Acura NSX 1991 Manual page 798

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Engine Oil Pressure Gauge
Gauge Test
1. Before testing, check the No. 5 (1 5 A) fuse in the
under-dash fuse box.
2. Make sure the ignition switch is OFF, then discon-
nect the 2-P connector from the engine oil pressure
sending unit, and ground it with a jumper wire.
ENGINE OIL PRESSURE
GAUGE SENDING UNIT
3. Turn the ignition switch ON (II).
Check that the pointer of the engine oil pressure
gauge starts moving toward the "8" mark.
CAUTION: Turn the ignition switch OFF before the
pointer reaches the "8" mark on the gauge dial; if
you don't, you may cause damage to the gauge.
• If the pointer of the gauge does not move at all,
check for:
- An open in the YEL or BLU/WHT wire.
— Replace the engine oil pressure gauge if the
wiring is OK.
• If the engine oil pressure gauge is OK, go on to
step 4.
4. Check the engine oil pressure (see
• If the engine oil pressure is OK, replace the en-
gine oil pressure sending unit.
Table of Contents
BLU/WHT WIRE
section 8).
Engine Oil Pressure
Warning System
Engine Oil Pressure Switch Test
1. Raise the car, and place safety stands in the proper
locations (see section
2. Remove the right rear tire.
3. Remove the YEL/RED wire from the engine oil pres-
sure switch.
ENGINE OIL PRESSURE SWITCH
YEL/RED
WIRE
POSITIVE TERMINAL
4. Check continuity between the positive terminal and
engine (ground) with the engine off.
• If there is no continuity, the switch is OK.
• If there is continuity, do not replace the switch;
first check other possible causes in step 6.
6. Make sure engine oil level is OK, then check engine
oil pressure (see
• If engine oil pressure is OK, replace the engine oil
pressure switch.
• If oil pressure is low, remove, inspect, and, if
necessary, replace the oil pump (see
1).
CRANKSHAFT
PULLEY
OIL FILTER
section 8).
section 8).