CARFACTBOOK / DIAGNOSTIC REFERENCE

Start with the symptom. Follow the evidence.

Choose a symptom and your exact chassis when possible. Each next check follows the result you record—not a guessed failed part. CarFactBook keeps a traceable path and prepares a practical mechanic handoff.

Symptom first

What are you seeing?

Electrical

Won't start / hard starting

Check reviewed reports for Toyota Aqua NHP10.

Electrical

Warning light or message

Check reviewed reports for Toyota Aqua NHP10.

Cooling

Overheating / running hot

Check reviewed reports for Toyota Aqua NHP10.

A/C / climate

A/C not cold

Check reviewed reports for Toyota Aqua NHP10.

Suspension / steering

Vibration / shaking

Check reviewed reports for Toyota Aqua NHP10.

Brakes

Brake problem

Check reviewed reports for Toyota Aqua NHP10.

Hybrid / EV system

Hybrid-system problem

Check reviewed reports for Toyota Aqua NHP10.

Fuel / emissions

Poor fuel economy

Check reviewed reports for Toyota Aqua NHP10.

Choose an exact vehicle

Selected: Toyota Aqua NHP10 · 2011–2021

Diagnostics v3 · Structured symptom flow

Hybrid-system problem — structured test-result path

0 results recorded
Safety boundary. High-voltage hybrid/EV systems can be hazardous. Do not open or probe high-voltage components unless you are trained and equipped for the vehicle.
Next reachable check

Is there an exact hybrid-system warning or diagnostic code?

The exact message/code is stronger evidence than guessing which hybrid component failed.

Mechanic handoff summary

Further evidence required. 0 reachable results recorded.

Results stay on this page until you leave or change vehicle/symptom. Optional saving stores only this v3 session on this browser, separate from Garage and Vehicle Passport. It is not uploaded or shared. References are refreshed from CarFactBook when you return.

Preparing Diagnostics v3 handoff…

After a mechanic checks or repairs the car

Close the loop with the actual diagnosis, repair, part, cost and follow-up. The exact vehicle, symptom area and the test-result path above are prefilled, but you can edit them before submitting.

Choose an exact vehicle above to prepare a repair-outcome report.Reports remain pending until CarFactBook reviews them. A diagnostic path or external test result never becomes a confirmed diagnosis automatically.
Toyota Aqua NHP10

Useful references for your exact car

These references relate to the selected symptom. They do not identify a faulty component or recommend replacing it. Confirm equipment, production period and source caveats for your individual car.

Verified facts

Engine and inverter coolant capacity →

Toyota Super Long Life Coolant; gasoline engine 5.3 L cold-climate / 4.5 L non-cold-climate; inverter 1.6 L

NHP10 manual reference. Capacity varies by cold-climate specification; use the specified Toyota coolant and confirm the vehicle specification before service.

Toyota Motor Corporation · Verified 2026-10-02

Engine coolant capacity →

5.3 L cold-climate specification / 4.5 L non-cold-climate specification

Capacity depends on cold-climate specification.

Toyota Motor Corporation · Verified 2026-10-06

Smart key battery →

CR1632 (electronic smart key)

Earlier NHP10 production and different key types can use a different battery. Match the key type and production period before buying.

Toyota Motor Corporation · Verified 2026-09-27

Traction motor code →

1LM

High-voltage traction-motor reference; not the 12V auxiliary system.

Toyota Motor Corporation · Verified 2026-10-02

Maintenance

Documented service references; your service history determines what is due.

Engine and inverter coolant service reference

Condition based

Use Toyota Super Long Life Coolant when servicing the cooling systems; the manual lists gasoline-engine and inverter capacities separately.

This is an exact fluid/capacity service reference, not a published replacement interval.

Toyota Japan Aqua 2015 owner manual ↗ · Verified 2026-10-01

Smart-key battery replacement reference

Condition based

Use a CR1632 battery for the electronic smart key when replacement is required.

Applies to the electronic smart-key type covered by the cited Toyota FAQ; other key types or production periods can differ.

Toyota Japan Aqua FAQ ↗ · Verified 2026-10-02

Full exact-car maintenance schedule →

Parts / fitment

Reference specifications, not a shopping list or proof that these parts need replacement. Fitment conditions still apply.

Smart key battery

CR1632 (electronic smart key)

Earlier NHP10 production and different key types can use a different battery. Match the key type and production period before buying.

Toyota Motor Corporation source ↗ · Verified 2026-09-27

1LM traction motor

1LM electric traction motor

NHP10 manufacturer specification. High-voltage hybrid-system component; do not confuse with the 12V auxiliary system.

Toyota Motor Corporation source ↗ · Verified 2026-10-02

Engine/inverter coolant — 2015 manual

Toyota Super Long Life Coolant; gasoline engine 5.3 L cold-climate / 4.5 L non-cold-climate; inverter 1.6 L

NHP10 manual reference. Capacity varies by cold-climate specification; use the specified Toyota coolant and confirm the vehicle specification before service.

Toyota Motor Corporation source ↗ · Verified 2026-10-01

Full exact-car parts references →

Reviewed repair evidence

Hybrid-system problem

0 related reports

Reports are matched by related system category for Toyota Aqua NHP10. Compare the recorded symptom and outcome; a repair on another car does not diagnose yours.

No reviewed match yet. CarFactBook will not manufacture a likely cause just to fill this screen. Check the exact vehicle facts or contribute a real repair outcome through Problems.

Browse or contribute reviewed problem & repair evidence →