5-17
5
1. Attach the Timing Light to the spark plug high ten-
sion lead; then remove the timing inspection plug
from the left-side crankcase cover.
2. Start the engine and using the RPM function on
the speedometer/tachometer, run at 1500 RPM;
ignition timing should be 10° BTDC.
3. Install the timing inspection plug.
If ignition timing cannot be verified, the rotor may be
damaged, the key may be sheared, the trigger coil
bracket may be bent or damaged, or the CDI unit/ECU
may be faulty.
ECU Error Codes
(550/700 cc)
If a sensor fails or an out-of-tolerance signal is sensed
by the ECU, an error code will be generated by the
ECU. This will result in the analog needle swinging
full scale. The EFI icon will flash.
To read the error code(s), use the following procedure.
1. Make sure the ignition switch is in the OFF posi-
tion; then remove the seats.
2. Locate the diagnostic plug next to the PDM; then
remove the black rubber cap.
3. Connect the Test Plug from Test Plug/Error Code
List to the diagnostic plug.
ATV-112
4. Turn the ignition switch to the ON position and
read the error code on the LCD. Refer to the fol-
lowing ECU Error Code List to identify the spe-
cific problem area.
ECU Error Code List
NOTE: Each of the following numerical codes will
have a two-letter prefix. A prefix of AC (Active
Code) or SC (Stored Code) will be displayed.
Always correct and clear Active Codes before
clearing Stored Codes.
• 00 = No Fault Detected (active code only)
• 12 = CKP (Crankshaft Position) Sensor*
• 13 = MAP (Manifold Absolute Pressure) Sensor
• 14 = TPS (Throttle Position Sensor)
• 15 = ECT (Engine Coolant Temperature) Sensor
• 16 = Speed Sensor
• 21 = IAT (Inlet Air Temperature) Sensor
• 23 = Tilt Sensor*
• 24 = Ignition Coil #1*
• 32 = Fuel Injector #1*
• 40 = ISC (Idle Speed Control) Valve
• 41 = Fuel Pump Relay*
• 60 = Cooling Fan Relay
• 95 = Sensor Power
• 96 = Incorrect ECU*
• 97 = ECU Memory Power (constant battery
power)
• 99 = Start/Run Not Possible (active code only)
*Will initiate code 99.
To clear the error code(s), use the following procedure.
NOTE: The ignition switch should be in the OFF
position.
1. With the test plug connected to the diagnostic plug
and the drive select switch in the 4WD position,
hold the reverse override switch down and turn the
ignition switch to the ON position.
2. After ten seconds, release the reverse override
switch and turn the ignition switch to the OFF
position; then turn the ignition switch to the ON
position. The display should read AC00 (no fault
detected).
NOTE: If the LCD still displays an error code,
continue troubleshooting the appropriate compo-
nent.
3. Disconnect the test plug; then install the black rub-
ber cap.
4. Install the seats making sure they lock securely in
place.
Tilt Sensor
(550/700 cc)
! WARNING
Incorrect installation of the tilt sensor could cause
sudden loss of engine power which could result in
loss of vehicle control resulting in injury or death.
! CAUTION
Do not drop the tilt sensor as shock can damage the
internal mechanism.
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