Perkins 854E-E34TA, Руководство по устранению неисправностей, Страница: 230 / 252

(Table 112, contd)
Diagnostic Trouble Codes for the Valve Position Sensors
J1939
Code
Description Notes
27-4 Engine Exhaust Gas Recirculation
Valve Position : Voltage Below
Normal The ECM detects that the signal voltage from the position sensor on the NRS valve is less
than 0.2 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.
51-3 Engine Throttle Valve 1 Position :
Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the position sensor on the intake throttle valve is greater than 4.75
VDC for at least 0.5 seconds.
The battery voltage is at least 10 VDC.
The intake throttle valve will move to the default position while the diagnostic code is active.
The default position is 0 percent.
51-4 Engine Throttle Valve 1 Position :
Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the position sensor on the intake throttle valve is less than 0.25 VDC
for at least 0.5 seconds.
The intake throttle valve will move to the default position while the diagnostic code is active.
The default position is 0 percent.
Use this procedure in order to troubleshoot the
position sensors for the following valves:
• NRS valve
• Engine intake throttle valve
Each position sensor is an integral part of the
associated valve. If the following procedure indicates
a fault with the position sensor, then the entire valve
must be replaced.
The following background information is related
to this procedure:
The troubleshooting procedures for the diagnostic
codes of each position sensor are identical. The ECM
supplies 5 VDC to terminal
“ 1 ” of the engine intake
throttle valve connector and to terminal “ 6 ” of the
NRS valve connector. The sensor common from the
ECM connector goes to terminal “ 3 ” of the engine
intake throttle valve connector and to terminal “ 4 ” of
the NRS valve connector. The sensor supply is output
short circuit protected. A short circuit to the battery
will not damage the circuit inside the ECM. The signal
voltage from terminal
“ 5 ” of the engine intake throttle
valve and from terminal “ 2 ” of the NRS valve is
supplied to the appropriate terminal at the P2/J2 ECM
connector.
230 UENR0612
Circuit Tests
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