P0117-Engine Coolant Temperature Sensor Low - Chrysler Pacifica CS 2004 Service Manual

Symptom:

P0117-ENGINE COOLANT TEMPERATURE SENSOR LOW

When Monitored and Set Condition:
P0117-ENGINE COOLANT TEMPERATURE SENSOR LOW
When Monitored: With the ignition on. Battery voltage greater than 10 volts.
Set Condition: The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM
is less than 0.0782 of a volt. One Trip Fault.
ECT SENSOR VOLTAGE BELOW 1.0 VOLTS
ECT SENSOR INTERNAL FAILURE
(K2) ECT SIGNAL SHORTED TO GROUND
(K2) ECT SIGNAL SHORTED TO (K4) SENSOR GROUND CIRCUIT
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read the ECT 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 ECT harness connector.
Ignition on, engine not running.
With the DRBIII , read ECT Sensor voltage.
Is the voltage between 4.8 and 5.2 volts?
Yes → Replace the ECT Sensor.
→ Go To 3
No
3 Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K2) ECT Signal circuit in the ECT
Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the ground shorted to the (K2) ECT 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
69
APPLICABILITY
All
All
All