Parts for your 1996 Daihatsu Gran move-Map sensor

1996 Daihatsu Gran Move MAP sensor: purpose, servicing tips, and common questions

Based on the Daihatsu G300-series (Pyzar/Gran Move) workshop manual EFI section and typical Denso speed‑density EFI used by Daihatsu in the mid‑90s, the 1996 Daihatsu Gran Move is fitted with a Manifold Absolute Pressure (MAP) sensor. In Daihatsu literature it’s often called a “pressure sensor (PS)”, either mounted externally (usually on the firewall/strut tower with a vacuum hose to the inlet manifold) or integrated into the ECU with a short vacuum line to the ECU body. These sources confirm the MAP sensor is a core load input for fuelling and ignition on this model.

The Gran Move’s MAP sensor is a small but crucial bit of kit. It measures the absolute pressure inside the intake manifold so the ECU can figure out engine load and calculate the right amount of fuel and ignition timing. On this Daihatsu, the EFI strategy is speed‑density, which means the MAP sensor teams up with RPM, intake air temp, and throttle position to keep things running sweet from cold starts to highway kays. When the MAP reading goes wonky, expect rough idle, flat spots, thirsty fuel use, and a whiff of soot from over‑fuelling.

Servicing is straightforward and well within a weekend spanner‑spinner’s reach. Most cars have the MAP mounted to a bracket with a vacuum hose to the manifold, some markets have the pressure sensor inside the ECU with a dedicated hose—so always check that hose first. Brittle, oil‑soaked, or cracked vacuum lines are the number‑one culprit and cost peanuts to fix. The electrical side is simple too: a good clean of the connector, ensure the harness isn’t chafed, and check for a solid earth. If scanning, look for load/pressure that makes sense—KOEO should read near atmospheric (~100 kPa), and at warm idle you’ll typically see 30–45 kPa.

Replacing a tired MAP sensor is usually a 15–30 minute job:

• Label and replace the vacuum hose if it’s the least bit suspect.
• Swap the sensor, fit a fresh O‑ring if applicable, and don’t over‑tighten the screws into plastic brackets.
• Clear any fault codes (common ones are P0105–P0108 on OBD‑equipped variants) and take a short drive to let trims settle. No special relearn is typically required.

As part of routine servicing on a 1996 Gran Move, it’s smart to inspect the MAP hose and connector every 12 months, keep the throttle body and vacuum ports clean, and make sure the PCV system isn’t oil‑fogging the inlet. Look after the plumbing and the sensor will usually look after itself.

• Where is the MAP sensor on a 1996 Daihatsu Gran Move, and how do you spot it?
  Most cars have it mounted on the firewall or a strut tower—small rectangular Denso‑style unit with a single vacuum hose to the manifold and a 3‑pin plug. Some versions place the pressure sensor inside the ECU, in those, you’ll see a short vacuum hose running directly to the ECU housing behind the glovebox. If there’s no standalone sensor under the bonnet, inspect that ECU hose.
• How can you test the MAP sensor at home?
  With a scan tool, check MAP kPa at key‑on (near 100 kPa) and at warm idle (roughly 30–45 kPa). If readings don’t change when you blip the throttle, suspect the hose or sensor. With a multimeter on older setups, the signal wire is about 4.0–4.8 V KOEO and 1.0–2.0 V at idle. A handheld vacuum pump on the sensor port should show smooth, proportional change.
• Do you need to reset the ECU after replacing the MAP sensor?
  Generally no special procedure—clear any stored codes, then take a short drive so fuel trims can relearn. If the sensor is ECU‑integrated, make sure the vacuum hose to the ECU is airtight, a leak there will mimic a failed sensor.