Parts for your 2010 Toyota Hiace-Knock sensor

2010 Toyota Hiace knock sensor: fitted on petrol models, not used on diesel models

After checking Toyota workshop material and catalogues, the 2010 Toyota Hiace only uses a knock sensor on its petrol engines (1TR-FE 2.0L and 2TR-FE 2.7L). The common diesel options for that year (2KD-FTV 2.5L and 1KD-FTV 3.0L D-4D) are not equipped with a conventional knock sensor.

• Technical basis: Toyota Hiace H200 Repair Manual (Engine/2TR-FE) includes knock sensor diagnostics (e.g., DTC P0325) and wiring to the ECM, the 1KD/2KD diesel engine control documents list no knock sensor in the sensor suite.
• Parts evidence: Toyota EPC lists “Sensor, Knock Control” for the 2TR-FE Hiace, no such listing for 1KD/2KD Hiace variants of the same year. The 2010 Hiace EWD also shows a KS line on petrol models.

For petrol Hiace owners, the knock sensor is a quiet hero. It “listens” for knock (pinging) and lets the ECU tweak ignition timing to keep the 2TR-FE/1TR-FE running sweet as, protecting the engine and helping fuel economy. It’s bolted to the block beneath the intake side, so it picks up vibrations cleanly. When it’s healthy, the van handles different loads, temps, and Aussie/NZ fuel qualities without fuss.

It’s not a regular service item, but it’s worth a look whenever the intake’s off or during a bigger service. Keep an eye on the harness and connector routing, as heat and oil weep can make plastics brittle. If the check engine light pops on with knock-sensor codes, or there’s pinging under load, lazy performance, or higher fuel use, it’s time to investigate.

• Typical fault codes: P0325 (Knock Sensor Circuit), P0327 (Low Input), P0328 (High Input).
• Handy tips if replacing:
  • Use a quality sensor and new washer if specified, the sensor’s clamping and resonance matter.
  • Torque it to the workshop spec and don’t over-tighten.
  • Route the loom exactly as per factory to avoid false signals.
  • Clear codes, then road-test with a proper warm-up and a few pulls under load.
• Everyday care: good fuel (at least the recommended octane), fix vacuum or intake leaks promptly, and keep oil leaks from soaking the sensor area.

For diesel Hiace (1KD/2KD), a knock sensor isn’t used because combustion is controlled by injection timing and rail pressure strategies rather than spark. Diesel combustion noise is inherently higher and less suited to a traditional knock sensor signal, Toyota’s D-4D ECU manages timing via crank/cam feedback, fuel pressure and temperature sensors, airflow/boost data, and pilot injection control, so a knock sensor isn’t part of the design for these engines.

Technical sources consulted (no outbound links):

• Toyota Hiace H200 Repair Manual (2005–2019), Engine/2TR-FE, Knock Sensor (KS) diagnostics and DTC P0325/P0327/P0328.
• Toyota Electrical Wiring Diagram (EWD), 2010 Hiace (H200), Engine Control – KS to ECM on petrol models.
• Toyota Electronic Parts Catalogue (EPC), 2010 Hiace: “Sensor, Knock Control” listed for 2TR-FE, not listed for 1KD/2KD.
• Toyota 1KD-FTV/2KD-FTV Engine Control System documentation – sensor list and system description (no knock sensor).

Popular questions

Where is the knock sensor on a 2010 Hiace 2TR-FE?
It’s mounted on the engine block on the intake side, roughly mid-block under the manifold runners. Access often means removing intake plumbing or the manifold for proper reach and correct torque.

What are the signs of a dodgy knock sensor on a petrol Hiace?
Check engine light with P0325/P0327/P0328, dull performance, worse fuel use, or pinging under load. Also inspect the connector and loom, as heat and oil can cause intermittent signals that mimic sensor failure.

Do diesel 2010 Hiace models have a knock sensor?
No. The 1KD/2KD D-4D engines control combustion with injection timing and other sensors, so a conventional knock sensor isn’t part of the diesel setup.