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Component Inspection

ISCA visual check.
1. Key "OFF".
2. Remove ISCA.
3. Check contamination, damage or stuck on ISCA.
4. Check the operating sound when key turns "OFF" to "ON".
5. Is ISCA O.K?
  YES : --> Go to "ISCA check" procedure.
  
  NO : --> Substitute with a known - good ISCA and check for proper operation.
  
  --> If the problem is corrected, replace ISCA and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

ISCA check.

Key "OFF".
Disassemble ISCA.
Measure the resistance between terminal 1 and 2 of ISCA harness connector. (Component side)

Measure the resistance between terminal 2 and 3 of ISCA harness connector. (Component side)

IDLE SPEED CONTROL ACTUATOR SPECIFICATION

Temperature		Closing Coil Resistance (Ω)	Opening Coil Resistance (Ω)
°C	°F	Closing Coil Resistance (Ω)	Opening Coil Resistance (Ω)
20 ~ 35	68 ~ 95	14.6 ~ 16.2Ω	11.1 ~ 12.7Ω

Fig 1: Measuring Resistance Between Terminal 1 And 2 Of ISCA Harness Connector

G04801798

Is the measured resistance within specifications?
YES : --> Substitute with a known - good ECM/PCM and check for proper operation.

--> If the problem is corrected, replace ECM/PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

NO : --> Substitute with a known - good ISCA and check for proper operation.

--> If the problem is corrected, replace ISCA and go to "VERIFICATION OF VEHICLE REPAIR " procedure.