IG KEY : OFF , Engine : OFF
Disconnet IAT sensor connector(C55).
Measure resistence between terminals 4 and 5 of the IAT sensor connectorC55.
Specification :
Temperature ℃(℉) | -40(-40) | -30(-22) | -20(-4) | 0(32) | 20(68) | 60(140) | 100(212) | 110(230) | 120(248) |
Resistence(kΩ) | 45.3 | 25.6 | 15.1 | 5.8 | 2.5 | 0.6 | 0.19 | 0.16 | 0.13 |
Voltage(V) | 4.48 | 4.34 | 4.12 | 3.46 | 2.57 | 1.06 | 0.39 | 0.34 | 0.27 |
(Pull up resistance is Approx. 2.2kΩ and above specification’s error range is 2~3%.)
Is IAT sensor normal?
YES
IAT sensor is OK.
Possibility of defective ECM.Temporarily test with a new ECM and check for proper operation.
If problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.
NO
Test with a new IAT sensor and check for proper operation.If problem is corrected, replace it.
And go to "Verification of Vehicle Repair" procedure.
