Parts for your 2002 Daihatsu Gran move-Maf sensor

2002 Daihatsu Gran Move — is there a MAF sensor on this model?

Short answer: no, a MAF sensor isn’t used on the 2002 Daihatsu Gran Move. Daihatsu’s factory literature shows the G30‑series Gran Move/Pyzar engines run a speed‑density EFI strategy with a Manifold Absolute Pressure (MAP) sensor and an Intake Air Temperature (IAT) sensor, not a Mass Air Flow (MAF) meter. Technical sources that document this include the Daihatsu Gran Move/Pyzar G30‑series workshop manual (EFI/Engine Control section), the Daihatsu Electronic Parts Catalogue (EPC) for G303/G313 models, and independent service data sets such as Autodata/Autoinfo for 1997–2002 Gran Move. These list a MAP sensor (often Denso type with a vacuum hose) and do not list an air flow meter/MAF for this vehicle.

Why no MAF? Daihatsu’s small-capacity engines of this era commonly use Denso ECUs that calculate air mass from MAP, IAT and engine speed (plus throttle and O2 feedback). This keeps the intake layout simple, trims cost and improves durability in dusty Aussie and Kiwi conditions where a delicate hot‑wire MAF can be more vulnerable. It also means fewer parts in the intake snorkel and less hassle when swapping airboxes or snorkels.

What should owners service instead? On the Gran Move, attention should go to the MAP sensor and the vacuum hose feeding it, the throttle body, PCV system and any intake hoses that can split and cause unmetered air or dodgy idle. If it’s hunting at idle, using more fuel than usual, or throwing P0105–P0108 codes, check for vacuum leaks first, then test the MAP sensor output and ensure the IAT reading is plausible. There’s no MAF to clean or replace because the system doesn’t use one.

• Typical layout: MAP sensor mounted on the firewall or inner guard with a short vacuum hose to the manifold, IAT in the airbox or intake duct.
• Good practice at service time: replace any perished vacuum hoses, clean the throttle body and idle air circuit, and confirm ECU grounds are tidy.
• Don’t chase ghosts: “MAF” fault talk online often applies to other brands, the Gran Move’s airflow is inferred, not directly measured.

If a parts site lists a MAF for a 2002 Gran Move, that’s generally a catalogue cross‑up with other Toyota/Daihatsu models that do use a MAF. For the Gran Move, stick with MAP/IAT diagnostics and you’ll be on the right track.

Popular questions about 2002 Daihatsu Gran Move “MAF” issues

Does a 2002 Daihatsu Gran Move have a MAF sensor?
No. The Gran Move’s Denso EFI uses a MAP sensor and IAT to calculate airflow. Factory manuals and EPC listings for G30‑series cars don’t include a MAF. If you’re fault‑finding rough running, look to the MAP circuit, vacuum leaks, and throttle body before anything else.

Where is the MAP sensor and how is it maintained?
It’s typically on the firewall or inner guard with a vacuum hose to the inlet manifold. Keep the hose crack‑free, ensure tight fittings, and clean the throttle body. If you suspect the MAP, verify its 5V reference, ground, and signal voltage changes with vacuum before replacing it.

My scan tool shows “MAF” terms—should I worry?
Many scanners use generic airflow labels. On this car, airflow is inferred from MAP. If you see airflow‑related issues, check for P0105–P0108 (MAP circuit) and address vacuum leaks, MAP readings, and IAT plausibility rather than hunting for a non‑existent MAF.