Engine & fuel system
2 documented faults — symptoms, causes and workshop fixes.
Unable to remove in-tank fuel pump
Overview
- Affects
- All models with in-tank fuel pump assembly retaining ring.
- Remedy
- Fit new part
Cause
Retaining ring for fuel pump assembly seized to fuel tank.
Repair
- Cut through retaining ring to enable removal from fuel tank. Avoid damaging fuel tank threads.
- Inspect fuel tank threads for damage. If fuel tank threads damaged or new retaining ring will not tighten: Fit new fuel tank.
Data: Motorwise Workshop. Bulletin 5.
Engine malfunction indicator lamp (MIL) illuminated. Trouble code stored: P0101
Engine control module (ECM) software fault. Fix: fit a new part.
Overview
- Affects
- All models with 2ZR-FE engine code.
- Fault codes
P0101- Remedy
- Fit new part
Symptoms
Engine runs in limp home mode. Lack of power.
Repair steps
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program engine control module (ECM) with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
- Fit new ECM software version label.
Parts
| Part | Part number | Qty |
|---|---|---|
| ECM software version label | 89685-20010 | 1 |
Data: Motorwise Workshop. Bulletin 6.
Electrical & ignition
1 documented fault — symptoms, causes and workshop fixes.
No sound from speakers, even though audio unit switched on
Audio unit failure due to water ingress through roof aerial base.
Overview
- Affects
- All models.
Repair steps
- Check aerial lead for water ingress or corrosion. Replace as necessary.
- Remove roof aerial base.
- Apply sealant to roof aerial base and refit.
- Replace audio unit.
Data: Motorwise Workshop. Bulletin 3.
Brakes
2 documented faults — symptoms, causes and workshop fixes.
ABS warning lamp, brake system warning lamp and ESP warning lamp illuminated
Symptoms
Trouble code stored in ABS control module fault memory: C1246.
Cause
Internal failure of ABS hydraulic modulator due to corrosion.
Repair
- Fit new ABS hydraulic modulator.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| ABS hydraulic modulator | 44050-0D041 | 1 |
Data: Motorwise Workshop. Bulletin 1.
Squeal from rear brakes
Symptoms
Rear brake pads sticking.
Cause
Unsatisfactory design of rear brake pads.
Repair
- Fit modified rear brake pads.
Data: Motorwise Workshop. Bulletin 4.
Steering
1 documented fault — symptoms, causes and workshop fixes.
Abnormal noise from steering when steering wheel turned
Cause
Unsatisfactory design of steering column.
Repair
- Fit modified steering column.
Data: Motorwise Workshop. Bulletin 2.
Glossary
Technical terms used in this guide.
- ECM
- Engine control module — the electronic unit that manages the engine
- ABS
- Anti-lock braking system — stops the wheels locking under hard braking
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Fault Memory
- The list of stored trouble codes in a control module
- In-Tank Fuel Pump
- The fuel pump mounted inside the fuel tank
- Limp Home
- A protective mode that limits power so the vehicle can be driven to a workshop
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Trouble Code
- A standardised fault code stored by a control module, read with a diagnostic tool
Frequently asked questions
What are the common faults with the Toyota Yaris 1.8 VVT-i?
This guide contains six workshop bulletins for the Toyota Yaris 1.8 VVT-i. Of these, two concern the engine and fuel system and two the brakes. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Toyota Yaris 1.8 VVT-i have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Toyota Yaris 1.8 VVT-i faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.