (Charging System - Diagnostics - Introduction [A25A-FXS])
- Section 134 (Emission Control System (Inspection) [A25A-FXS])
- Section 135 (Heated Steering Wheel (Inspection) (Hybrid))
- Different car
- Section 1 (Pre-Collision System - Diagnostics - Introduction)
- Section 2 (Front Camera System - Diagnostic Codes)
- Section 3 (Lane Tracing Assist System - Diagnostic Codes & Circuit Tests)
- Section 4 (Road Sign Assist System - Diagnostic Codes)
- Section 5 (Pre-Collision System - Diagnostic Codes)
- Section 6 (Front Camera System - Diagnostic - Introduction)
- Section 7 (Charging System - Diagnostic Codes & Symptom Tests [A25A-FKS])
- Section 8 (Front Radar Sensor System - Diagnostic Codes)
- Section 9 (Telematics System - Diagnostics - Introduction)
- Section 10 (Safety Connect System - Diagnostics - Introduction)
- Section 11 (Safety Connect System - Diagnostic Codes & Symptom Tests)
- Section 12 (Telematics System - Diagnostic Codes & Symptom Tests)
- Section 13 (Motor Generator Control System - Diagnostics - Introduction (Lithium-Ion))
- Section 14 (Engine Control System - Symptom Tests [A25A-FKS] (2 Of 2))
- Section 15 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0010-P0125))
- Section 16 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0365-P0606))
- Section 17 (Engine Control System - Diagnostic Codes [A25A-FKS] (P16B0-U0155) & Symptom Tests (1 Of 2))
- Section 18 (Engine Control System - Diagnostics - Introduction [A25A-FKS] (1 Of 2))
- Section 19 (Emission Control System (Service Information) [A25A-FKS))
- Section 20 (Exhaust / Intake System (Service Information) [A25A-FKS])
- Section 21 (Fuel System (Service Information) [A25A-FKS])
- Section 22 (Engine Control System (Service Information) [A25A-FKS])
- Section 23 (Engine Lubrication System (Service Information) [A25A-FKS])
- Section 24 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0607-P1607))
- Section 25 (Starting System (Service Information) [A25A-FKS])
- Section 26 (Automatic Transmission (Service Information) [UB80F])
- Section 27 (Engine Control System - Diagnostics - Introduction [A25A-FKS] (2 Of 2))
- Section 28 (Ignition System (Inspection) [A25A-FKS])
- Section 29 (Engine Mechanical (Service Information) [A25A-FKS])
- Section 30 (Fuel System (Inspection) [A25A-FKS])
- Section 31 (Automatic Transmission - Diagnostics - Introduction [UB80F])
- Section 32 (Hybrid Control System - Diagnostic Codes (U0111-U0424) & Circuit Tests (Lithium-Ion))
- Section 33 (Hybrid Control System - Diagnostics - Introduction (Lithium))
- Section 34 (Hybrid Battery System - Diagnostics - Introduction (Lithium-Ion))
- Section 35 (Hybrid Control System - Diagnostic Codes (P0560-P0AA3) (Lithium-Ion))
- Section 36 (Front Radar Sensor System - Diagnostics - Introduction)
- Section 37 (Engine Cooling System (Inspection) [A25A-FKS])
- Section 38 (Engine Lubrication System (Inspection) [A25A-FKS])
- Section 39 (Battery / Charging System (Service Information) [A25A-FKS])
- Section 40 (Engine Cooling System (Service Information) [A25A-FKS])
- Section 41 (Engine Cooling Fan System (Inspection) [A25A-FKS])
- Section 42 (Hybrid Control System - Diagnostic Codes (P0AA6-P1C81) (Lithium-Ion))
- Section 43 (Motor Generator Control System - Diagnostic Codes (P0A90-P0E00) (Lithium-Ion))
- Section 44 (Motor Generator Control System - Diagnostic Codes (P0E00-U0100) (Lithium-Ion))
- Section 45 (Hybrid Control System - Diagnostic Codes (P1C83-U0100) (Lithium-Ion))
- Section 46 (Transfer Case - Diagnostics - Introduction)
- Section 47 (Transfer Case (Service Information))
- Section 48 (Hybrid Battery System - Diagnostic Codes (P1AC4-U1150) & Circuit Tests (Lithium-Ion))
- Section 49 (Lane Tracing Assist System - Diagnostics - Introduction)
- Section 50 (Emission Control System (Inspection) [A25A-FKS])
- Section 51 (Starting System (Inspection) [A25A-FKS])
- Section 52 (Charging System - Diagnostics - Introduction [A25A-FKS])
- Section 53 (Hybrid Battery System - Diagnostic Codes (P0ABF-P1AC4) (Lithium-Ion))
- Section 54 (Hybrid Battery System - Diagnostic Codes (P0560-P0AAC) (Lithium-Ion))
- Section 55 (Transfer Case - Diagnostic Codes & Symptom Tests)
- Section 56 (Automatic Transmission - Diagnostic Codes [UB80F])
- Section 57 (Road Sign Assist System - Diagnostics - Introduction)
- Section 58 (Motor Generator Control System - Diagnostic Codes (P0335-P0A7A) (Lithium-Ion))
- Section 59 (Exhaust / Intake System (Inspection) [A25A-FKS])
- Section 60 (TOYOTA Audio Multimedia System - Diagnostics & Circuit Tests)
- Section 61 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0128-P0340))
- Section 62 (Automatic Transmission - Diagnostic Codes & Circuit Tests [UB80F])
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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