Perkins NJ Series Troubleshooting Manual page 153

SENR9982-01
Illustration 54
Fuel rail pressure sensor
(1) Voltage supply (Vs)
(2) Ground (GND)
(3) Signal (SIG)
Illustration 55
Intake manifold pressure sensor
(1) Voltage Supply (Vs)
(2) Ground (GND)
(3) Signal (SIG)
Illustration 56
Typical example of the oil pressure sensor
(1) Voltage Supply (Vs)
(2) Ground (GND)
(3) Signal (SIG)
The troubleshooting procedures for the diagnostic
codes of each pressure sensor are identical. The
pressure sensors are active sensors. The pressure
sensor has three terminals. Active sensors require
supply voltage from the ECM. The ECM connector
P2/J2 supplies +5 volts to terminal 1 of each
sensor. The common line is connected to each
sensor connector terminal 2. The signal voltage
from terminal 3 of each sensor is supplied to the
appropriate terminal at the ECM connector P2/J2.
Test Step 1. Verify All Active Diagnostic
Codes.
A. Turn the keyswitch to the ON position. Wait at
g01170309
least 10 seconds for activation of the diagnostic
codes.
B. Verify if any of the following diagnostic codes are
active:
•
0100-03 Engine Oil Pressure Sensor voltage
above normal
• 0100-04 Engine Oil Pressure Sensor voltage
below normal
•
0100-10 Engine Oil Pressure Sensor abnormal
rate of change
• 1785-03 Intake Manifold Pressure Sensor
voltage above normal
•
1785-04 Intake Manifold Pressure Sensor
voltage below normal
g01170310
• 1785-10 Intake Manifold Pressure Sensor
abnormal rate of change
• 1797-03 Fuel Rail Pressure Sensor voltage
above normal
• 1797-04 Fuel Rail Pressure Sensor voltage
below normal
Expected Result:
One or more of the preceding diagnostic codes are
active.
Results:
• OK – Proceed to Test Step 2.
•
Not OK
g01170311
Repair: Do not use this procedure if 1785-10
or 100-10 diagnostic codes are active. Refer to
Troubleshooting, "5 volt Sensor Supply Circuit-
Test". When this test is complete, return to the start
of this test.
153
Troubleshooting Section