Actron 9640 Star Test Mode EEC-IV, Mecs and MCU Vehicles, Sto, Test/Hold On Hold Enter To Test

Ford Historic Self-Test Routines

STAR Test Mode (EEC-IV, MECS and MCU Vehicles)

The STAR Test Mode can be used to retrieve DTCs from the PCM or other STAR (Self-Test Automatic Readout) compatible controllers installed in the vehicle. STAR Test Mode functions largely the same way and serves the same purpose as running KOEO and KOER tests. It is generally used as a last resort to check for DTCs in systems which may not be covered by KOEO and KOER testing (i.e. - Computer Ride Control suspension systems).

Select STAR Test Mode from the Ford Function List and press ENTER

Follow the instructions on the tool screen to access DTCs from the PCM. Pressing ENTER begins test.

Ford Function		List	?
` 9)STAR	Test	Mode	]
10)Code	Lookup		[
11)Print	Data		~

STAR Mode.

STO:

Test/Hold On: Hold

ENTER To Test.

The TEST/HOLD parameter indicates the state of the STI (Self-Test Input). The ENTER key toggles this state from TEST to HOLD.

STAR Mode

STO:LOW

Test/Hold On: Test

ENTER To Hold.

With the STI in the TEST state, the
self-test begins. The STO (Self-Test Output) parameter flashes either a HIGH
or LOW. A beep will accompany each LOW flash. Write down the 2– digit or 3	6
– digit code for reference.

✓ Disregard the blink which may occur when ignition key is turned ON. Depending on the vehicle being tested, determines if a three digit or two digit code used. If required, refer to the vehicle service manual for applicable code structure.

❒ A digit consists of consecutive LOW flashes or beep — count the number of LOWs for the digit

❒ A short HIGH (short pause) occurs between digits. ❒ A long HIGH (long pause) occurs between codes. ❒ There is no flash for the digit 0 (zero).

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