TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Ignition on, engine not running.
With the DRBIIIt, read the IAT Sensor voltage.
Is the voltage above 4.9 volts?
All
Yes → Go To 4
No → Go To 7
4 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Using a jumper wire, jumper across the IAT Sensor harness connector.
Ignition on, engine not running.
With the DRBIIIt, read the IAT Sensor voltage.
Is the voltage below 1.0 volt?
All
Yes → Replace the IAT Sensor.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 5
5 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K21) IAT Signal circuit from the IAT Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes → Go To 6
No → Repair the open in the (K21) IAT Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
6 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K4) Sensor ground circuit from the IAT Sensor
harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes → NOTE: Before continuing, check the PCM harness connector
terminals for corrosion, damage, or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Repair the open in the (K4) Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
60
DRIVEABILITY - NGC
P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE —
Continued
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