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DRIVEABILITY - NGC
Symptom:
P0118-ENGINE COOLANT TEMPERATURE SENSOR HIGH
When Monitored and Set Condition:
P0118-ENGINE COOLANT TEMPERATURE SENSOR HIGH
When Monitored: With the ignition on. Battery voltage greater than 10 volts.
Set Condition: The Engine Coolant Temperature (ECT) sensor voltage at the PCM is
greater than 4.98 volts. One trip Fault.
ECT SENSOR VOLTAGE ABOVE 4.9 VOLTS
(K2) ECT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
ECT SENSOR INTERNAL FAILURE
(K2) ECT SIGNAL CIRCUIT OPEN
(K4) SENSOR GROUND CIRCUIT OPEN
PCM
TEST
1
Ignition on, engine not running.
With the DRBIII , read the ECT Sensor voltage.
Is the voltage above 4.9 volts?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2
Turn the ignition off.
Disconnect the ECT Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K2) ECT Signal circuit in the ECT Sensor harness
connector.
Is the voltage above 5.2 volts?
Yes → Repair the short to battery voltage in the (K2) ECT Signal circuit.
→ Go To 3
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
284
APPLICABILITY
All
All
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