Troubleshooting

(Table 12, contd)
Troubleshooting Test Steps
Values Results
3. Breather Heater
A. Turn the keyswitch to the OFF position.
B. Disconnect the breather heater connector.
C. Turn the keyswitch to the ON position.
D. Use a suitable multimeter to measure the voltage at the harness
connector for the heater.
E. Turn the keyswitch to the OFF position.
F. Use a suitable multimeter to measure the resistance of the heat-
er element.
10 V to 14 V for
step D
Less than 10 k
Ohms for step
F.
Result: The measured voltage is less than 10 V.
There is a fault in the wiring to the breather heater.
Repair: Repair the harness or repair the harness
Result: The measured resistance is greater than 10 k
Ohms.
Repair: Replace the breather heater.
Result: All measurements are within the expected
ranges.
Proceed to Test Step 4.
4. Excessive Blow-by
Excessive blow-by increases the flow of fumes through the breath-
er system and can cause the breather element to block. The pres-
sure relief valve may then open.
A. If excessive blow-by is suspected, replace the breather ele-
ment. Refer to the Operation and Maintenance Manual, “Engine
Crankcase Breather Element - Replace”.
B. Investigate the cause of the excessive blow-by. Refer to Trou-
bleshooting, “Oil Consumption Is Excessive”.
Blow-by Result: The fault has been rectified.
Return the engine to service.
Result: The fault is still present.
Contact the Dealer Solution Network (DSN).
i06221272
Cylinder Is Noisy
Probable Causes
• Diagnostic codes
• Fuel quality
• Valve train components
• Injectors
• Pistons
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
UENR0612-07 45
Symptom Troubleshooting
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