Troubleshooting - Tracker Off-Road XTR1000 Service Manual

Troubleshooting

Problem: Engine Does Not Start (No Spark at Spark Plugs)
Condition
1. Ground connections dirty — loose
2. Wiring harness shorting — disconnected
3. Spark plugs fouled — damaged
4. ECM faulty
5. Ignition timing sensor faulty
Problem: Engine Does Not Start (No Fuel at Cylinders)
Condition
1. Gas tank empty
2. Gasoline contaminated
3. Fuel pump faulty
4. Fuel hose broken — pinched
5. Gas-tank vent — hose obstructed
6. Pick-up valve(s) obstructed — damaged
7. Compression absent
8. ECM faulty
Problem: Engine Does Not Start (Fuel Does Not Ignite)
Condition
1. ECM Check Engine light failed
2. Spark absent
3. Compression low
4. Engine flooded
5. Gasoline contaminated
Problem: Engine Does Not Idle
Condition
1. ECM trouble code
2. Injector(s) faulty
3. Fuel pressure regulator faulty
4. Air filter obstructed
Problem: Engine Loses Power
Condition
1. Sensor faulty
2. Spark plug fouled
3. External coil faulty
4. Gas tank vent — hose obstructed
5. Compression low
6. ECM faulty
7. Fuel pressure regulator faulty
8. Check Engine light illuminated
9. Injector faulty
Remedy
1. Check all ground connections — clean and tight
2. Repair — replace — connect wiring harness
3. Clean — replace spark plugs
4. Replace ECM
5. Replace sensor
Remedy
1. Fill tank
2. Replace gasoline
3. Service — replace fuel pump — connections — wires
4. Replace — service hose
5. Remove obstruction — replace vent — hose
6. Remove obstruction — replace pick-up valve(s)
7. Repair — replace damaged — worn engine components
8. Replace ECM
Remedy
1. Check codes — repair as necessary
2. Check for spark — see No Spark at Spark Plugs sub-section
3. Service engine
4. Clear engine (hold throttle full-open)
5. Clean tank and entire fuel system
Remedy
1. Service — replace problem component
2. Replace injector(s)
3. Replace regulator — hose
4. Replace air filter
Remedy
1. Check engine light for trouble code — repair — replace
problem circuit or sensor
2. Replace spark plugs
3. Service — replace coil
4. Service — replace vent hose
5. Service engine
6. Replace ECM
7. Replace regulator
8. Check codes — repair as necessary
9. Replace injector
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