Test Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 Ford RV Cutaway, 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

AP1 PRELIMINARY DIAGNOSIS FOR CODE (DTC) P2289

Retrieve and record all DTCs.
Record the freeze frame data.
Clear the DTCs.
Carry out the KOEO and continuous on-demand self-tests.

Is DTC P2289 present?

Yes	No
GO to AP2.	UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists.

AP2 DIAGNOSTIC TROUBLE CODE (DTC) P2289

Possible causes:
- biased ICP sensor
- open SIGRTN circuit
- signal circuit shorted to voltage
- PCM
Key OFF.
Disconnect the ICP sensor.
Disconnect the PCM.
Measure the resistance between the ICP sensor SIGRTN circuit pin A, harness side and the PCM engine connector pin 25, harness side.

Is resistance less than 5 ohms?

Yes	No
GO to AP3.	REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

AP3 CHECK THE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Key ON, engine OFF.
Measure the voltage between the ICP sensor signal circuit pin C, harness side and ground.

Is any voltage indicated?

Yes	No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.	GO to AP4.

AP4 CHECK THE ICP SENSOR

Key OFF.
Connect the ICP sensor.
Connect the PCM.
Key ON, engine OFF.
Access the ICP PID.

Is the ICP PID voltage between 0.15 and 0.35 volts?

Yes	No
INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test.	INSTALL a new ICP sensor. CLEAR the DTCs. REPEAT the self-test.