EEC four test codes

Tiny
AHRLO
  • MEMBER
  • 1993 FORD F-350
  • 7.5L
  • V8
  • 2WD
  • MANUAL
  • 92,000 MILES
When using your article "how to gather ford codes OBD1", (check engine light doesn't work). So used test light it doesn't flash (it stay on). Is there something I'm missing with these instructions?
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Tuesday, August 20th, 2019 AT 2:38 PM

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Tiny
ASEMASTER6371
  • EXPERT
Good evening,

Below are the instruction for the key on, engine off code reading.

Roy

NOTE: It may be necessary to service non-EEC-IV faults before running the quick test.

Continuous codes recorded in this step will be used for diagnosis in ADDRESSING CONTINUOUS MEMORY DTC after a pass code is received in both Key On Engine Off (KOEO) and Key On Engine Running (KOER) self-tests.
Deviation from this procedure may cause false codes to be output.

1. START engine and bring to normal operating temperature.
NOTE: If engine will not start or stalls after starting, proceed with the Key On Engine Off (KOEO) self test.
2. Turn the key OFF, then wait ten seconds.

Jumper Wire Installed Between Pin #2 And Self Test Input (STI)
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3. ACTIVATE the self test by grounding the STI connector.
4. Turn the ignition key to the ON position.
5. Record all codes received.
6. Turn the ignition key OFF and DEACTIVATE the self test.
7. If a pass code (11 or 111) is received for hard codes (11/111-10-any code), proceed with next step. See: Computers and Control Systems > Reading and Clearing Diagnostic Trouble Codes > Key ON Engine Running (KOER) Self-Test
8. If any hard codes are received, refer to the appropriate diagnostic trouble code chart for diagnostic path. See: A L L Diagnostic Trouble Codes ( DTC ) > Manufacturer Code Charts > Trouble Code to Pinpoint Test Charts
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Tuesday, August 20th, 2019 AT 3:26 PM
Tiny
AHRLO
  • MEMBER
The truck is not running. So used the KOEO method using a test light, but when connected light just stays on, no flash. Also, try using an OBD1 scanner, but no codes (just 000)?
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Tuesday, August 20th, 2019 AT 4:20 PM
Tiny
ASEMASTER6371
  • EXPERT
The method I sent you flashes it out with the check engine light.

Roy
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Tuesday, August 20th, 2019 AT 4:35 PM
Tiny
AHRLO
  • MEMBER
Check engine light does not work. Fuse seems to work maybe bulb or other.
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Tuesday, August 20th, 2019 AT 4:38 PM
Tiny
ASEMASTER6371
  • EXPERT
Most likely you have a failed ECM. I would replace the ECM.

If the light does not work and you cannot get codes, that is a dead ECM.

Roy
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Tuesday, August 20th, 2019 AT 4:43 PM

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