Dodge ZB 2005 Service Manual page 1156

Symptom:
P0112-INTAKE AIR TEMP SENSOR VOLTAGE TOO LOW
When Monitored and Set Condition:
P0112-INTAKE AIR TEMP SENSOR VOLTAGE TOO LOW
When Monitored: With the ignition on and battery voltage greater than 10.4 volts.
Set Condition: The Intake Air Temperature (IAT) Sensor circuit voltage at the PCM goes
below 0.8 of a volt.
IAT SENSOR VOLTAGE BELOW 1.0 VOLT
IAT SENSOR
(K21) IAT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(K21) IAT SENSOR SIGNAL SHORTED TO (K900) SENSOR GROUND CIRCUIT
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
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 (Diagnos-
No
2 Turn the ignition off.
Disconnect the Intake Air Temp Sensor 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 PCM harness connectors.
Measure the resistance between ground and the (K21) IAT Sensor Signal circuit at
the IAT Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the (K21) IAT Sensor Signal circuit.
→ Go To 4
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
35
APPLICABILITY
All
All
All