Elantra L4-1595cc 1.6L DOHC (1993)
Idle Speed Control Motor: Testing and Inspection
Circuit Diagram
Troubleshooting Hints
1. If the stepper motor step increases to 100 to 120 steps or decreases to 0 step, check for faulty stepper motor or open circuit in the harness.
2. If the idle speed control motor is normal but the stepper motor steps are out of specification, check the following items;
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Poorly adjusted reference idle speed.
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Deposit on the throttle valve.
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Air leaking into the intake manifold through gasket gap.
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Loose EGR valve seat.
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Poor combustion in the cylinder (faulty ignition plug, ignition coil, injector, low compression pressure, etc.).
Using scan Tool
NOTE: When the vehicle is new (within initial operation of about 300 miles), the stepper motor steps may be about 30 steps more than standard.
