Chrysler Concorde 2004 Service Manual page 725

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.
IAT SENSOR VOLTAGE BELOW 1.0 VOLT
IAT SENSOR INTERNAL FAILURE
(K21) IAT SIGNAL SHORTED TO GROUND
(K21) IAT SIGNAL SHORTED TO (K4) SENSOR GROUND CIRCUIT
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read the IAT Sensor voltage.
Is the voltage below 1.0 volt?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2 Turn the ignition off.
Disconnect the IAT harness connector.
Ignition on, engine not running.
With the DRBIII , read IAT Sensor 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 (K21) IAT Signal circuit at the IAT
Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the (K21) IAT Signal circuit.
→ Go To 4
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
DRIVEABILITY - NGC
67
APPLICABILITY
All
All
All