SECTION
4
BLUE
LINE THERMALWAVE
®
5M
45
Remove and disconnect the Oil
Pressure Switch and Wires. Install a
30 PSI Gauge. Start the Engine and
verify that the Engine builds oil
pressure. Does the Engine build oil
pressure?
Engine Runs for 5 Seconds
Note: Your Engine is equipped with a Zenith Fuel Injection System (Z.E.E.M.S.). Engine diagnosis is
the same as an Engine with a Carburetor.
Note: Make sure the Engine has oil and antifreeze; Waste Tank is empty, and that you have at least
a half tank of gasoline.
Turn off all Switches: Pump Switch, Trans. Pump
Switch, Waste Pump Switch, and Aux Switch.
Does the Engine start and run for about 5
seconds?
Disconnect the Waste Tank Float.
Does the Engine run for more
than 5 seconds?
Repair or replace
Waste Tank Float
See Engine Cranks but Doesn’t Start!
Install the Oil Pressure Switch.
Leave the wires disconnected.
Does the Engine run more than 5
seconds?
Yes No
Yes No
Yes No
Take Engine to an
Authorized Nissan Engine
Repair Center
Yes No
See Z.E.E.M.S.!
Replace Oil Pressure Switch!
