Spectrum 3.0L GM, Parts & Service Manual

Page: 103 / 327

103
DTC 100 Oil Pressure Low/High/High at Stall
Step Action Value(s) Yes No
1
Did you perform the On-Board (OBD) System
Check?
-
Go to Step
(2)
Go to OBD
System.
Check Sec-
tion
2
Verify that the engine has oil pressure using a
mechanical oil pressure gauge before proceed-
ing with this chart. Oil pressure must remain
above 6 psi.
Does the engine have oil pressure above 6 psi?
6 PSI
Go to Step
(3)
Repair faulty
Oiling System
3

Ignition ON, Engine Running DST connected
in system Data Mode

Clear DTC 100

Warm the engine by idling until the ECT
temperature is above 160 degrees F. and
has been running for at least one minute

Increase engine speed above 500 RPM
Does DTC 100 reset?
Go to Step
(4)
Intermittent
problem. Go
to Intermittent
section
4

Clear DTC 100

Key OFF

Disconnect oil pressure switch connector
C012 and isolate the connector from engine
ground.

Start and run the engine
Does DTC 100 reset?
Go to Step
(6)
Go to Step
(5)
5
Replace oil pressure switch
Is the replacement complete?
Go to Step
(9)
-
6

Ignition OFF

Disconnect C012

Using a DVOM check for continuity between
the oil pressure switch connector and engine
ground
Does the DVOM show continuity?
Repair the
shorted to
ground oil
pressure cir-
cuit as
necessary.
Refer to Wir-
ing Repairs.
Go to Step
(7)
7
Inspect ECU-B connector pin C1 for damage
corrosion or contamination
Did you find a problem? Repair the
circuit as ne-
cessary.
Refer to Wir-
ing Repairs in
Engine Elec-
trical.
Go to Step
(8)