Test Equipment

The following equipment is recommended to diagnose and test EEC-IV system. Some equipment is REQUIRED to perform tests. DO NOT attempt to test this system without proper equipment. Damage to vehicle components will result if improper equipment is used.

• The Self-Test Automatic Read-Out (STAR) Diagnostic Tester (Rotunda 007 00004) is recommended but not required. It is specially built for the EEC-IV system and is used to display the 2-digit (numeral) service codes that are programmed into the control module. There are also a number of aftermarket testers available.
• Analog Volt/Ohmmeter (VOM) with 0-20V DC range. This can be used as an alternate to diagnostic tester.
• Digital Volt/Ohmmeter (DVOM) with minimum 10-megohm input impedance.
• Breakout Box (Rotunda 014-00322). This is a jumper wire assembly which connects between the vehicle harness and the ECA. The breakout box is REQUIRED to perform certain tests on the system. Ford Motor Co. specifically states that using the probe from a DVOM will cause PERMANENT DAMAGE to the ECA 60 pin connector. The "Test Pin No." called out in CIRCUIT TESTS refers to Test Pin numbers on breakout box. Once the breakout box has been installed during a test sequence, it may remain connected for the remainder of that test unless otherwise specified.
• Vacuum gauge with 0-30 in. Hg range and resolution (units on scale) of 1 in. Hg.
• Tachometer with 0-6000 RPM range, accuracy +/- 40 RPM and a resolution of 20 RPM.
• Vacuum pump with 0-30 in. Hg range.
• Timing light.
• Spark tester. A modified side electrode spark plug with the electrode removed and an alligator clip attached may be used.
• Fuel Injection Pressure Gauge (T80L-9974-A).
• 12-volt test light (non-powered type).
• Jumper wire, about 15" long.
• MAP Tester. This unit plugs into MAP/BP sensor circuit and DVOM to check input and output signals. The MAP sensor produces a frequency signal which may be checked using a scope with a millivolt scale.