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) |
20~35 | 15.4±0.8 | 11.9±0.8 |
Is the measured resistance within specifications ?
YES
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary 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.
