SW1 L4-1.9L SOHC VIN 8 (1996)
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If engine is at ambient temperature (vehicle has been sitting overnight or not started for several hours), use a Scan tool to compare the inlet air
temperature (IAT) to the engine coolant temperature (ECT). These two readings should be within 2°C (4°F) of each other.
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If engine is at operating temperature, install a thermometer in the coolant recovery reservoir. With the engine running and A/C off, use a Scan
tool to compare the engine coolant temperature sensor reading to the thermometer reading. These two readings should be within 8°C (15°F) of
each other.
If engine coolant temperature sensor reading does not pass either of the above tests, continue with next step.
If engine coolant temperature sensor reading passes both of the tests above, refer to appropriate symptom diagnostic chart in the Engine/Emissions
Controls Section of applicable Engine Service Manual.
3.
Turn ignition off.
4
Remove coolant surge tank cap.
CAUTION:
DO NOT REMOVE CAP OR OPEN COOLING SYSTEM DRAINS FROM A HOT SYSTEM. ALLOW SYSTEM TO COOL FIRST.
5.
Drain at least 1.9 L (2 Qt.) of engine coolant from the cooling system by opening radiator drain valve or removing engine drain plug. Collect
engine coolant in a container.
6.
Disconnect engine coolant temperature sensor electrical connector.
7.
Remove engine coolant temperature sensor from cylinder head.
8.
Obtain replacement engine coolant temperature sensor (P/N 21025106).
