Just curious: does anyone have a list of what all is located within that test funtion along with the digital speedo and digital tach? Just learned about that trick today and was surprised...

 

please share that trick, im trying to learn as much as posible about these trucks. unfortunatly im not very "up to date" with alot of this stuff!

 

Well, real quick, I learned today that if you hold the trip button down prior to starting the truck, it appears to run a test mode like sweeping the guages and as you push the trip button it will change into different codes:

digital speedo read
digital tach read
fuel pressure
brake something or other
temp
volts
etc...

Just trying to see what all of the other "CODES" mean...

 

hey thanks for the info. ill have to check it out. thanks again

 

how do you get it back to normal?

 

I just restarted the truck...I'm sure that there is another way by running through all of the options and bring it back to beginning. (I think)

 

If you keep pressing the button, it will just keep cycling through. Maybe holding the button? The only way I have found to get out of it is by keying off and on again.

 

Thats cool, how can i do this on my lariat

 

never mind i figured it out. On the lariats you have to hold in Setup and Reset, then turn key and then when it says test then push Reset again and it says sweep gauges, then you can go through your options by pushing Reset.

 

it is a neat trick, but useless when driving, your eyes focus to much on that little box and not on the road, I also think you can get a read out on how manny Liters are in the tank ( Canada ) and you can get the temp off your brake fluid. thiers a lot off info thier.

 

Is this only on the 04+ models?
-Patrick

 

yes...not sure if it works on the XL but works on the XLT ( should work on the XL )

 

Activating Test Mode

To enter the HEC Dealer test mode, depress and hold the instrument cluster SELECT/RESET button, turn the ignition switch to the RUN position, and then continue pressing the SELECT/RESET button (5 seconds) until tESt is displayed in the odometer. The SELECT/RESET button must be released within 3 seconds of the odometer tESt display to begin the dealer test mode.

Depress the SELECT/RESET button to advance through the following steps until dtc is displayed. Depressing the SELECT/RESET button will display any stored continuous DTCs before proceeding to the next step.

Odometer Display Description

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

All segments illuminated Illuminates all odometer segments. If any odometer segment is inoperative INSTALL a new instrument cluster.

bulb 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. (used when requesting assistance from the hotline). If alternating flashes for FAIL and ROM level are displayed, INSTALL a new instrument cluster.

EE Displays the hexadecimal value for EE level (used when requesting assistance from hotline). If alternating flashes of FAIL and EE level are displayed replace instrument cluster.

dt Displays hexadecimal coding of final manufacturing test date (used when requesting assistance from hotline).

dtc Displays continuous DTC's in hexadecimal format. Pressing the SELECT/RESET button will display any DTCs stored before proceeding to the next step.

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.

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.

dEGC 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

bAtt Displays the code (0-255) for the battery voltage input to the HEC. Battery voltage gauge will indicate present battery voltage. 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 (used when requesting assistance from the hotline)

rhi
rhS
rho Not used.

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-PE7 not used.

GAGE Repeats the display cycle

Source: Helms manual

 

thanks for all the input! i did the test yestersday when i got home from work....thought i might have messed something up by pushing thru all the options. didn't know what half of them meant till now! thanks

 

Could any of these output messages be the one that tells you your computer code? That would be really helpful if your truck was re-flashed and the dealer never put a sticker on it.

Duke