Check Low Oil Sensor System
Engine Does Not Start
1. Verify that engine oil level is within the cross hatch
pattern on the dipstick.
2. See Figure 17. If engine oil level is satisfactory,
disconnect one-place wire connector between oil sensor
module and oil sensor in crankcase (A).
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3. Obtain Digital Multimeter (Part No. 19602), and set to
read ohms (B).
4. Insert RED meter test lead into V Ω receptacle, and
BLACK meter test lead into COM receptacle (C).
5. Connect red meter test lead to oil sensor wire (D), and
black meter test lead to engine base (E).
6. Measure resistance. Replace sensor in crankcase if
continuity is obtained. Proceed to next step if meter
reads infinity.
7. See Figure 18. Connect one-place wire connector
between oil sensor module and oil sensor in crankcase
(F).
8. Disconnect one-place wire connector between oil sensor
module and armature coil (G).
9. Start engine. Verify that oil sensor module wire is not
touching ground.
10. Replace oil sensor module if engine starts. If engine
does not start, check oil sensor module wiring for shorts
to ground.
18
Check Breather Valve
Engine Does Not Start
1. See Figure 19. Gently blow air into breather hose (A)
to verify that there is no air flow through valve.
2. Apply vacuum or draw air out through breather hose to
verify that air flows freely through valve.
3. If air flow has no resistance when blowing or is restricted
under vacuum, the breather valve (B) is faulty. Replace
the valve cover (C).
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