DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 39

P0110-INTAKE AIR TEMP SENSOR CIRCUIT SIGNAL VOLTAGE TOO
HIGH —
Continued
TEST
3 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the IAT Sensor harness connector.
Measure the resistance of the Intake Air Temperature Sensor Signal circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 4
→ Repair the Intake Air Temperature Sensor Signal circuit for an
No
4 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Connect a jumper wire between the IAT Sensor Signal and IAT Sensor Ground
circuits in the IAT Sensor harness connector.
Turn the ignition on.
Monitor the DRB for ECM DTCs.
Does the DRB display P0110 INTAKE AIR TEMP. SENSOR CIRCUIT SIGNAL
VOLTAGE TOO LOW?
Yes → Replace the Intake Air Temperature Sensor.
→ Go To 5
No
5 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Sensor Ground circuit between the ECM harness
connector and the IAT Sensor harness connector.
Is the resistance below 10.0 ohms?
Yes → Replace and program the Engine Control Module in accordance
→ Repair the Intake Air Temperature Sensor Ground circuit for an
No
ACTION
open.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
open.
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
31
APPLICABILITY
All
All
All