User Manual

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• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Ford Historic Diagnostics
5
If vehicle problems exist, codes are set.
Use
83'2:1 arrow keys to view codes.
Write down codes for reference.
✓ Continuous Memory Codes (codes set previously under normal driving
conditions) are available after reading KOEO Codes. They are indicated as
Memory Codes by the scan tool and are transmitted after KOEO Codes.
After viewing and noting the KOEO codes,
use the
'2:1 arrow key to view
Continuous Memory codes.
When done, press
%$&. to return to the
Ford Function List.
READ KOER CODES
The Read KOER Codes function activates the KOER (Key-On-Engine-Running)
self-test which retrieves KOER DTCs that are present when the engine is
running.When the trouble condition is inactive, the KOER Code will no longer be
sent through the data stream. This function also performs a Computed Timing
Check for EEC-IV vehicles manufactured from 1984 through 1991.
The DTCs are transmitted in two formats which transmit the same information:
• Slow Codes are regular service codes that allow the user to identify the faults
with an analog voltmeter or the check engine light. Slow codes are transmitted
within 3 minutes.
• Fast Codes are transmitted within seconds and must be read with a
diagnostic tool. MECS vehicles do not support Fast Codes.
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.
Select Read KOEO Codes from the Ford
Function List and press
(17(5 .
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