Troubleshooting

RENR2696-01 157
Troubleshooting Section
I. Turn the keyswitch to the ON position. The engine
should be OFF.
J. Observe the status of the “Engine Oil Level” on
the electroni
c service tool.
Expected Result:
The electronic service tool should indicate “OK” when
the wire short is installed. The electronic service
tool should in
dicate “LOW” when the wire short is
removed.
Results:
•
OK – The electronic service tool screen indicates
“OK”, when th
ewireshortisinstalled.The
electronic service tool screen indicates “LOW”,
when the wire short is removed. The harness is
faulty.
Repair: Repair the connectors or wiring and/or
replace the
connectors or wiring.
STOP.
•
Not OK – The electronic service tool screen does
not indicate “OK”, when the wire short is in place.
The electro
nic service tool screen does not indicate
“LOW”, when the wire short is removed. The ECM
is not reading the switch position.
Repair: Replace the ECM. Refer to the diagnostic
procedure Troubleshooting, “Replacing the ECM”.
STOP.
i01798871
Engine Press ure Sensor Open
orShortCircuit-Test
System Ope
ration Description:
Use this procedure under the following
condition
s:
Use this procedure if another procedure has directed
you here.
Also use this procedure when there is an
active fault for any of the following sensors:
•
Oil press
ure sensor
•
The sensor for the Intake Manifold Pressure
The following background information is related
to this procedure:
The troubleshooting procedures for the diagnostic
codes of each pr
essure sensor are identical.
The pressure sensors are sensors that have
three terminals. The pressure sensors are active
sensors. Acti
ve sensors require supply voltage from
the Electronic Control Module (ECM). The ECM
connector J1/P1 terminal 26 supplies +5 volts to
terminal “A”
of each sensor. The ECM connector
J1/P1 terminal 34 is the common connection for the
pressure sensors. The sensor common connection
is shared be
tween all of the pressure sensors. The
common line is connected to each sensor connector
terminal “B”. The signal voltage from terminal “C” of
each sensor
is supplied to the appropriate terminal at
the ECM connector J1/P1.
Use this pro
cedure for the following diagnostic
codes:
•
100-03 Engi
ne Oil Pressure Sensor Open Circuit
or Shorted High
•
100-04 Eng
ine Oil Pressure Sensor Shorted Low
•
100-10 Engine Oil Pressure Sensor Power Supply
Open Circu
it
•
102-03 Intake Manifold Pressure Sensor Open
Circuit or
Shorted High
•
102-04 Intake Manifold Pressure Sensor Shorted
Low
•
102-10 Intake Manifold Pressure Sensor Power
Supply Ope
nCircuit
Note: The following diagnostic codes should not be
active:
•
262-03 5 Volt Sensor Supply, voltage more than
normal
•
262-04 5 Volt Sensor Supply, voltage less than
normal