CanOBD2&1 Scan Tool - Sears

Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - KOER TEST
� The vehicle's computer is programmed
to advance ignition timing
20° (±3°) above the vehicle's "base
timing" value, and to freeze this
setting for two minutes from the time
the "Perform Timing Check within 2
minutes" message displays. This
allows the user to check the computer's
ability to advance ignition
timing.
� Within this two-minute period, follow instructions in the vehicle's
service repair manual to check the ignition timing with a timing
light and ensure that it is 20° above the specified base timing
value (±3°).
Example: If base timing specification is 10° BTDC, the acceptable
timing light reading should be in the range of 27° to 33° BTDC.
Base-timing specifications can be found on the Vehicle
Emission Control Information (VECI) decal. The decal is
located under the hood or near the radiator. If the VECI decal
is missing or damaged, refer to your vehicle's service repair
manual for specifications.
9. If timing light readings are within the acceptable range:
� Base timing and the vehicle computer's ability to advance timing
are working properly.
� Proceed to the KOER Self-Test below.
10. If timing light readings are not within the acceptable range:
� Base timing may be out of adjustment, or the computer may
have problems with the timing advance circuit.
� Refer to the vehicle's service repair manual for procedures on
adjusting and/or repairing ignition timing. Repairs to ignition
timing must be made before proceeding to the KOER Test.
Key on Engine Running (KOER) Self-Test
IMPORTANT: The KOEO Self-Test (page 79) must be
performed first, and a "pass code" (code 11 or 111) must be
obtained before performing the KOER Self-Test; otherwise,
results of the KOER Self-Test may be invalid.
Ignition timing and timing advance must be operating properly
in order for the KOER Self-Test results to be considered valid.
Perform an Engine Timing check (page 83) before performing
the KOER Self-Test.
Check your vehicle thoroughly before performing any test. See
BEFORE YOU BEGIN on page 18 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3 before
performing this test.
CanOBD2&1 85