TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Measure the resistance of the Intake Air Temperature Sensor Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
4
No
→
Repair the Intake Air Temperature Sensor Signal circuit for an
open.
Perform ROAD TEST VERIFICATION - VER-2.
4
Turn the ignition off.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Connect a jumper wire between the IAT Sensor Signal and IAT Sensor Ground
circuits in the Turbocharger Boost Pressure/IAT Sensor harness connector.
Turn the ignition on.
Monitor the DRB for ECM DTCs.
Does the DRB display P1110 AIR TEMP. SENSOR SRC LOW EXCEEDED?
All
Yes
→
Replace the Turbocharger Boost Pressure/Intake Air Tempera-
ture Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To
5
5
Turn the ignition off.
Disconnect the Turbocharger Boost Pressure/IAT Sensor harness connector.
Turn the ignition on.
Connect a jumper wire between the Intake Air Temperature Sensor Signal circuit
and ground.
Monitor the DRB for ECM DTCs.
Does the DRB display P1110 AIR TEMP. SENSOR SRC LOW EXCEEDED?
All
Yes
→
Repair the Intake Air Temperature Sensor Ground circuit for an
open.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
132
DRIVEABILITY - DIESEL
P1110-AIR TEMP. SENSOR SRC HIGH EXCEEDED —
Continued