ISCA visual check
Key "OFF".
Disassemble ISCA.
Check contamination, damage or stuck on ISCA.
Check the operating sound when key turns "OFF" to "ON".
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)
Specification :
Temperature(℉) | Closing Coil Resistance (Ω) | Opening Coil Resistance (Ω) |
68~95 | 15.4±0.8 | 11.9±0.8 |
Is the measured resistance within specifications ?
YES
Substitute with a known - good ECM and check for proper operation.
If the problem is corrected, replace ECM 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.
