See Figures 1, 2, 3, 4 and 5
- Remove the coolant temperature sender from the engine.
- Position the sender in a container of water on your stove, as shown in the accompanying illustration.
Refer to the accompanying charts for the approximate resistance at varying temperatures.
- Using an ohmmeter, measure and note the sender terminal-to-sender metal housing resistance.
- Slowly heat the water in the container and observe the sender resistance exhibited on the ohmmeter. The resistance of the sender should smoothly and steadily decrease as the water temperature increases.
- If the sender resistance does not react as noted, replace the sender with a new one.
REMOVAL & INSTALLATION
See Figures 6 and 7
On 1.3L and 1.6L engines, the coolant temperature sender is mounted in the front of the intake manifold. On the 1.8L engine, the sender is mounted next to the water outlet cap.
- Disconnect the negative battery cable.
- Label and detach the wire from the sender unit.
- Drain the cooling system until the coolant level is below the sender.
- Remove the sender with an open end wrench.
- Clean the sender threads, then wrap Teflon® pipe sealing tape around the sender threads.
- Install the sender by hand, then tighten the sender to 71 inch lbs. (8 Nm).
- Reattach the sender wire.
- Connect the negative battery cable, and refill the cooling system.