DST displays IAT voltage greater than the limit set in calibration; IAT High Voltage
Possible Causes
•Intermittent Problem
•Faulty connection to sensor
•Faulty IAT sensor
•Open IAT ground (5Vrtn1) circuit
•Faulty ECM connection
•Faulty ECM
•Faulty Harness
Suggested Actions
1Perform On-Board (OBD) System Check
2Disconnect IAT sensor from harness and jumper across terminal at connector
3Jumper IAT sensor signal to ground
4Key Off, disconnect wire harness header from ECM, and carefully check resistance between MAP input at ECM header and signal at device (resistance should be <5 ohms)