Parts for your 2013 Daihatsu Bego-Temperature sensors

2013 Daihatsu Bego Temperature Sensors

Temperature sensors are definitely used on the 2013 Daihatsu Bego (J200/J210 series, also known as Toyota Rush). Factory literature describes several sensors, including the engine coolant temperature (ECT) sensor for the 3SZ‑VE 1.5‑litre petrol engine, an intake air temperature (IAT) sensor, ambient temperature for HVAC, and, on automatic models, transmission fluid temperature. References include the Daihatsu Terios/Bego J200 Series Repair Manual (Engine Control System), Toyota 3SZ‑VE Engine Repair Manual (EFI), DENSO engine control sensor documentation, and the OBD‑II standard DTC set (P0115–P0119 for ECT circuit faults).

On this Bego, temperature sensors are the quiet achievers that let the ECU run the engine sweetly from a cold start to a hot summer cruise. The ECT sensor tells the computer exactly how warm the coolant is, so it can set fuel mixture, ignition timing, idle speed, and cooling fan operation. The IAT sensor reports the incoming air’s temperature, which helps fine‑tune fuelling and emissions. Cabin and ambient temperature inputs keep the air‑con behaving as expected, and autos use fluid temperature to protect the transmission under load.

When a temperature sensor goes off song, owners may notice cold start fussiness, a high idle that hangs on too long, grumpy fuel economy, the radiator fan running at odd times, a lifeless heater, or a temp gauge that doesn’t make sense. The check engine light and codes like P0115–P0119 for the ECT, or IAT‑related codes, are common tip‑offs.

As part of routine servicing, a quick scan‑tool check of live data is gold: look for believable coolant warm‑up from ambient to operating temp (roughly 85–95°C) and reasonable IAT readings close to ambient at first start. Inspect connectors for corrosion or broken locking tabs, and make sure harnesses aren’t chafing near the thermostat housing. If replacing the ECT sensor, use an OEM‑quality part, swap the sealing washer or O‑ring, and refill/bleed the coolant with the correct spec. Never crack the system when it’s hot under the bonnet. For the IAT, clean only if the manufacturer permits, otherwise replace—sprays can ruin some elements. After any replacement, clear codes and verify the fix with another live‑data check and a proper road test.

• Watch for unexplained fan operation, poor economy, and hard cold starts.
• Use a scan tool to compare ECT/IAT against ambient, big mismatches point to faults.
• Tighten to the workshop manual’s torque and don’t overtighten into alloy housings.

Popular questions about 2013 Daihatsu Bego temperature sensors

Where is the coolant temperature sensor on a 2013 Bego?
It’s typically threaded into the coolant passage near the thermostat housing on the cylinder head or intake side of the 3SZ‑VE. Look below the upper radiator hose area for a small two‑pin sensor. Access is from the top with the engine cover off, on some cars, removing the intake duct makes it easier.

What fault codes point to a bad coolant temp sensor?
Common ECT‑related OBD‑II codes are P0115 (circuit), P0116 (range/performance), P0117 (low input), P0118 (high input), and P0119 (intermittent). Before replacing the sensor, check wiring integrity and coolant level, because a low coolant condition can skew readings and set similar codes.

Is the intake air temperature sensor separate from the MAF on this model?
On many 2013 Bego/Rush models, the IAT is integrated with the mass airflow sensor in the airbox duct. If intake temperature readings are implausible and the wiring checks out, the fix is often to replace the MAF/IAT assembly rather than a standalone IAT.