OTC Tools Code Scanner Manual Del Usuario página 17

(See page 14 for 1991 & older vehicles.)
1) Turn Ignition Key OFF.
• Wait 10 seconds before proceeding.
2) Turn off Electrical Loads.
• This includes radio, headlights,
blower fans, air conditioner, and the
like.
3) Disconnect the In-Line SPOUT or
SAW Connector. (Depends upon
ignition system: SPOUT= Spark
Output; SAW = Spark Advance
Word.)
• This disconnects the computer
advance timing signal from the
ignition system.
• The ignition system will now operate
at "base engine" timing.
• The connector is located close to the
ignition module.
• There are 3 different styles
illustrated, depending upon your
vehicle type.
WARNING: The next step involves
starting the engine. Observe safety
precautions.
• Always operate vehicle in a well
ventilated area. Do NOT inhale
exhaust gases – they are very
poisonous!
• Set the parking brake.
• Put shift lever in PARK (automatic
transmission) or NEUTRAL (manual
transmission).
• Block the drive wheels.
• Stay away from moving engine
parts.
4) Start the
Engine.
• Only use the
ignition key to
start engine –
do not use a
remote starter.
• If engine will not start, stalls or runs
rough, refer to vehicle service
manual for troubleshooting charts
related to the symptom.
5) Check Engine Timing.
• Base timing should be the same as
the VECI decal specification, give or
take 2°. Example: Specified timing is
10° BTDC. Measured timing should
be in the range of 8° to 12°BTDC.
— Distributor System: If base timing
not correct, adjust or repair as
necessary before proceeding.
Refer to ignition system section in
vehicle service manual for
instructions.
— Distributorless System: Base
timing is NOT adjustable. If timing
not correct, refer to ignition system
section in vehicle service manual for
possible causes. Repair as
necessary before proceeding.
6) Reconnect the In-Line SPOUT or
SAW Connector.
7) Check for Timing Advance (or RPM
Increase).
• Timing change (or RPM increase)
should occur as soon as connector
is reconnected.
• If O.K. proceed to SELF-TEST
PART 4.
• If not O.K. proceed to SELF-TEST
PART 4, but repair Engine Run
codes 213 or 218 immediately, if
received.
8) Turn Ignition Key to OFF Position.
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