Uploaded February 2017 | Updated September 2026, 2 weeks ago

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Some Fords - featured is a Mondeo Mk3 - have an instrument cluster self-diagnostics mode, which can give you some basic data readout without the use of an OBD scan tool.

This is the basic list of data (your car may vary):
* Gauge sweep test
* LCD display test
* Cluster bulbs test
* ROM level
* NVM EEPROM level (not an error code)
* DTC revision
* DTC error codes: Will show "none" unless there are codes stored, in which case it will iterate through them. Only cluster codes are shown here, this is not a substitute for a proper ODB2 scan tool to pull general DTC codes.
* Vehicle speed mph
* Vehicle speed km/h
* Averaged speed encoded
* Tachometer (engine RPM)
* Averaged RPM encoded
* Odometer counter
* Fuel level (010 empty to 254 full)
* Averaged fuel level
* Fuel flow rate
* Cylinder head temperature (in degrees C)
* Battery voltage (or more accurately, voltage at the cluster).

Related video: removing the instrument cluster (change light bulbs etc): youtu.be/5Qe1b1W04-o