(Table 97, contd)
Diagnostic Trouble Codes for the Solenoid Valves
J1939
Code
Description
Notes
1076-2 Engine Fuel Injection
Pump Fuel Control
Valve : Erratic, Intermit-
tent, or Incorrect
The Electronic Control Module (ECM) detects an intermittent open or short circuit er-
ror in the control circuit for the fuel metering valve on the high-pressure fuel pump.
This diagnostic code will not be active if a continuous fault in the circuit is detected.
1076-6
Engine Fuel Injection Pump
Fuel Control Valve : Current
Above Normal
The ECM detects the following conditions:
A high current condition in the output from the ECM to the solenoid for the fuel metering valve on the
high-pressure fuel pump for at least 0.2 seconds.
The battery voltage is at least 9.5 VDC.
The engine will be derated.
1188-5
Engine Turbocharger Waste-
gate Actuator 1 Position :
Current Below Normal
The ECM detects the following conditions:
A low current condition in the output from the ECM to the solenoid for the wastegate regulator for at
least 0.2 seconds.
The battery voltage is at least 10 VDC.
The engine will be derated. The diagnostic code will be logged.
1188-6
Engine Turbocharger Waste-
gate Actuator 1 Position :
Current Above Normal
The ECM detects the following conditions:
A high current condition in the output from the ECM to the solenoid in the wastegate regulator for at
least 0.2 seconds.
The battery voltage is at least 10 VDC.
The diagnostic code will be logged.
The following background information is related
to this procedure:
Electronically controlled wastegate
The engine has a turbocharger with an electronically
controlled wastegate. Typically, the wastegate is a
mechanical valve that is used in the turbocharger in
order to regulate the intake manifold pressure to a set
value.
The control system for the electronically controlled
wastegate precisely regulates the intake manifold
pressure by using a wastegate regulator to control the
wastegate.
The required intake manifold pressure is calculated
by the software that is contained in the ECM. The
ECM uses the wastegate regulator to control the
wastegate in order to provide the precise value of
intake manifold pressure. The solenoid in the
wastegate regulator is controlled by a PWM signal.
Fuel metering valve for the high-pressure fuel
pump:
The high-pressure fuel pump is equipped with a fuel
metering valve. The fuel metering valve precisely
controls the amount of fuel that enters the high-
pressure fuel pump.
The amount of fuel that is required is calculated by
the software that is contained in the ECM. The
solenoid in the suction control valve is controlled by a
PWM signal from the ECM.
200
UENR0612
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