Ski-Doo REV Series Shop Manual

Section052–TEC ENGINE MANAGEMENT
Subsection 03 (DIAGNOSTIC PROCEDURES)
DIAGNOSTIC PROCEDURES
GENERAL
Here is the basic order suggested to diagnose a suspected engine management or fuel injection related
problem:
– Check the chart in TROUBLESHOOTING section to have an overview of problems and suggested so-
lutions.
– Check if the engine management system (EMS) pilot lamp lights up. If so, use the VCK (Vehicle Com-
munication Kit) and look for fault codes to diagnose the trouble.
– Check all fuses, battery and capacitor (on so equipped models).
– Check fuel pressure.
– Check spark plugs condition.
– Check all connections of the wiring harness.
Refer to COMPONENT INSPECTION AND ADJUSTMENT section for procedures.
TROUBLESHOOTING
The following chart is provided to help in diagnosing the probable source of simple troubles.
Monitoring Beeper Coded Signals
CODED SIGNALS POSSIBLE CAUSE REMEDY
2 short beeps (when engine is started).
DESS/RER pilot lamp also blinks.
Confirms that proper tether cord cap is
installed.
Engine can rev above clutch engagement.
No problem detected. Good ride.
1 short beep every 1.5 seconds (when
engine is started). DESS/RER pilot lamp
also blinks. Engine cannot reach pulley
engagement speed. Vehicle cannot be
driven.
Bad DESS system connection.
Defective tether cord cap.
Dirt or snow in tether cord cap.
Defective DESS post.
Reinstall tether cord cap correctly over post.
Use another programmed tether cord cap.
Clean tether cord cap.
Replace DESS post.
1 long beep per second. Reverse is selected. Vehicle can be driven in reverse.
3 short beeps per second. DESS/RER pilot
lamp also blinks. Engine cannot reach pulley
engagement speed. Vehicle cannot be
driven.
Wrong tether cord cap is installed. Install proper tether cord cap.
Program key into ECM.
3 short beeps per second. Engine
overheating pilot lamp also blinks.
Engine is overheating. Stop engine immediately and allow to cool.
Check cooling system.
1 long beep (2 seconds) every 15 minutes. Low battery voltage. Check battery and charging system.
4 short beeps every 2 minutes. Oil pilot
lamp also lights up.
Low oil level on 2-TEC models. Check oil level and replenish as soon as
possible.
Many other codes use the engine pilot lamp and the buzzer to indicate a problem. Refer to B.U.D.S. for
possible causes and service actions.
mmr2004-Rev 203

Ski-Doo REV Series Specifications

General

Chassis	REV
Track Width	15 in
Fuel Capacity	10.6 gal
Seating Capacity	1
Reverse	Available on most models
Electric Start	Available on most models