Parts for your 2001 Daihatsu Yrv-Temperature sensors

2001 Daihatsu YRV Temperature Sensors — What They Do and How to Look After Them

Temperature sensors are absolutely fitted to the 2001 Daihatsu YRV and are central to how it runs. The K3-VE (1.3L) and K3-VET (1.3L turbo) engines use an engine coolant temperature (ECT) sensor and an intake air temperature (IAT) sensor to feed the ECU with live data. That info steers fuelling, ignition timing, fan control and cold-start behaviour.

• Technical sources referenced: Daihatsu YRV Workshop/Service Manual for K3-VE/K3-VET EFI systems (ECT and IAT sensor identification, specs and ECU pins).
• Daihatsu diagnostic trouble codes applicable to YRV: P0110–P0114 (IAT circuit) and P0115–P0119 (ECT circuit), confirming the sensors are monitored by the ECU.
• Australian/NZ service data (Autodata/Autoinfo) for 2001 YRV: shows ECT on the thermostat housing/cylinder head and IAT in the air intake tract, with test values and replacement guidance.

On a 2001 Daihatsu YRV, the temperature sensors quietly handle a heap of important jobs. The ECT tracks coolant temp so the ECU can sort cold starts, warm-up enrichment, fan operation and knock control. The IAT helps the ECU fine-tune fuelling as air density shifts with ambient conditions. When either goes out of spec, the YRV can chew more fuel, idle rough, feel doughy off the line, kick the fan in at odd times, or light the check engine lamp.

They’re not scheduled “replace-at-X-kilometres” items, but they are worth checking any time there’s cooling system work, a MIL light, or odd temperature readings. A quick scan-tool sweep is gold: compare ECT to actual engine temp on cold start (both should read ambient) and ensure the rise is smooth as the engine warms. For IAT, compare to ambient