Ford Historic (OBD I) Diagnostics

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

The STAR Test Mode can be used to retrieve DTCs from the PCM or other self-test automatic readout (STAR) 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).

From the On Demand Test Menu:

1.Select STAR Test Mode. •Use the UP or DOWN arrow keys until STAR Test Mode is highlighted. •Press ENTER.

2.Follow the instructions on the Scan Tool screen to access DTCs from the PCM.

•Pressing ENTER begins test.

The TEST/HOLD parameter indicates the state of the self-test

ENTER keyinput (STI). The

toggles this state from TEST to HOLD.

On Demand Test Menu

Wiggle Test

Output Sw Test

Cyl Balance Test

￿STAR Test Mode Review Data Print Data Tool Setup

Star Mode

STO:

Test/Hold On: Hold

ENTER to test.

Star Mode

STO: Low

Test/Hold On: Test

6

ENTER to hold.

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Actron CP9190 manual Star Test Mode EEC-IV, Mecs and MCU Vehicles, From the On Demand Test Menu