Parts for your 2017 Suzuki Splash-Temperature sensors

2017 Suzuki Splash Temperature Sensors

Yes, temperature sensors are fitted to the 2017 Suzuki Splash and are highly relevant to how the car runs. This is supported by Suzuki workshop information for Splash/Ritz models with K12B/K10B engines (engine coolant temperature and intake air temperature sensing called out in the engine management section), Suzuki parts catalogues listing ECT and IAT sensors, and OBD‑II diagnostics that include temperature-related PIDs and fault codes (such as ECT DTCs P0115–P0119). These technical sources confirm the Splash relies on temperature inputs for fuelling, ignition timing, fan control, and HVAC behaviour.

On the Splash, the engine coolant temperature (ECT) sensor tells the ECU how hot the engine is so it can adjust cold-start enrichment, idle speed, ignition advance, and switch the radiator fans. The intake air temperature (IAT) sensor helps the ECU judge air density for accurate fuel delivery. There’s also an ambient air temperature sensor for the climate control display and A/C performance. Without accurate temperature data, the car can run rich, idle roughly, trigger the MIL, or kick the fans on at odd times.

There’s no set replacement interval for these sensors—they’re generally replaced on condition. Good servicing practice is to check live data with a scan tool: when the engine is cold, ECT and IAT should read close to ambient, as the engine warms, ECT should climb steadily and the fans should cut in around normal operating temp. Any wild spikes, implausible readings, or DTCs suggest testing or replacement. Always inspect the connector and loom first, heat and coolant can harden O‑rings and brittle the wiring near the thermostat housing.

• When replacing an ECT sensor, depressurise the cooling system, catch spilt coolant, fit a new sealing washer/O‑ring, and top up with the correct Suzuki Super Long Life Coolant (blue) or equivalent. Bleed air from the system afterwards.
• Avoid thread sealants unless specified by the workshop manual, many sensors rely on correct earthing through the body.
• Use OEM or quality aftermarket parts to ensure the correct resistance curve.
• If faults persist after replacement, check grounds, reference voltage (5 V), and compare scan-tool temps to an infrared thermometer at the thermostat housing.

Where is the engine coolant temperature sensor on a 2017 Suzuki Splash?

It’s typically threaded into or near the thermostat housing on the cylinder head side, where coolant exits the engine. Look for a two‑pin electrical connector. Access may be easier from the top with the air intake duct removed.

What symptoms point to a dodgy temperature sensor on a Splash?

Hard cold starts, rough idle, poor fuel economy, black exhaust smoke, radiator fans running constantly or not at all, a temp gauge that seems off, and a check engine light. Scan-tool readings that don’t match ambient when cold are a giveaway.

Does a new ECT sensor need coding?

No special coding is normally required on the Splash. Clear any stored DTCs, verify live data, and ensure the cooling system is properly bled so the sensor sees true coolant flow and temperature.