Dodge ZB 2005 Service Manual page 1160

Symptom:
P0117-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO LOW
When Monitored and Set Condition:
P0117-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO LOW
When Monitored: With the ignition on and battery voltage greater than 10.4 volts.
Set Condition: The Engine Coolant Temperature (ECT) Signal circuit voltage at the PCM
goes below 0.8 of a volt for more than 3 seconds.
ECT VOLTAGE BELOW 1.0 VOLT
ECT SENSOR
(K2) ECT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(K2) ECT SENSOR SIGNAL CIRCUIT 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 ECT Sensor voltage.
Is the ECT Sensor voltage below 1.0 volt?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
2 Turn the ignition off.
Disconnect the ECT harness connector.
Ignition on, engine not running.
With the DRBIII , read ECT voltage.
Is the voltage above 1.0 volt?
Yes → Replace the ECT Sensor.
→ Go To 3
No
3 Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the (K2) ECT Sensor Signal circuit at
the ECT Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the (K2) ECT 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
39
APPLICABILITY
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All
All