Chrysler 300M 2002 Service Manual page 2495

DRIVEABILITY - NGC
Symptom:
P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE
When Monitored and Set Condition:
P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE
When Monitored: Engine off time is greater than 480 minutes. Ambient temperature is
greater than 4°C (39°F).
Set Condition: After a calibrated amount of cool down time, the PCM compares the ECT
Sensor, IAT Sensor and the Ambient Air Temperature Sensor values. If the ECT Sensor
value is not within 2°C (18°F) of the other two temperartue sensors an error is detected.
Two Trip Fault.
INTERMITTENT CONDITION
ECT SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
ECT SENSOR VOLTAGE BELOW 1.0 VOLT
ECT SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
ECT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
ECT SENSOR SIGNAL SHORTED TO SENSOR GROUND
PCM HIGH
PCM LOW
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Go To 9
No
2 Turn the ignition off.
Disconnect the ECT Sensor harness connector.
NOTE: Visually inspect both the component and the PCM connectors. Look
for damaged, partially broken wires, and backed out or corroded terminals.
Ignition on, engine not running.
Measure the voltage on the ECT Sensor Signal circuit in the ECT Sensor harness
connector.
Is the voltage above 5.2 volts?
Yes → Repair the short to battery voltage in the ECT Sensor Signal
→ Go To 3
No
POSSIBLE CAUSES
ACTION
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
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APPLICABILITY
All
All