4/30/2021 0 Comments Ford Eec-Iv Schematic
If in doubt, run engine at 2000 rpm for 2 minutes. 2. Turn ignition off and wait 10 seconds for system to shut off.
Ford Eec-Iv Schematic Code Formats AtThere are drawings of the code formats at the end of this section.FAST CODES Fast codes contain the fault information output in the normal slow codes but are output about 100 times faster.
These are the first things output on a Key On Engine Off test. HARD FAULTS Hard faults are problems that the computer has located RIGHT NOW. Examples are a sensor out of range or a broken wire (open circuit). Hard faults are the FIRST set of slow codes output in a Key On Engine Off test. In a Key On Engine Running test, there are ONLY HARD FAULT codes. SEPARATOR PULSE The separator pulse is a single pulse that indicates the END of hard fault codes and the BEGINNING of memory codes. MEMORY CODES Memory codes are problems that the computer has noticed in the past. 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 same would happen for a sensor that only went out of range occasionally. NOTE: The computer will erase the memory after a certain number of engine re-starts if the problem does not repeat itself. Ford Eec-Iv Schematic Series Of PulsesENGINE ID The engine ID in a running test is a series of pulses equal to one half the number of engine cylinders. A 4 cylinder engine ID is 2 pulses, a 6 cylinder ID is 3 pulses and an 8 cylinder ID is 4 pulses. A diesel ID is 5. GOOSE CODE A GOOSE code (also called a dynamic response test) is output during an engine running test. This is a single pulse to signal you to quickly move the throttle approximately 12 way down and release. The following charts show the (approximate) timing of the various code pulses. It just takes a little practice to distinguish between two and three digit types. TESTS. 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). Ford Eec-Iv Schematic Manual Transmission HoldKEY ON ENGINE OFF (KOEO) TEST NOTE: On 4.9L trucks with a manual transmission hold the clutch pedal in during this test. On Diesel engine trucks hold the throttle to the floor during this test. Make sure engine is fully warmed. If in doubt, run engine at 2000 rpm for 2 minutes. Turn ignition off and wait 10 seconds for system to shut off.
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