P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on.
Set Condition:
The (K2) Engine Coolant Temperature Sensor Signal circuit voltage is above 4.75 volts for 0.48 seconds.

Possible Causes

INTERMITTENT DTC

(K2) ENGINE COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

(K915) ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE

(K2) ENGINE COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

(K915) ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

ENGINE COOLANT TEMPERATURE SENSOR

ENGINE CONTROL MODULE (ECM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

1.DTC IS ACTIVE

Is the status Active for this DTC?

Yes

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.(K2) ENGINE COOLANT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

Is there any voltage present?

Yes

Repair the (K2) Engine Coolant Temperature Sensor Signal circuit for a short to voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

3.(K915) ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE

NOTE: The jumper wire should still be in place.

Is there any voltage present?

Yes

Repair the (K915) Engine Coolant Temperature Sensor Ground circuit for a short to voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

4.ENGINE COOLANT TEMPERATURE SENSOR

NOTE: Remove the jumper wire.

NOTE: The scan tool should display an Engine Coolant Temperature Sensor low voltage or short to ground DTC with the jumper wire in place.

Does the scan tool display the DTC(s) as described above?

Yes

Replace the Engine Coolant Temperature Sensor in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

5.(K2) ENGINE COOLANT TEMPERATURE SENSOR SIGNAL OPEN OR HIGH RESISTANCE

Is the resistance below 10.0 ohms?

Yes

Repair the (K2) Engine Coolant Temperature Sensor Signal circuit for an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

6.(K915) ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 10.0 ohms?

Yes

Repair the (K915) Engine Coolant Temperature Sensor Ground circuit for an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

7.ENGINE CONTROL MODULE (ECM)

Were any problems found?

Yes

Repair as necessary.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Replace the Engine Control Module (ECM) in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)