Parts for your 1987 Suzuki Swift-Temperature sensors

1987 Suzuki Swift temperature sensors

Yes, the 1987 Suzuki Swift uses temperature sensors. The factory service literature for the first‑gen SA/AA Swift (Engine Cooling and EFI sections), common workshop manuals (e.g., Haynes for Suzuki Swift of the era), and the Suzuki Electronic Parts Catalogue all identify a coolant temperature sender for the dash gauge, a thermo fan switch for the radiator fan, and—on EFI‑equipped variants—an engine coolant temperature (ECT) sensor for the ECU. Even carb models need a sender for the gauge and a thermo‑switch to trigger the electric fan, so temperature sensors are very much part of the car’s design.

On this Swift, temperature sensors do a few simple but crucial jobs. The dash sender feeds the gauge so the driver can see if the engine’s running hot or cold. The radiator fan switch turns the fan on and off at set temperatures to keep things tidy under the bonnet, especially in Aussie and Kiwi summers or slow traffic. If the car has EFI, the ECT sensor tells the ECU how warm the engine is, so it can sort cold‑start enrichment, idle speed and fuelling. When any of these go out of whack, the Swift can be hard to start, drink more petrol than it should, run rough, or overheat because the fan doesn’t cut in.

As part of routine servicing, it’s worth giving the temperature‑sensor system a quick once‑over:

• Check the gauge behaves normally from cold to operating temperature and that the fan kicks in after a few minutes idling when hot.
• Inspect connectors and earths for corrosion, green crust, or broken clips—old plastics get brittle.
• If the coolant’s due (two years is a good rhythm), flush and refill with the correct spec, poor coolant can skew sensor readings and seize fan switches.
• Test suspect sensors with a multimeter against the service‑manual resistance/temperature chart, or bench‑test the fan switch in hot water.

Replacement is straightforward: disconnect the battery, drain enough coolant below sensor level, undo the sender or switch, swap the sealing washer or O‑ring, and refit. Use a dab of the correct sealant only if the manual specifies it, and tighten to the workshop torque spec—over‑tightening can crack housings. Refill, bleed out air, then confirm the gauge and fan operate as they should. For EFI models, clearing ECU adaptations isn’t usually needed, but a quick road test and warm idle check is smart.

Where is the coolant temperature sensor on a 1987 Suzuki Swift?

Most 1987 Swift engines place the dash gauge sender on or near the thermostat housing, and the radiator fan thermo‑switch on the radiator tank or lower hose outlet. EFI versions also have an ECT sensor on the intake side of the head or thermostat housing. Exact location varies by engine (G10 1.0L vs G13 1.3L), so a glance at the housing and radiator fittings will usually spot them.

How can someone tell if the temp sensor or fan switch is faulty?

Common clues include a dead or wildly erratic gauge, the fan never coming on (or running constantly), hard cold starts, rich fuel smell, or poor fuel economy. A quick test is to warm the car at idle and watch for the fan to engage once the gauge reaches mid‑range. A multimeter test against the manual’s temperature‑to‑resistance specs will confirm if the sensor or switch is out of range.

Does a carburetted 1987 Swift still have temperature sensors?

It does. Carb models have a sender for the dash gauge and a separate thermo‑switch for the electric fan. They don’t have the ECU‑type ECT sensor unless fitted with EFI, but they still rely on temperature inputs to protect the engine and inform the driver.