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Discussion Starter #1
I have a 2001 Focus wagon. The thermostat was replaced about 1,500 miles ago because the temp guage was indicating about one-fourth up from the cold position. After replacing the Thermostat the indicator went up to mid-scale or the 12:00 O'clock position

I just found out on this web site that the temp guage indicates cylinder head temperature - not coolant temperature!

I squeezed the upper radiator hose while the engine was running and it seemed as if it was empty. As I squeezed the upper hose, I saw some air bubbles in the overflow container -

Does anyone have any suggestions? It is pretty cold in Buffalo NY - I even put cardboard in front of the radiator - and that didn't help!

I thought the temp guage was reading coolant temperature !!!!
 

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C2H5OH
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CHT and ECT are very closely related. Enough so that you need not concern yourself with the fact it's not ECT.


Coolant level, coolant mixture, air in the system, bad overflow cap and all possible suspects to low heat.
 

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1.)top off coolant
2.)check for leaks and inspect coolant cap
3.)change your T-stat + gasket
4.) may be bad temp sensor but change T-stat first
 

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Discussion Starter #4
Thanks for the suggestions - I went to Auto Zone to have the overflow cap tested - Autozone can not test cap so I bought a new cap - Now the heater output has increased in temperature and the upper radiator hose is now hard and solid

Thanks everyone for the suggestions..... Now If I could figure out how to do that test with the trip mileage stick - I could read the temperature....
 

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here you go

Self-Diagnostic Mode - Instrument Cluster

1. To enter the instrument cluster self-diagnostic mode simultaneously depress and hold the tripmeter reset button then turn the ignition switch to position II or III.
2. Release the tripmeter reset button when TEST is displayed on the LCD. This will take between 5 and 8 seconds.
3. The instrument cluster will enter the gauge sweep test.
4. To navigate to the following tests while in self-diagnostic mode depress the RESET button to move to the next test.
5. The self-test is deactivated when the ignition is turned to the OFF position.

#.Test
#.Syntax Displayed
#.Gauge/Indicator/Display Tested
#.Description

#.1..Gauge sweep.
#.GAGE.
#.Tachometer, speedometer, temperature and fuel.
#.All gauges go through a full up and down pointer sweep smoothness check, which takes approximately 5 seconds.

#.2..Fill in all LCD.
#.8888.
#.LCD display built into Speedometer.
#.Fills in LCD display therefore seeing if display functioning correctly.

#.3..Indicator bulbs.
#.BULB.
#.Instrument cluster illuminates indicator and warning indicators.
#.Illuminates all the warning indicators that are controlled by the instrument cluster.

#.4..ROM level.
#.rXXX.
#.Instrument cluster read only memory (ROM).
#.Displays the instrument cluster ROM revision level.

#.5..NVM level.
#.EXXX.
#.Instrument cluster non volatile memory (NVM).
#.Displays the instrument cluster NVM revision.

#.6..DTC.
#.XXXX or NONE.
#.Diagnostic trouble codes (DTCs).
#.To list the DTCs stored, press the RESET button.
..REFER to the instrument cluster diagnostic trouble code (DTC) index below.
..The DTC codes will scroll through if there is more than one.

#.7..Road speed mph.
#.XXX.X.
#.Speedometer.
#.Displays the speed signal input in mph.

#.8..Road speed Km/h.
#.XXX.X.
#.Speedometer.
#Displays the speed signal input in Km/h.

#.9..Engine speed.
#.XXXX.
#.Tachometer.
#.Displays the tachometer input signal (RPM).

#.10..Fuel volume.
#.FXXX.
#.Fuel sender system.
#.Displays the fuel volume signal input.

#.11..Coolant Temp.
#.XXXC
#.Engine coolant temperature.
#.Displays the engine coolant temperature signal input.

#.12..Battery Voltage.
#.bXXX.
#.Battery Voltage (t).
#.Displays battery voltage input.

#.13..ABS fail.
#.Ab-[H/L].
#.ABS system.
#.Displays ABS raw cluster input. (H = open-circuit, L = ground).

#.14..Electronic Brake Distribution Failure (EBD).
#.Eb-[H/L].
#.EBD system.
#.Displays EBD raw cluster input. (H = open-circuit, L = ground).

#.15..Illumination.
#.IL-[H/L].
#.Cluster and instrument panel illumination.
#.Displays instrument cluster and instrument panel illumination. (H = ON, L = OFF).

#.16..Crank Sense.
#.Cr-[H/L].
#.Cluster and instrument panel crank sense.
#.Displays Cluster and instrument panel Crank sense. (H = Ignition, L = Ground or over-charging).
#.(Crank sense it the Pos I (Accessory) supply to the cluster. If this is missing then the cluster will remain dead for about 20 seconds after key on. Then it will function normally. This can happen when someone fits a radio and blows the accessory fuse).

Note:
Additional tests are available after number #.16 but are not useful for diagnostics.

Note:
Later vehicles had a "cost reduced" cluster that had a different Engineering Test Mode layout. These came in about 03-53 reg, and can be distinguished by only the symbol lighting up in the tell tale rather than the whole lot. (LEDs rather than bulbs).
These clusters used stepper motors for the gauges rather than the air cored ones and did not have a Gauge Sweep test?

Self ..........DTC.......... Description
Diagnostic
Mode
Displayed
DTC

9202 ..........B1202.......... Fuel pump module circuit open
9204 ..........B1204.......... Fuel pump module short to ground
9342 ..........B1342.......... Instrument Cluster ECU is defective
9317 ..........B1317.......... Battery voltage high (greater than 16V)
9318 ..........B1318.......... Battery voltage low (less than 10V)
9359 ..........B1359.......... Ignition Run/ACC circuit failure
A143 ..........B2143.......... NVM memory failure
A477 ..........B2477.......... Module configuration failure
D041 ..........U1041.......... Invalid data for vehicle speed
D027 ..........U1027.......... Invalid data for engine RPM
D073 ..........U1073.......... Invalid data for engine coolant
D262 ..........U1262.......... Missing speed, tacho, engine temp, or dometer count
D123 ..........U1123.......... Invalid data for odometer
 

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Discussion Starter #6
QUEESY - Amazing - Thanks for this valuable information

Do I start the engine after I get into the diagnostic mode ?

How do I read RPM's and COOLANT TEMPERATURE etc if the engine isn't running?

Or, is their some values stored somewhere that show up as I go through the test ?

When I was a teen - the local auto mechanic used to do the diagnostic stuff 'by ear'

He'd set the 2 barrell mixture and idle speed with his trusty screwdriver as he listened

to my engine - and I thought he was GOOD !
 

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Do I start the engine after I get into the diagnostic mode ?
Yes, start the engine. It will stay in test mode until you turn the engine/key to off.

@Qweesy
Excellent info; I will save it, bookmark it, use it for future posts. Thanks!!
 

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I'm prob. one of the WORST for computer tricks, but assuming you're on a Windows machine I'll tell you what works to do that on mine.

You can "point" the arrow moved by the mouse/touchpad to the number 5 for post number at the right end of the blue bar above that post by Qweezy.

Then RIGHT "click".

That will give you a menu box, pick "bookmark this link" by point & click on it. (left click).

You'll then see a bookmark box displayed, that will let you type in your own name for the link so you can find it easily in your list of "bookmarks".

(I just tested it for a reminder, used "self diagnostic mode - Focus" for a title)

Then click the box at the bottom of that "bookmark box" to confirm your choice (marked "save") and it's done.
 

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Discussion Starter #12
Sailor is a genius !

i HOPE you get this message as your directions worked perfectly - that information is now in my Favorites box deep inside my computer. Next time I see you I'm buying the coffee and donuts. Q
 

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Glad it Worked for you, looks like you're finding your way around here better now.

I'll take you up on the Coffee, we'll find a time to hook up one of these days.
 
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