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6 – 22 TROUBLESHOOTING
1509 OIL PRESSURE DOES NOT RISE Checkpoint Trouble Cause Countermeasure
Engine oil Improper viscosity engine oil Insufficient engine oil Replace the engine oil Correct the engine oil volume Defective oil pressure gauge or unit Defective indicator light Repair or replace the oil pressure gauge or unit Replace the indicator light Oil pressure gauge or unit Clogged oil filter element Replace the oil filter element or the oil filter cartridge Oil filter Relief valve sticking and/or weak bypass valve spring Replace the relief valve and/or the bypass valve spring Relief valve and bypass valve Clogged oil pump strainer Clean the oil pump strainer Worn oil pump related parts Replace the oil pump related parts Rocker arm shaft Worn rocker arm bushing Replace the rocker arm bushing OK OK OK OK NG NG NG NG NG NG NG Continued on the next page Oil pump OK |