Ford Historic (OBD I) Diagnostics
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6
Exhaust gases are harmful or lethal. Always
operate vehicle in a well-ventilated area.
The KOER test is done with the engine running. Do
not over-rev engine. Observe all safety precautions.
Avoid cooling fan! It may turn on during test.
From the Diagnostic Codes Menu:
1. Select Read KOER Codes
• Use
UP
or
DOWN
arrow
key until Read KOER Codes is
highlighted.
•Press
ENTER
.
2. Select Fast Codes, Slow
Codes or Computed Timing.
• Use
UP
or
DOWN
arrow
key until desired chioce is
highlighted.
•Press
ENTER
.
✓Follow the instructions
step-by-step. Failure to perform
these steps may set a false DTC in
the PCM — observe the display.
1) Set parking brake.
2) Transmission in park (P) or neutral (N).
3) Turn A/C off.
4) Start engine and let idle until hot.
5) Turn ignition key off.
6) Wait 10 seconds. Start engine and let idle.
7) If vehicle is equipped with a manual transmission, release clutch.
3. After performing steps.
•Press
ENTER
to activate the self-test.
!
WARNING
!
CAUTION
!
CAUTION
Read KOEO Codes
Read KOER Codes
Erase Codes
IVSC Speed Ctrl
Review Data
Print Data
Code Lookup
Diagnostic Codes Menu
Read KOER Codes
Fast Codes
Slow Codes
Computed Timing
Select Code Type
Fast Codes