Ford onboard dashboard diagnostics

Ford onboard diagnostics dashboard test mode

Enter the Ford HEC Dealer Test Mode

1. With the truck off, press and hold the SELECT/RESET button on the instrument cluster.
2. Turn the ignition switch to the on position while the button is pressed
3. Continue pressing, "test" will appear on the odometer.
4. Start the truck (keep the dash button down)
5. Released the button to remain in the dash test mode.
6. Pressing the SELECT/RESET button now will advance through the parameters.

Display Descriptions

Here's the odometer function followed by a description.  Not every display listed may be on your truck.  05-07 added values that 03 / 04 didn’t have

GAGE= Sweep of all gauges (then present current gauge values).  Also carries out the checksum tests on ROM and EE. If the gauge sweep is inoperative, INSTALL a new instrument cluster.

BLUB= Illuminates all micro-controlled indicators and LEDs. Install a new indicator or LED as necessary. 

R####= Returns to normal operation of all micro-controlled indicators and LEDs and displays hexadecimal value for ROM level. If alternating flashes for FAIL and ROM level are displayed, INSTALL a new instrument cluster. 

EE= Displays the hexadecimal value for EE level . If alternating flashes of FAIL and EE level are displayed replace instrument cluster. 

DT= Displays hexadecimal coding of final manufacturing test date .

DTC = Displays continuous DTC's in hexadecimal format. Pressing the SELECT/RESET button will display any DTCs stored before proceeding to the next step. See index below for description of trouble codes. 

###C  Gas engines display last temperature gauge input value from SCP, temperature gauge will indicate present temperature. Diesel engine displays present temperature analog/digital input in decimal as a ratio, temperature gauge will indicate present temperature.

  

ENG= Displays the English speed in MPH. Speedometer will indicate present speed within tolerances. Display will show 0 if input in not received. If input is invalid for one second or more, or if speed is 0. 

M= Displays the metric speed data in kph. Speedometer will indicate present speed within tolerances. Display will show 0 if input in not received. If input is invalid for one second or more, or if speed is 0. 

TAC= Displays the tachometer data received from the PCM via the SCP network within tolerances. Tachometer will indicate present RPM. Display will show 0 if input is no received, if input received is invalid for one second or more, or if engine RPM is 0. 

BR

Displays the brake fluid level in an analog/digital ratio value.

  

FUEL= Displays the code (0-255) for the fuel sender input to the HEC. The fuel gauge will display a filtered fuel level value. This filter will keep the pointer from moving suddenly or erratically. 

255= open send +/- 0 

232= full stop +/- 0 

215= Full mark +/- 10 

178= 3/4 mark +/- 8 

138= 1/2 mark +/- 7 

93= 1/4 mark +/- 5 

41= E mark +/- 4 

54= Low Fuel (0-59) 

0-18= short (0-20 max) 

OIL= Displays the code (0-250) for the oil pressure switch input to the HEC.

Oil pressure gauge will indicate present oil pressure. Normal oil pressure (greater than 6psi) will display a value between 000 and 176. A low oil pressure or an inoperative engine oil pressure switch (less than 6 psi) will display a value greater than 176. 

dEG'C= Display of engine temperature in Degrees C input from cylinder head temperature sensor.  49 C= "C" mark 

60 C= Normal band start 

120 C= Normal band end 

-40 C= No SCP message for 5 seconds 

BAT battery voltage Displays the code (0-255) for the battery voltage input to the HEC. Battery voltage gauge will indicate present battery voltage.

bAt ##.#

Displays present battery analog/digital voltage.

Some trucks show it as a value between 0-255

93-102 6.2-9.1 volts low voltage  

115-124= 8.5-10.7 volts (Normal band start)

215-225= 15.8-18 volts, (Norm band end)

230-241= 16.9-19.1 volts, high voltage 

rhEo= Displays the present decimal rheostat dimming input, 0-255  

rhi, rhS, rho

Alternating 1 second display of pulse width modulation (PWM) input duty cycle, SCP hexadecimal dimming step, output driver counts in hexadecimal.

  

CR= Displays the current RUN/START sense input. Display will show -h for high input with the ignition switch in the START position and -L for low input with the ignition switch in the RUN position. 

PA, Pb, PC, and Pd

Displays 8-bit hexadecimal value for the Port A, B, C, and D readings (used when requesting information from the hotline).

PE0-PE7

Displays 8-bit hexadecimal value for the Port E0-Port E7 in analog/digital readings

GAGE= Repeats the display cycle