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Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - ENGINE TIMING CHECK
35
13. Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
and retesting after each repair is done to be sure the fault was
eliminated.
IMPORTANT: Before "Continuous Memory" codes can be
serviced, both the KOEO and the KOER Self-Tests must pass
(a PASS code 11 or 111 is obtained). After both of these tests
have passed, erase the vehicle's computer memory, take the
vehicle for a short drive, then repeat the KOEO Self-Test. If
any Continuous Memory faults are present, service them all
this time.
Do not proceed to the ignition timing check procedure or the
KOER test until a PASS code (code 11 or 111) for KOEO test
is obtained.
Engine Timing Check
Before performing the KOER Self-Test, the vehicle's Ignition Base
Timing and the computer's ability to electronically control timing
advance must be checked for proper operation.
This procedure is only applicable to 1992 and older
vehicles (excluding diesel engines). For 1993 and newer
vehicles, refer to the vehicle's service repair manual for
procedures to check and adjust timing.
For 1992 and older vehicles, the Scan Tool can be used in combination
with a timing light to check ignition timing and the vehicle computers
ability to advance ignition timing.
Check your vehicle thoroughly before performing any test.
ALWAYS observe safety precautions whenever working on a
vehicle.
A timing light is required to perform this test.
The vehicle must pass the KOEO Test (page 32) before performing
this test.
1. Locate the vehicle's Data Link Connector (DLC).
Some DLCs have a plastic cover that must be removed before
connecting the Scan Tool's cable connector.
2. Connect the Scan Tool (with the Ford Connector Cable Adaptor
attached) to the vehicle's DLC. Connect the Scan Tool to BOTH
connectors. Press POWER/LINK
to turn the Scan Tool ON,
then press ENTER
to continue.
The Ford Menu displays.
3. highlight Timing Check, then press ENTER
.
The Select Model Year screen displays.
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