Component Inspection

Component Inspection

1. Check IATS
(1) IG "OFF" and disconnect IATS connector.
(2) Measure resistance between terminal 4 and 5 of IATS connector. (Component side)
A. Specification :









(3) Is the measured resistance within specification?
YES
- Go to "Check ECM" as follows.
NO
- Substitute with a known-good IATS and check for proper operation. If the problem is corrected, replace IATS and go to "Verification of Vehicle Repair" procedure.
2. Check ECM
(1) IG "OFF" and connect scantool.
(2) Disconnect IATS connector and connect probe to terminal 4 of IATS harness connector.
(3) IG "ON" and ENG "OFF" and simulation Function on scantool.
(4) Simulate voltage at terminal 4 of IATS harness connector.




(5) Does the signal value of IAT sensor change according to simulation voltage?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
- 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.

CAUTION:
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by ECM. Before or after testing ECM on the vehicle, use this function to reuse the ECM on the others.