Ford Historic Self-Test Routines

Output Switch Test (EEC-IV Vehicles)

The Output Sw (Switch) Test, also known as the Output State Check, is used to check the operation of the computer-controlled relays and solenoids on EEC-IV vehicles. The user can troubleshoot circuits using a voltmeter to measure voltage at the relays and solenoids in both energized and non-energized conditions. All measurements should be recorded for reference.

Fuel injectors are NOT energized during this test.

On vehicles equipped with Integrated Vehicle Speed Control (IVSC), failure to disconnect the vacuum supply hose from the Speed Control Servo energizes the Speed Control Solenoids.

6

Select Output Sw Test from the Ford

Ford Function

List

?

Function List and press ENTER.

 

5)Wiggle

test

 

]

Observe the screens and follow the

` 6)Output

Sw

Test

[

7)DCL Data

 

~

instructions.

 

 

 

 

1)Set Parking Brake.

2)Put Transmission In Park Or Neutral.

3)Turn A/C Off.

4)Start Engine — Let Idle Until Hot.

5)Turn Ign Key Off.

6)Wait 10 Seconds. Turn Key On-Engine Off. Do not Start Engine.

Avoid Cooling Fan! It May Turn On During Test.

! CAUTION

The test screen indicates the time

Procedure Runs Less

remaining. Do not touch vehicle or tools

during this time until the next screen

Than 3 Minutes.

appears.

 

Depress the accelerator pedal fully to turn ON relays and solenoids. Do the same to turn them OFF. This can be repeated as many times as required to locate the fault.

Time Remaining=1:56

Relays & Solenoids ? Are *Off*. Depress &] Release Throttle [ Fully To turn On. ~

Turn the ignition key Off and press FUNC to return to the Ford Function List.

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Actron 9640 user manual Output Switch Test EEC-IV Vehicles, 5Wiggle Test, ` 6Output Test 7DCL Data, Than 3 Minutes

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