Test Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

K1 PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODES (DTCS) P0117 OR P0118

Carry out a visual inspection.
Retrieve and record all DTCs.
Record the freeze frame data.
Clear all the DTCs.
Carry out the on-demand self-test.

Are DTCs P0117 or P0118 present?

Yes	No
For DTC P0117, GO to K2. For DTC P0118, GO to K4.	UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the concern. REPAIR as necessary. REFER to SYMPTOM CHARTS , if a driveability concern exists.

K2 DIAGNOSTIC TROUBLE CODE (DTC) P0117

Possible causes:
- ECT signal circuit ground short
- ECT sensor
- PCM
Key in OFF position.
ECT Sensor connector disconnected.
The ECT sensor is disconnected to simulate the opposite DTC.
Key ON, engine OFF.
Carry out the KOEO on-demand self-test.

Is DTC P0118 present?

Yes	No
INSTALL a new ECT sensor. CLEAR the DTCs. REPEAT the self-test.	GO to K3.

K3 CHECK THE ECT SIGNAL CIRCUIT FOR A SHORT TO GROUND

Key in OFF position.
PCM connector disconnected.

Measure the resistance between:

( + ) ECT Sensor Connector, Harness Side	( - )
ECT - Pin 2	Ground

Is the resistance greater than 10,000 ohms?

Yes	No
GO to K8 CHECK FOR CORRECT PCM OPERATION.	REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

K4 DIAGNOSTIC TROUBLE CODE (DTC) P0118

Possible causes:
- ECT signal circuit open or short to voltage
- signal return circuit open
- ECT sensor
- PCM
Simulate the opposite DTC.
Key in OFF position.

Connect a 5 amp fused jumper wire between the following:

Point A ECT Sensor Connector, Harness Side	Point B ECT Sensor Connector, Harness Side
ECT - Pin 2	SIGRTN - Pin 1

Key ON, engine OFF.
Carry out the KOEO on-demand self-test.

Is DTC P0117 present?

Yes	No
INSTALL a new ECT sensor. CLEAR the DTCs. REPEAT the self-test.	GO to K5.

K5 CHECK THE ECT SIGNAL CIRCUIT FOR AN OPEN

Key in OFF position.
PCM connector disconnected.

Measure the resistance between:

( + ) PCM Connector, Harness Side	( - ) ECT Sensor Connector, Harness Side
ECT - Pin E32	ECT - Pin 2

Is the resistance less then 5 ohms?

Yes	No
GO to K6.	REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

K6 CHECK THE ECT SIGNAL RETURN CIRCUIT FOR AN OPEN

Measure the resistance between:

( + ) PCM Connector, Harness Side	( - ) ECT Sensor Connector, Harness Side
SIGRTN - Pin E25	SIGRTN - Pin 1

Is the resistance less then 5 ohms?

Yes	No
GO to K7.	REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

K7 CHECK THE ECT SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Key ON, engine OFF.

Measure the voltage between:

( + ) ECT Sensor Connector, Harness Side	( - )
ECT - Pin 2	Ground

Is any voltage indicated?

Yes	No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.	GO to K8.

K8 CHECK FOR CORRECT PCM OPERATION

Disconnect all the PCM connectors.
Visually inspect for:
- pushed out pins
- corrosion
Connect all the PCM connectors and make sure they seat correctly.
Carry out the PCM self-test and verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.