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Quoting from the Rex/Regina (same for LH 2.0/EZK) fault tracing manual:
"In the partial load range, a load signal test is carried out twice per engine revolution. If the load signal is consistently high or low, fault code 1-4-4 is set." (Signal is from The FI Control Module to the Ignition CM.)
"Possible Fault Causes"
• Open-circuit or short-circuit to ground between the Fuel Injection CM pin #25) to the Ignition CM pin #8.
• Defective FI Control Module.
• Open-circuit in power supply to FI Control Module #9.
That last one is singled out in a 1997 Service Bulletin on the 1-4-4 code, which says:
"Poor soldering on FI System Relay* output 87/1 can cause an intermittent open-circuit in the main power supply to pin 9 at the LH 2.4 FI Control Module, which would lead to the FI module's failure to send the "load signal" from its pin #25 to pin #8 at the EZK Ignition Control Module — resulting in the 1-4-4 EZK code."
* This is the other relay found in the white case with the Fuel Pump relay. Collectively they become the "Fuel Injection Relay."
NOTE: The RSRelay is not the same as the "Relay, fuel injection (MFI)" as it's identified in the Regina Wiring Diagrams (item 2-13).
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Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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