2025 Toyota Yaris Service and Repair Manual

This 2025 Toyota Yaris Service and Repair Manual Covers

Engine & Powertrain

• M15A-FKS 1.5L Dynamic Force petrol engine diagnostics and repair
• 1KR-FE 1.0L petrol engine diagnostics
• Hybrid engine control system diagnostics
• Fuel injection system troubleshooting
• Variable Valve Timing (VVT-iE) diagnostics
• Engine cooling system service procedures
• Exhaust and emissions control system repairs
• Engine performance troubleshooting
• Start-stop system diagnostics

Hybrid System Diagnostics (Hybrid Models)

• Toyota Hybrid System diagnostics
• Hybrid battery diagnostics
• Battery cooling system service procedures
• Inverter and converter diagnostics
• Electric motor-generator diagnostics
• Regenerative braking system troubleshooting
• High-voltage safety procedures
• Hybrid control ECU diagnostics

Transmission & Drivetrain

• Direct Shift CVT diagnostics and repair
• e-CVT hybrid transaxle diagnostics
• 6-speed manual transmission service procedures (where equipped)
• Front-wheel-drive system diagnostics
• Differential repairs
• Driveshaft and axle service procedures
• Clutch system repairs (manual models)

Chassis & Suspension

• MacPherson strut front suspension repairs
• Torsion beam rear suspension service procedures
• Electric Power Steering (EPS) diagnostics
• Wheel alignment specifications
• Steering angle sensor diagnostics
• Suspension component inspection and replacement
• Wheel bearing service procedures
• Ride and handling troubleshooting

Braking Systems

• Anti-lock Braking System (ABS) diagnostics
• Electronic Brake-force Distribution (EBD) diagnostics
• Brake Assist (BA) troubleshooting
• Vehicle Stability Control (VSC) diagnostics
• Traction Control (TRAC) system repairs
• Electronic parking brake diagnostics (where equipped)
• Regenerative braking diagnostics (hybrid models)
• Brake actuator testing procedures

Toyota Safety Sense™ & ADAS Systems

• Pre-Collision System (PCS) diagnostics
• Dynamic Radar Cruise Control (DRCC) diagnostics
• Lane Trace Assist (LTA) troubleshooting
• Lane Departure Alert (LDA) diagnostics
• Road Sign Assist (RSA) diagnostics
• Automatic High Beam (AHB) troubleshooting
• Driver monitoring system diagnostics (where equipped)
• Front camera calibration procedures
• Millimeter-wave radar calibration procedures
• ADAS control module diagnostics

Electrical & Wiring

• Complete factory wiring diagrams
• CAN Bus communication diagnostics
• CAN FD network diagnostics
• LIN Bus diagnostics
• Smart Key System troubleshooting
• Push-button start diagnostics
• Charging system diagnostics
• Lighting system diagnostics and repairs
• Body Control Module (BCM) diagnostics
• Body electrical troubleshooting

Infotainment & Connectivity

• Toyota Audio Multimedia system diagnostics
• Digital instrument cluster diagnostics
• Touchscreen display troubleshooting
• Bluetooth connectivity diagnostics
• Apple CarPlay diagnostics
• Android Auto diagnostics
• USB-C connectivity diagnostics
• Voice recognition system troubleshooting
• Connected services diagnostics
• Navigation system diagnostics (where equipped)

Air Conditioning & HVAC

• Automatic climate control diagnostics
• Manual air conditioning system repairs
• HVAC control module troubleshooting
• Refrigerant servicing procedures
• Blower motor diagnostics
• Hybrid heat management diagnostics (hybrid models)
• Heater and ventilation system repairs

Body & Interior

• Interior trim removal and installation procedures
• Power window repairs
• Power door lock diagnostics
• Smart entry system troubleshooting
• Exterior lighting repairs
• Airbag and occupant restraint system diagnostics
• Instrument cluster diagnostics
• Body repair and adjustment specifications

Diagnostics & Troubleshooting

• Toyota Techstream diagnostic procedures
• ECU communication diagnostics
• Sensor testing specifications
• Component activation tests
• Hybrid system diagnostics
• ADAS calibration procedures
• Network communication troubleshooting
• Step-by-step troubleshooting workflows

Common Error Codes Covered

This manual provides diagnostic and repair procedures for common Toyota Yaris fault codes.

Engine Management Codes

• P0101 – Mass Air Flow Sensor Performance Problem
• P0171 – System Too Lean (Bank 1)
• P0300 – Random/Multiple Cylinder Misfire Detected
• P0015 – Camshaft Position Timing Over-Retarded
• P26CB – Electric Coolant Pump Performance

Hybrid System Codes (Hybrid Models)

• P0A1F – Hybrid Powertrain Control Module Malfunction
• P0A80 – Hybrid Battery Pack Deterioration
• P3004 – High Voltage Power Resource Malfunction
• P0C73 – Motor Generator Performance Fault
• P0AA6 – High Voltage Isolation Fault

Transmission Codes

• P0705 – Transmission Range Sensor Circuit Malfunction
• P0717 – Input Speed Sensor No Signal
• P0746 – Pressure Control Solenoid Performance
• P2820 – Pressure Control Solenoid Performance Fault

Brake & Chassis Codes

• C1241 – Low Battery Positive Voltage
• C1336 – Zero Point Calibration Incomplete
• C1231 – Steering Angle Sensor Circuit Malfunction
• C1464 – Wheel Speed Sensor Malfunction

ADAS & Safety System Codes

• C1A10 – Radar Sensor Malfunction
• C1AA0 – Forward Recognition Camera Malfunction
• C1A47 – Camera Axis Misalignment
• C1A63 – Pre-Collision System Malfunction

Communication Network Codes

• U0100 – Lost Communication with ECM/PCM
• U0129 – Lost Communication with Brake Control Module
• U0235 – Lost Communication with Radar Sensor
• U0155 – Lost Communication with Instrument Cluster

Body & Electrical Codes

• B1242 – Air Conditioning Control Circuit Fault
• B1271 – Combination Meter ECU Communication Fault
• B2784 – Smart Key Communication Malfunction
• B2282 – Power Source Control ECU Malfunction

And thousands of additional Toyota diagnostic codes, wiring diagrams, calibration procedures, component specifications, testing procedures, and repair instructions.

Who Is This Manual For?

• Professional automotive workshops
• Toyota dealership technicians
• Hybrid vehicle specialists
• Fleet maintenance operators
• Independent repair garages
• Mobile mechanics
• Automotive training institutions
• Toyota Yaris owners performing DIY repairs

If you are troubleshooting, maintaining, servicing, or repairing a 2025 Toyota Yaris, this is the factory workshop manual you need.