Dodge ZB 2005 Service Manual page 1162

Symptom:
P0118-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO HIGH
When Monitored and Set Condition:
P0118-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO HIGH
When Monitored: With the ignition on and battery voltage greater than 10.4 volts.
Set Condition: The Engine Coolant Temperature (ECT) Sensor circuit voltage at the PCM
goes above 4.94 volts for more than 3 seconds.
ECT VOLTAGE ABOVE 4.9 VOLTS
ECT SENSOR
(K2) ECT SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K2) ECT SENSOR SIGNAL CIRCUIT OPEN
(K900) SENSOR GROUND CIRCUIT OPEN
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
With the DRBIII , read ECT voltage.
Is the voltage above 4.9 volts?
Yes → Go To 2
No
2 Turn the ignition off.
Disconnect the ECT harness connector.
Ignition on, engine not running.
Connect a jumper wire between the (K2) ECT Sensor Signal circuit and the (K900)
Sensor ground circuit in the ECT harness connector.
With the DRBIII , read the ECT voltage.
Is the voltage below 1.0 volt?
Yes → Replace the ECT Sensor.
No
NOTE: Remove the jumper wire before continuing.
POSSIBLE CAUSES
ACTION
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 3
DRIVEABILITY - GAS
41
APPLICABILITY
All
All