Mazda 323 1988 Workshop Manual page 355

Mazda 323 1988

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1. Remove the switch from the radiator.

2. Place the switch in water with a thermometer and

heat the water gradually.

3. Check that the continuity between the terminals

exists at more than specification.

Specification:

4. If not correct, replace the water therm0 switch.

1. Warm up the engine and run it at idle.

2. Disconnect the oxygen sensor wiring harness con-

Attach a voltmeter between the oxygen sensor con-

nector (oxygen sensor side) and ground.

4. Run the engine speed at 4,000 rpm until the volt-

meter indicates about 0.7

5. increase and decrease the engine speed quickly

is increased

read between

When the speed is decreased it should read be-

6. If the voltmeter doesn't indicate above mentioned

values, replace the

Revised IO/87

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