Toyota Pick-ups, Land Cruiser, and 4 Runner 1997-00

Oil Pressure Light/Gauge Sender

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OPERATION



The oil pressure sender/switch controls the gauge in the instrument cluster of your vehicle while the engine is ON . The gauge will fluctuate during engine operation. If the pressure should stay below the normal range, you should pull to the side of the road and turn your engine OFF immediately. Check your oil level of the vehicle on level ground, if it is low, fill to the proper level. Start the engine and recheck after a few minutes. Oil pressure may not build up when the level is too low.



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Fig. A common oil pressure gauge found on Toyota trucks

REMOVAL & INSTALLATION



When troubleshooting a suspected oil pressure problem, it is possible to remove the electric oil pressure gauge sending unit (switch) and install a length of appropriate size oil line and a mechanical gauge. This is often the best way to determine if the instrument panel oil pressure gauge is faulty, the electric gauge sending has failed, or if the engine oil pump really is putting out only low pressure, endangering the engine.

  1. If equipped, remove the lower engine splash shield.
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  3. Due to the shape of the switch body it may be necessary to use a specially shaped socket. Toyota recommends their Special Service Tool (SST) 09816-33010 or an equivalent oil pressure switch socket. Using an appropriate socket extension, as required, remove the switch.
  4.  



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Fig. A special socket is used to remove the switch



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Fig. Apply a thin coat of adhesive such as Loctite or an equivalent to the switch prior to installation



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Fig. A mechanical gauge temporarily substituted for the oil pressure switch can help identify the cause of a low oil pressure indication

To install:

  1. Apply a thin coat of Loctite or equivalent to the switch. By hand, carefully thread the switch into the engine. If resistance is felt at all, remove the switch and inspect the threads for any damage. Continue to install the switch. Once installed tighten to 11 ft. lbs. (15 Nm).
  2.  
  3. If removed, install the engine splash shield.
  4.  
  5. Start the engine and inspect for leaks.
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