Valve Position - Test - Perkins 854F-E34T Troubleshooting Manual

UENR0612
(Table 111, contd)
Troubleshooting Test Steps
6. Check the Ground Wire for the Switch
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector from the air filter restriction
switch.
C. Fabricate a jumper wire. Install the jumper wire between
the signal terminal on the harness connector for the switch
and a suitable ground.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to check for an active 107-2
diagnostic code. Wait at least 10 seconds for activation of the
diagnostic code.
F. Turn the keyswitch to the OFF position.
G. Remove the jumper wire.
7. Check the Wiring for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the switch. Disconnect the P1
connector from the ECM.
C. Use a suitable multimeter to measure the resistance be-
tween P1:87 and the signal terminal on the harness connector
for the switch.

Valve Position - Test

This procedure covers the following codes:
Table 112
J1939
Code
27-3 Engine Exhaust Gas Recirculation
Valve Position : Voltage Above
Normal
This document has been printed from SPI2. NOT FOR RESALE
Diagnostic Trouble Codes for the Valve Position Sensors
Description
The Electronic Control Module (ECM) detects that the signal voltage from the position sensor
on the NOx Reduction System (NRS) valve is greater than 4.8 VDC for at least 0.5 seconds.
The battery voltage is at least 10 VDC.
The ECM will set the valve to the default position while this code is active. The default position
is 0 percent.
The engine will be derated.
Values
Diagnostic code Result: The fault is cleared with the jumper installed.
The fault is in the ground wire between the air filter restriction
switch and battery negative.
Check all wiring between the switch and the ECM. Refer to the
Electrical Schematic for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: A 107-2 diagnostic code is active with the jumper
installed.
Proceed to Test Step 7.
Less than 5 Result: The measured resistance is greater than 5 Ohms.
Ohms
There is an open circuit or high resistance in the wiring between
the air filter restriction switch and the ECM.
Check all wiring between the switch and the ECM. Refer to the
Electrical Schematic for the application.
Replace the faulty wiring.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result: The measured resistance is less than 5 Ohms.
Contact the Dealer Solution Network (DSN).
i06020913
Results
Notes
229
Circuit Tests
(continued)