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.
2021 Toyota Avalon TRDFACTORY OEM SERVICE PROCEDURE
External Pages
These are pages that do not belong to the exact selected vehicle (2021 Toyota Avalon Limited, 3.5L Eng VIN Z), 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 (Charging System - Diagnostic Codes & Symptom Tests [A25A-FKS])
- Section 12 (Battery / Charging System (Service Information) [A25A-FXS])
- Section 13 (Navigation System - Diagnostics - Introduction (Hybrid))
- Section 14 (Audio / Video System - Diagnostics - Introduction (Hybrid))
- Section 15 (Can Communication System - Diagnostics - Introduction (Hybrid) (1 Of 7))
- Section 16 (Smart Key System (Keyless Start) - Diagnostics - Introduction (Hybrid))
- Section 17 (Smart Key System (Keyless Entry) - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 18 (Smart Key System (Keyless Entry) - Diagnostics - Introduction (Hybrid))
- Section 19 (Wireless Door Lock Control System - Diagnostics - Introduction (Hybrid))
- Section 20 (Tire Pressure Warning System - Diagnostics - Introduction (Hybrid))
- Section 21 (Lighting System (Interior) - Diagnostics & Circuit Tests (Hybrid))
- Section 22 (Power Door Lock Control System - Diagnostics - Introduction (Hybrid))
- Section 23 (Meter / Gauge / Display - Diagnostics - Introduction (Hybrid))
- Section 24 (Wireless Door Lock Control System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 25 (Audio / Video System - Inspection (Hybrid))
- Section 26 (Navigation System (Inspection) (Hybrid))
- Section 27 (Power Window Control System - Diagnostics - Introduction (Hybrid))
- Section 28 (Occupant Classification System - Diagnostics - Introduction (Hybrid))
- Section 29 (Front Camera System - Diagnostic Codes (Hybrid))
- Section 30 (Lane Departure Alert System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 31 (Can Communication System - Diagnostics - Introduction (Hybrid) (3 Of 7))
- Section 32 (Pre-Collision System - Diagnostic Codes (Hybrid))
- Section 33 (Power Steering System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 34 (Power Steering System - Diagnostics - Introduction (Hybrid))
- Section 35 (Electronically Controlled Brake System - Diagnostics - Introduction (2 Of 2) (Hybrid))
- Section 36 (Fuel System (Service Information) [A25A-FXS])
- Section 37 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (1 Of 4))
- Section 38 (Fuel System (Inspection) [A25A-FXS])
- Section 39 (Engine Control System (Service Information) [A25A-FXS])
- Section 40 (Emission Control System (Service Information) [A25A-FXS])
- Section 41 (Exhaust / Intake System (Service Information) [A25A-FXS])
- Section 42 (Engine Mechanical (Service Information) [A25A-FXS] (1 Of 2))
- Section 43 (Lighting System (W/ Cornering Light) - Diagnostics - Introduction (Hybrid))
- Section 44 (Lighting System (W/O Cornering Light) - Diagnostics - Introduction (Hybrid))
- Section 45 (Hybrid Transmission (Service Information) [P710])
- Section 46 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (3 Of 4))
- Section 47 (Engine Control System - Symptom Tests [A25A-FKS] (2 Of 2))
- Section 48 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0010-P0125))
- Section 49 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0365-P0606))
- Section 50 (Engine Control System - Diagnostic Codes [A25A-FKS] (P16B0-U0155) & Symptom Tests (1 Of 2))
- Section 51 (Engine Control System - Diagnostics - Introduction [A25A-FKS] (1 Of 2))
- Section 52 (Emission Control System (Service Information) [A25A-FKS))
- Section 53 (Exhaust / Intake System (Service Information) [A25A-FKS])
- Section 54 (Fuel System (Service Information) [A25A-FKS])
- Section 55 (Engine Control System (Service Information) [A25A-FKS])
- Section 56 (Engine Lubrication System (Service Information) [A25A-FKS])
- Section 57 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0607-P1607))
- Section 58 (Starting System (Service Information) [A25A-FKS])
- Section 59 (Automatic Transmission (Service Information) [UB80F])
- Section 60 (Engine Control System - Diagnostics - Introduction [A25A-FKS] (2 Of 2))
- Section 61 (Ignition System (Inspection) [A25A-FKS])
- Section 62 (Engine Mechanical (Service Information) [A25A-FKS])
- Section 63 (Fuel System (Inspection) [A25A-FKS])
- Section 64 (Theft Deterrent System - Diagnostics & Circuit Tests (Hybrid))
- Section 65 (Sliding Roof - Diagnostics - Introduction (Hybrid))
- Section 66 (Intelligent Clearance Sonar System - Diagnostics - Introduction (Hybrid))
- Section 67 (Automatic Transmission - Diagnostics - Introduction [UB80F])
- Section 68 (Air Conditioning System - Diagnostics - Introduction (Hybrid))
- Section 69 (Brake System (Inspection) (Hybrid))
- Section 70 (Meter / Gauge / Display - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 71 (Engine Cooling Fan System (Inspection) [A25A-FXS])
- Section 72 (Supplemental Restraint System - Diagnostic Codes (B1160-B1653) (Hybrid))
- Section 73 (Window Defogger - Diagnostics & Symptom Tests (Hybrid))
- Section 74 (Can Communication System - Diagnostics - Introduction (Hybrid) (4 Of 7))
- Section 75 (Engine Cooling System (Inspection) [A25A-FKS])
- Section 76 (Engine Lubrication System (Inspection) [A25A-FKS])
- Section 77 (Battery / Charging System (Service Information) [A25A-FKS])
- Section 78 (Engine Cooling System (Service Information) [A25A-FKS])
- Section 79 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0190-P0400))
- Section 80 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0105-P0190))
- Section 81 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (4 Of 4))
- Section 82 (Engine Lubrication System (Service Information) [A25A-FXS])
- Section 83 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0010-P0100))
- Section 84 (Ignition System (Inspection) [A25A-FXS])
- Section 85 (Exhaust / Intake System (Inspection) [A25A-FXS])
- Section 86 (Engine Mechanical (Service Information) [A25A-FXS] (2 Of 2))
- Section 87 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0400-P0520))
- Section 88 (Panoramic View Monitor System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 89 (Navigation System - Symptom Tests (Hybrid))
- Section 90 (Blind Spot Monitor System - Diagnostics - Introduction (Hybrid))
- Section 91 (Engine Cooling Fan System (Inspection) [A25A-FKS])
- Section 92 (Occupant Classification System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 93 (Air Conditioning System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 94 (Engine Control System - Diagnostic Codes [A25A-FXS] (P26CB-U1293) & Circuit Tests)
- Section 95 (Transfer Case - Diagnostics - Introduction)
- Section 96 (Transfer Case (Service Information))
- Section 97 (Engine Cooling System (Inspection) [A25A-FXS])
- Section 98 (Intuitive Parking Assist System - Diagnostics - Introduction (Hybrid))
- Section 99 (Electric Parking System - Diagnostics - Introduction (Hybrid))
- Section 100 (HEADUP Display System - Diagnostics - Introduction (Hybrid))
- Section 101 (Power Tilt & Telescopic Steering Column - Diagnostics - Introduction (Hybrid))
- Section 102 (Emission Control System (Inspection) [A25A-FKS])
- Section 103 (Can Communication System - Diagnostics - Introduction (Hybrid) (5 Of 7))
- Section 104 (Can Communication System - Circuit Tests (Hybrid) (2 Of 2))
- Section 105 (Can Communication System - Diagnostic Codes & Circuit Tests (Hybrid) (1 Of 2))
- Section 106 (Smart Key System (Keyless Start) - Diagnostic Codes (Hybrid))
- Section 107 (Starting System (Inspection) [A25A-FKS])
- Section 108 (Front Camera System - Diagnostics - Introduction (Hybrid))
- Section 109 (Electric Parking System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 110 (Power Door Lock Control System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 111 (Smart Key System (Keyless Start) - Symptom Tests (Hybrid))
- Section 112 (Blind Spot Monitor System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 113 (Audio / Video System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 114 (Audio / Video System - Circuit Tests (Hybrid))
- Section 115 (Seat Belt Warning System - Diagnostics & Symptom Tests (Hybrid))
- Section 116 (Lin Communication System - Diagnostics - Introduction (Hybrid))
- Section 117 (Power Window Control System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 118 (Can Communication System - Diagnostics - Introduction (Hybrid) (7 Of 7))
- Section 119 (Engine Cooling System (Service Information) [A25A-FXS])
- Section 120 (Engine Control System - Diagnostics - Introduction [A25A-FXS] (2 Of 4))
- Section 121 (Can Communication System - Diagnostics - Introduction (Hybrid) (6 Of 7))
- Section 122 (Engine Lubrication System (Inspection) [A25A-FXS])
- Section 123 (Can Communication System - Diagnostics - Introduction (Hybrid) (2 Of 7))
- Section 124 (Transfer Case - Diagnostic Codes & Symptom Tests)
- Section 125 (HEADUP Display System - Diagnostic Codes - (Hybrid))
- Section 126 (Automatic Transmission - Diagnostic Codes [UB80F])
- Section 127 (Lane Departure Alert System - Diagnostics - Introduction (Hybrid))
- Section 128 (Front Power Seat Control System (W/ Memory) - Diagnostics - Introduction (Hybrid))
- Section 129 (Power Mirror Control (W/ Memory) - Diagnostics - Introduction (Hybrid))
- Section 130 (Garage Door Opener (Inspection & Registration) (Hybrid))
- Section 131 (Engine Control System - Diagnostic Codes [A25A-FXS] (P2100-P26CB))
- Section 132 (Power Outlets (Interior) - Diagnostics & Circuit Tests (Hybrid))
- Section 133 (Navigation System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 134 (Engine Control System - Diagnostic Codes [A25A-FXS] (P107A-P2100))
- Section 135 (Power Mirror Control (W/O Memory) - Diagnostics & Symptom Tests (Hybrid))
- Section 136 (Power Mirror Control (W/ Memory) - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 137 (Front Power Seat Control System (W/ Memory) - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 138 (Meter / Gauge / Display (Inspection) (Hybrid))
- Section 139 (Electronically Controlled Brake System - Diagnostic Codes (C1202-C1300) (Hybrid))
- Section 140 (Electronically Controlled Brake System - Diagnostic Codes (C1415-U0073) & Symptom Tests (Hybrid))
- Section 141 (Engine Control System - Diagnostic Codes [A25A-FXS] (P0520-P107A))
- Section 142 (Parking Assist Monitor System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 143 (Seat Heater - Diagnostics - Introduction (Hybrid))
- Section 144 (Starting System (Service Information) [A25A-FXS])
- Section 145 (Lin Communication System - Diagnostic Codes (Hybrid))
- Section 146 (Fuel Lid Opener System - Diagnostics & Symptom Tests (Hybrid))
- Section 147 (Exhaust / Intake System (Inspection) [A25A-FKS])
- Section 148 (Sliding Roof - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 149 (Engine Control System - Diagnostic Codes [A25A-FKS] (P0128-P0340))
- Section 150 (Intuitive Parking Assist System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 151 (Wiper System / Washer System - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 152 (Wiper System / Washer System - Diagnostics - Introduction (Hybrid))
- Section 153 (Intelligent Clearance Sonar System - Diagnostic Codes (Hybrid))
- Section 154 (Tire Pressure Warning System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 155 (Electronically Controlled Brake System - Diagnostic Codes (C1311-C1413) (Hybrid))
- Section 156 (Seat Heater - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 157 (Power Tilt & Telescopic Steering Column - Diagnostic Codes & Circuit Tests (Hybrid))
- Section 158 (Supplemental Restraint System - Diagnostic Codes (B1656-U0154) & Symptom Tests (Hybrid))
- Section 159 (Automatic Transmission - Diagnostic Codes & Circuit Tests [UB80F])
- Section 160 (Climate Control Seat - Diagnostics & Symptom Tests (Hybrid))
- Section 161 (Charging System - Diagnostics - Introduction [A25A-FXS])
- Section 162 (Emission Control System (Inspection) [A25A-FXS])
- Section 163 (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 (Front Radar Sensor System - Diagnostic Codes)
- Section 8 (Telematics System - Diagnostic Codes & Symptom Tests (Except Hybrid))
- Section 9 (Vehicle Proximity Notification System - Diagnostics - Introduction)
- Section 10 (Hybrid Control System (Nickel Metal Hydride) - Diagnostics - Introduction (1 Of 2))
- Section 11 (Vehicle Proximity Notification System - Diagnostic Code & Symptom Tests)
- Section 12 (Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P1C9F-P3147))
- Section 13 (Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P0A9B-P0ADD))
- Section 14 (Hybrid Control System (Nickel Metal Hydride) - Diagnostics - Introduction (2 Of 2))
- Section 15 (Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P0AE1-P1C87))
- Section 16 (Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P0560-P0A9B))
- Section 17 (Motor Generator Control System (Nickel Metal Hydride) - Diagnostics - Introduction)
- Section 18 (Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P314A-U0424) & Circuit Tests)
- Section 19 (Motor Generator Control System (Nickel Metal Hydride) - Diagnostic Codes (P0A90-P0E00))
- Section 20 (Motor Generator Control System (Nickel Metal Hydride) - Diagnostic Codes (P0335-P0A7A))
- Section 21 (Front Radar Sensor System - Diagnostics - Introduction)
- Section 22 (Vehicle Proximity Notification System (Service Information))
- Section 23 (Lane Tracing Assist System - Diagnostics - Introduction)
- Section 24 (Telematics System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 25 (Motor Generator Control System (Nickel Metal Hydride) - Diagnostic Codes (P0E00-U0100))
- Section 26 (Telematics System - Diagnostics - Introduction (Hybrid))
- Section 27 (Safety Connect System - Diagnostics - Introduction (Hybrid))
- Section 28 (Safety Connect System - Diagnostic Codes & Symptom Tests (Hybrid))
- Section 29 (Road Sign Assist System - Diagnostics - Introduction)
- Section 30 (Safety Connect System - Diagnostics - Introduction (Except Hybrid))
- Section 31 (Telematics System - Diagnostics - Introduction (Except Hybrid))
- Section 32 (Safety Connect System - Diagnostic Codes & Symptom Tests (Except Hybrid))
- Section 33 (TOYOTA ENTUNE System - Diagnostics & Symptom Tests (Except Hybrid))
- Section 34 (TOYOTA ENTUNE System - Diagnostics & Symptom Tests (Hybrid))
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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