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.

R1 PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODE (DTC) P2623

NOTE: This DTC does not set during crank mode.

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

Is DTC P2623 present?

Yes	No
GO to R2.	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 , if a driveability concern exists.

R2 CHECK THE IPR SOLENOID RESISTANCE

Key in OFF position.
IPR Solenoid connector disconnected.

Measure the resistance between:

( + ) IPR Solenoid Connector, Component Side	( - ) IPR Solenoid Connector, Component Side
VPWR - Pin 1	IPR - Pin 2

Is the resistance between 3 - 15 ohms?

Yes	No
GO to R3.	INSTALL a new IPR solenoid. CLEAR the DTCs. REPEAT the self-test.

R3 CHECK THE IPR SOLENOID VOLTAGE

Key ON, engine OFF.

Measure the voltage between:

( + ) IPR Solenoid Connector, Harness Side	( - )
VPWR - Pin 1	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to R4.	REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.

R4 CHECK THE IPR CONTROL CIRCUIT FOR A SHORT TO POWER

Key in OFF position.
PCM connector disconnected.
Key ON, engine OFF.

Measure the voltage between:

( + ) IPR Solenoid Connector, Harness Side	( - )
IPR - Pin 2	Ground

Is any voltage indicated?

Yes	No
REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.	GO to R5.

R5 CHECK THE IPR CONTROL CIRCUIT FOR A SHORT TO GROUND

Key in OFF position.

Measure the resistance between:

( + ) IPR Solenoid Connector, Harness Side	( - )
IPR - Pin 2	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to R6.	REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.

R6 CHECK THE IPR CONTROL CIRCUIT FOR AN OPEN

Measure the resistance between:

( + ) PCM Connector, Harness Side	( - ) IPR Solenoid Connector, Harness Side
IPR - Pin E2	IPR - Pin 2

Is the resistance less than 5 ohms?

Yes	No
GO to R7.	REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.

R7 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.