FE639 L4-3.9L DSL Turbo (1998)
[1] Inspection of idling speed adjustment potentiometer
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Disconnect the harness A of the idling speed adjustment potentiometer 1 from the cab-side harness B. Then, connect an inspection harness C
between harnesses A and B. (The inspection harness must be made specially for this procedure, but is not necessary with MUT II PLUS tester.)
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Turn the starter switch to the ON position.
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Check the output voltages of the idling speed adjustment potentiometer 1 in accordance with the following table.
Output characteristics
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If the output voltages are out of specification, replace the idling speed adjustment potentiometer 1.