What is EEC test?
What is EEC test?
and processing capability, and verifies that various sensors and actuators are connected and operating properly. Most automotive computer scanners have Ford EEC-IV adaptors. They usually have a digital type read out of codes and prompting messages to help you along.
What is a Ford breakout box?
Thexton`s 126 Ford EEC-IV Breakout Box allows testing of all engine input signals and all computer generated output signals on 1983 and up Ford EEC-IV Computers. Helps pinpoint cause of problems – computer, sensor, solenoid, switch, actuator or wiring harness.
What is EEC power?
EEC stands for. Electronic. Engine. Control. It is the relay that sends power to the PCM (computer).
What is Koeo voltage?
The KOEO voltage should measure between 0 and 1.5V. If the reading is 1.5 to 5.5V, check the alternator ground and have the alternator bench-tested. If the reading is greater than 5.5V, check for a short to power. The KOER voltage reading should measure between 3.5 and 5.5V.
Where are the self test connectors on an EEC IV?
See figure below. EEC IV vehicles have two connectors for self testing the system. They are located on the firewall or the left or right front fender. The large connector contains the self test output (STO) and ground (SIG RTN). The small pigtail is the self test input (STI).
Is there Hard fault code for EEC IV?
If for example there was a loose wire to a solenoid that only lost contact while driving but was making contact while testing the system there would be NO HARD FAULT CODE. The code would show up IN MEMORY. The same would happen for a sensor that only went out of range occasionally.
What to look for in an EEC self test?
Watch out for hot and/or moving parts. When working on a no-start vehicle, use a neon spark tester to check for spark and ground the coil wire to prevent accidental starting if spark should occur while testing. Watch out for high voltage secondary circuits. If you are not sure of the safety of any operation DO NOT DO IT. ASK SOMEONE!
When does the EEC-V go into Run mode?
Run Mode – When the engine speed enters the normal idle range, the EEC-V Switches to Run Mode. The Throttle position determines the sub mode or mode of operation. Run Mode – Closed Throttle Mode (Idle) – This mode is entered typically when the vehicle is idling, or decelerating.
See figure below. EEC IV vehicles have two connectors for self testing the system. They are located on the firewall or the left or right front fender. The large connector contains the self test output (STO) and ground (SIG RTN). The small pigtail is the self test input (STI).
How does an analog volt meter work on an EEC IV?
To use an analog volt meter you will need to connect to the positive battery terminal to the positive lead on your volt meter. You will then connect the negative lead of the volt meter to the EEC-IV test harness as shown. Finally you will jumper the Signal Test Input (STI) into the EEC-IV test harness.
If for example there was a loose wire to a solenoid that only lost contact while driving but was making contact while testing the system there would be NO HARD FAULT CODE. The code would show up IN MEMORY. The same would happen for a sensor that only went out of range occasionally.
What do the pulses Mean on the EEC-IV?
The EEC-IV emits pulses to represent these numeric codes; for example, two pulses, a short pause, then four more pulses would signal a code 24. The EEC-IV has two different test modes, the first mode is called Key On Engine Off, or KOEO. The second mode is called Key On Engine Running, or KOER, and each mode has a specific purpose.
