Quantum Syncro AWD L5-2226cc 2.22L SOHC (1987)
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connect multimeter US 1119 to both terminals of throttle switch harness connector, set meter to ohms scale
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throttle in idle position = 0.0 ohms (continuity) throttle slightly open = infinity ohms (open)
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connect multimeter US 1119 between terminal 13 of relay socket 11 and thermoswitch wire (brown/ black)
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0.0 ohms (continuity)
If resistance OK but idle stabilization NOT OK (engine speed varies):
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replace control unit
Note
Quantums, model year 1984, use a separate control unit for the idle stabilizer valve. Part numbers:
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Automatic transmission 443 907 393 K
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Manual transmission 443 907 393 J
CAUTION
Part numbers are for reference only. Consult your Parts Department for the latest information.
Idle stabilization, model years 1985-1987
Requirements
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Engine oil temperature minimum 80~C (176~F)
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Ignition timing OK
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A/C switched OFF
