Table 133
Troubleshooting Test Steps
Values Results
1. Engine Oil Level
A. Check the engine oil level.
Oil level Result: The engine oil level is low.
Repair: Fill the oil system to the full mark on the dipstick.
Result: The engine oil level is OK.
Proceed to Test Step 2.
2. Oil Specification
A. Check that engine oil of the correct specification is being
used. Refer to the Operation and Maintenance Manual, “Refill
Capacities and Recommendations”.
Oil specification Result: An incorrect specification of engine oil is being used.
Repair: Drain the oil system and refill the oil system with en-
gine oil of the correct specification. Refer to Operation and
Maintenance Manual, “Engine Oil and Filter - Change”.
Result: The engine contains oil of the correct specification.
Proceed to Test Step 3.
3. Aerated Oil
A. Sample the engine oil for aeration.
Note: Foamy oil on the dipstick is a good indication of
aeration.
Aeration Result: The oil is aerated.
Proceed to Test Step 9.
Result: The oil is not aerated.
Proceed to Test Step 4.
4. Engine Oil Pressure
A. Check the actual engine oil pressure with a calibrated test
gauge. Compare the oil pressure reading from the electronic
service tool to the pressure on the test gauge.
Oil pressure Result: The oil pressure reading from the electronic service
tool and the pressure on the test gauge are different.
Repair: Install a new oil pressure transmitter. Refer to Disas-
sembly and Assembly, “Engine Oil Pressure Sensor - Remove
and Install”.
Result: The oil pressure reading from the electronic service
tool and the pressure on the test gauge are similar.
Proceed to Test Step 5.
5. Engine Oil Filter
A. Remove the engine oil filter. Refer to the Operation and
Maintenance Manual, “Engine Oil and Filter - Change”.
B. Inspect the engine oil filter for evidence of blockage.
Oil filter Result: The oil filter is blocked.
Repair: Investigate the cause of the filter blockage.
Install a new oil filter. Refer to the Operation and Maintenance
Manual, “Engine Oil and Filter - Change” for further
information.
Result: The oil filter is OK.
Repair: Install a new oil filter. Refer to the Operation and
Maintenance Manual, “Engine Oil and Filter - Change” for fur-
ther information.
Proceed to Test Step 6.
(continued)
246 UENR4469-36
Symptom Troubleshooting
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