Parts for your 2001 Daihatsu Gran move-Maf sensor

2001 Daihatsu Gran Move MAF sensor — is it used on this model?

Short answer: a mass air flow (MAF) sensor isn’t fitted to the 2001 Daihatsu Gran Move. This model runs a DENSO speed–density engine management system that uses a manifold absolute pressure (MAP) sensor, intake air temperature (IAT) sensor, throttle position sensor (TPS), O2 sensor and crank/cam signals to calculate fuelling. This setup is shown in the Daihatsu Gran Move/Pyzar G300-series workshop manual (EFI section) and Daihatsu’s Electronic Parts Catalogue for the 2001 G30x/G31x variants, which list a MAP sensor assembly and do not list a MAF sensor. The DENSO wiring diagrams for the HC/HD-series engines used in the Gran Move also depict MAP-based load sensing rather than a hot-wire MAF.

Why no MAF? For small-capacity, naturally aspirated Daihatsu engines of this era, the speed–density approach was chosen because it’s compact, cost-effective and robust. There’s no delicate hot wire sitting in the intake stream, and performance is consistent even in dusty or high-vibration conditions common across Aussie and Kiwi roads. With closed-loop O2 feedback, the system easily meets emissions and driveability targets without needing a MAF meter.

Owners sometimes get tripped up because parts sites lump airflow and pressure sensors together. On the 2001 Gran Move, the “airflow” metering is handled by the MAP sensor. If a scan tool flags airflow-related issues, look for MAP codes rather than MAF-specific ones, and focus checks on the vacuum hose to the MAP, the intake tract and the throttle body.

Good servicing habits for this setup include:

• Replace the air filter on schedule, a clogged filter can skew load calculations.
• Inspect the small vacuum hose to the MAP sensor for splits, swelling or loose fits.
• Check for intake leaks after the throttle body, unmetered air will upset fuelling.
• Clean the throttle body and idle air control passage with suitable cleaner.
• If removing the MAP sensor, avoid soaking the sensor port, a light, careful clean of the port and hose is plenty.

If you’ve been searching for a “2001 Daihatsu Gran Move MAF sensor”, the correct part to chase is the MAP sensor (and its hose) because a MAF simply isn’t part of this vehicle’s factory hardware, per Daihatsu’s workshop literature and EPC listings.

Popular questions

Does a 2001 Daihatsu Gran Move have a MAF sensor?
No. This model uses a MAP sensor-based, speed–density EFI system. The factory service manual and parts catalogue list the MAP sensor and do not include a mass air flow meter. If your scan tool mentions “airflow”, read it as MAP/load-related for this car.

Where is the MAP sensor on a 2001 Gran Move?
On most G300-series Gran Move models it’s a small DENSO unit mounted on the firewall or near the strut tower, connected to the inlet manifold by a short vacuum hose. Some variants mount it directly to the manifold. If in doubt, follow the thin vacuum hose from the manifold—where it ends is your MAP sensor.

My scanner shows a MAF fault code—what should I check?
Generic tools sometimes label MAP faults as “MAF.” For this Daihatsu, inspect the MAP sensor hose for cracks or disconnections, check the electrical connector, and look for intake leaks. If the hose and wiring are fine, verify MAP readings and power/earth at the sensor before replacing parts.