DaimlerChrysler Jeep Grand Cherokee 2002, Service Manual

Page: 38 / 284

Symptom:
P0110-INTAKE AIR TEMP SENSOR CIRCUIT SIGNAL VOLTAGE
TOO HIGH
When Monitored and Set Condition:
P0110-INTAKE AIR TEMP SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH
When Monitored: With the ignition on.
Set Condition: The Intake Air Temperature Sensor Signal voltage is above 4.83 volts.
POSSIBLE CAUSES
INTERMITTENT CONDITION
INTAKE AIR TEMP SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
INTAKE AIR TEMP SENSOR GROUND CIRCUIT OPEN
INTAKE AIR TEMP SENSOR SIGNAL CIRCUIT OPEN
IAT SENSOR
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, erase ECM DTCs.
Monitor the DRB for ECM DTCs.
Did this DTC set again? All
Yes
→
Go To 2
No
→
Go To 6
2 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage on the IAT Sensor Signal circuit.
Is the voltage below 1.0 volt? All
Yes
→
Go To 3
No
→
Repair the Intake Air Temperature Sensor Signal circuit for a
short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
NOTE: Remove the jumper wire.
30
DRIVEABILITY - DIESEL
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