Chrysler 300M 2002 Service Manual page 2490

Symptom:
P0112-INTAKE AIR TEMPERATURE SENSOR LOW
When Monitored and Set Condition:
P0112-INTAKE AIR TEMPERATURE SENSOR LOW
When Monitored: With the ignition on. Battery voltage greater than 10 volts.
Set Condition: The Intake Air Temperature (IAT) sensor voltage is less than 0.0784 of a
volt. One trip Fault.
INTERMITTENT CONDITION
IAT SENSOR INTERNAL FAILURE
IAT SENSOR SIGNAL SHORTED TO GROUND
IAT SENSOR SIGNAL SHORTED TO SENSOR GROUND CIRCUIT
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read the IAT voltage.
Is the voltage below 1.0 volt?
Yes → Go To 2
→ Go To 6
No
2 Turn the ignition off.
Disconnect the IAT harness connector.
Ignition on, engine not running.
With the DRBIII , read IAT voltage.
Is the voltage above 1.0 volt?
Yes → Replace the IAT Sensor.
→ Go To 3
No
3 Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the IAT Sensor Signal circuit at the IAT
Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the IAT Sensor Signal circuit.
→ Go To 4
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 6.
Perform POWERTRAIN VERIFICATION TEST VER - 6.
DRIVEABILITY - NGC
61
APPLICABILITY
All
All
All