Parts for your 2002 Daihatsu Gran move-Knock sensor

2002 Daihatsu Gran Move knock sensor — is it actually there?

For the 2002 Daihatsu Gran Move (G300-series, also known as Pyzar in some markets), a factory-fitted knock sensor isn’t used. The petrol engines offered at the end of the model’s run — the HC‑EJ 1.3 SOHC EFI and the HD‑EP 1.6 SOHC EFI — run distributor-based ignition with ECU control but without knock feedback. That means there’s no knock sensor to locate, test or replace on these vehicles.

This isn’t a cost-cut, it’s how the engine management was engineered. These engines use a conservative ignition map suited to regular unleaded, with timing governed by the ECU and distributor signals. Feedback for fuelling and emissions comes from sensors like the oxygen sensor, coolant temp, throttle position and MAP, but there’s no detonation sensing circuit in the wiring diagrams for these Gran Move variants. In short, the platform predates the widespread knock-control strategies Daihatsu later applied to newer multi-point, coil-on-plug engines.

Why wasn’t a knock sensor used here?

• The SOHC engines are relatively low specific output with timing calibrated to avoid detonation on typical AU/NZ fuel.
• The ignition architecture is distributor-based, and the ECU strategy relies on mapped timing rather than adaptive knock control.
• Factory documentation and parts catalogues for the G300-series don’t list a knock sensor or related harness branch for these engines.

Owners chasing a “knock sensor” issue on a 2002 Gran Move (e.g., from a generic scan tool listing P0325) will usually be dealing with either a universal OBD misread or a different fault altogether. Under the bonnet, the smart checks are:

1. Fuel quality and carbon build-up: run decent petrol, consider an intake clean if it’s been pinging under load.
2. Base timing and distributor condition: verify timing marks, inspect cap/rotor, leads and spark plugs.
3. Vacuum leaks and MAP signal: split hoses or a lazy MAP sensor can mimic knock-like symptoms.
4. Cooling performance: hot running encourages detonation, check the thermostat and radiator condition.

Technical sources referenced for this conclusion:

• Daihatsu Gran Move/Pyzar G300-series Workshop Manual (Engine Electrical/EFI, Ignition & Wiring Diagrams), model years 1996–2002 — no knock sensor circuit or component shown for HC‑EJ/HD‑EP engines.
• Daihatsu Electronic Parts Catalogue (EPC), G303/G311 listings — engine sensor section does not include a knock sensor for HC‑EJ/HD‑EP variants.
• Autodata technical data for Gran Move (2002, petrol) — component locations and pin-outs omit a knock sensor on these engines.

FAQs

Does the 2002 Daihatsu Gran Move have a knock sensor?
It doesn’t. Factory literature for the G300-series Gran Move (2002 build year) shows no knock sensor on the HC‑EJ 1.3 or HD‑EP 1.6 petrol engines. Ignition timing is ECU-controlled via the distributor without knock feedback.

Where would a knock sensor be on a 2002 Gran Move if it had one?
On engines that use them, a knock sensor typically threads into the block, mid-way down on the intake side. On the 2002 Gran Move’s engines there’s no sensor boss or loom branch for a knock sensor, so there’s nothing to find or replace.

My scan tool shows P0325 (knock sensor circuit) — what should I check?
Generic scan tools can show universal codes not applicable to a given car. On a 2002 Gran Move, look elsewhere: verify fuel quality, check for vacuum leaks, inspect plugs/leads/distributor, ensure correct base timing, and confirm coolant temps. If a code persists, use a data source specific to Gran Move/Pyzar to avoid chasing non-existent components.