Parts for your 2009 Suzuki Splash-Temperature sensors

2009 Suzuki Splash Temperature Sensors — What they do and how to look after them

Temperature sensors are absolutely used on the 2009 Suzuki Splash. Factory and trade sources list an engine coolant temperature (ECT) sensor and an intake air temperature (IAT) sensor as core inputs to the engine control module, with additional temperature sensors for ambient and A/C systems depending on spec. Relevant technical references include the Suzuki Splash factory service manual (Engine Control/System Diagnostics sections), Autodata Technical Data for Suzuki Splash 2008–2014, and the Maruti Suzuki Ritz workshop documentation (mechanically equivalent model).

The Splash relies on temperature sensors to run sweet as. The ECT sensor tracks coolant temperature so the ECU can set cold-start enrichment, ignition timing and radiator fan operation, while the IAT sensor lets the ECU compensate fuelling for hot or cold intake air. Many cars also have an ambient sensor for the dash display and climate control, plus an A/C evaporator sensor to prevent icing. If fitted with an auto, a transmission fluid temp sensor may be present too. Look after these and the Splash rewards with better economy, smoother starts and proper cooling fan behaviour.

There’s no fixed replacement interval, but they’re worth a check at major services. Good practice includes:

• Scan live data: compare ECT to a cold ambient reading, then verify it warms steadily to normal operating temp.
• Inspect connectors for green corrosion, brittle plastics or oil/coolant contamination.
• Keep the cooling system healthy: correct coolant, no airlocks, sound thermostat and radiator cap.

Common symptoms of a dodgy sensor or circuit include:

• Hard cold starts, high idle or rough running
• Poor fuel economy, black exhaust soot
• Cooling fans stuck on or never coming on
• Warning light and codes such as P0115–P0119 (ECT) or P0110–P0113 (IAT)

Replacement tips (ECT):

1. Let the engine cool completely, then partially drain coolant.
2. Unplug the connector, remove the sensor, and fit the new one with the correct sealing washer/O-ring as specified (avoid sealant unless the manual specifies it).
3. Torque to spec, refill with the right coolant mix, bleed air, clear codes and verify fan operation and live data.

Replacement tips (IAT): often clipped into the intake duct or integrated into a MAF/MAP assembly. If it’s a standalone probe, it’s usually a quick swap, if integrated, the whole sensor assembly may need replacing.

Typical parts cost in AU/NZ: IAT $40–$120, ECT $50–$160. Labour varies from 0.3–0.7 hr (IAT) to 0.5–1.0 hr (ECT) plus coolant. Use quality OEM or reputable aftermarket parts, and don’t forget a test drive with a scan tool to confirm temps and closed-loop operation are on point.

Popular question: Where is the engine coolant temperature sensor on a 2009 Suzuki Splash?

It’s typically located near the thermostat housing or coolant outlet on the cylinder head, with a two‑pin plug. Exact placement varies by engine variant, so a quick look under the bonnet for the small sensor on the coolant passage usually finds it, or check the factory service diagram.

Popular question: Can they drive with a faulty temperature sensor?

It might run, but it’s not wise. The ECU may enrich fuel, run the fan constantly or not at all, and risk poor economy or overheating. Fix it promptly to avoid bigger headaches.

Popular question: Does the Splash have more than one temperature sensor?

Yes. Beyond the ECT and IAT, many trims have an ambient sensor for the display/climate, and some have an A/C evaporator sensor. Autos may also monitor transmission fluid temperature.