3-30. ENGINE TROUBLESHOOTING (CONT)
TEST OR INSPECTION
8. LOW ENGINE OIL PRESSURE (Cont).
S t e p 4 . ( C o n t ).
Press and hold TEST until CAL appears on display then release TEST.
Wait for offset value to appear on display. Offset value should be
between -150 to +150. If it is not, STE/ICE is defective (refer to
Press and release TEST.
Start engine and warm to operating temperature.
Watch VTM display and idle engine.
Display should indicate 45 to 60 psi with engine at normal operating
Shut off engine.
a. If VTM display indicates 45 to 60 psi with engine at normal op-
erating temperature, replace engine oil pressure switch (page
b. If VTM display does not indicates 45 to 60 psi with engine at
normal operating temperature, disconnect test equipment, rein-
stall engine oil pressure switch (page 5-114), and notify next
higher maintenance level (engine oil pump must be removed and
r e p a i r e d ) .