Component Inspection

P0112 Intake Air Temperature Sensor 1 Circuit Low Input

Inspection/Repair - Component Inspection

Component Inspection

1. Check IATS resistance
(1) IG "OFF".
(2) Disconnect IATS connector.
(3) Measure resistance between terminal 3 and 4 of IATS connector. (Component Side)
A. Specification :









(4) Is the measured resistance within specification?
YES
1) Go to "Check ECM" as follows.
NO
1) 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 disconnect MAFS/MAPS connector.
(2) Connect scantool and Key "ON".
(3) Select simulation function on scantool.
(4) Simulate voltage at terminal 3 of IATS signal connector.




(5) Does the signal value of IATS change according to simulation voltage?
YES
1) 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
1) 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 PCM.
Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others