SOLENOID AS 8C3667 - Caterpillar

This procedure covers the following codes:
Table 1
Diagnostic Trouble Codes for the Motorized Valves
J1939 Code Description Notes
2791-5 Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Below Normal The Electronic Control Module (ECM) detects the following conditions:
A low current condition in the output for the Exhaust Gas Recirculation (EGR) valve for at least 0.6 seconds.
The battery voltage is at least 10 VDC.
The warning lamp will flash. The engine will be derated.
2791-6 Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Above Normal The ECM detects the following conditions:
A high current condition in the output for the EGR valve for at least 0.6 seconds.
The battery voltage is at least 10 VDC.
The warning lamp will flash. The engine will be derated.
2791-7 Engine Exhaust Gas Recirculation (EGR) Valve Control : Not Responding Properly The ECM detects the following conditions:
The signal from the EGR valve position sensor indicates that the valve is not in the desired position.
This diagnostic code can be caused by a loss of the 5 VDC supply to the EGR valve position sensor.
The warning lamp will flash. The engine will be derated.
5419-5 Engine Throttle Actuator #1 : Current Below Normal The ECM detects the following conditions:
A low current condition in the output for the engine intake throttle valve for at least 0.6 seconds.
The warning lamp will come on.
5419-6 Engine Throttle Actuator #1 : Current Above Normal The ECM detects the following conditions:
A high current condition in the output for the engine intake throttle valve for at least 1 second.
The warning lamp will come on.
5419-7 Engine Throttle Actuator #1 : Not Responding Properly The ECM detects the following conditions:
The signal from the intake throttle valve position sensor indicates that the valve is not in the desired position.
This diagnostic code can be caused by a loss of the 5 VDC supply to the intake throttle valve position sensor.
The engine will be derated. The ECM will log the diagnostic code. The following background information is related to this procedure:EGR ValveThe EGR valve is used to control the amount of exhaust gas which is recirculated into the intake manifold.The amount of exhaust gas that is required is calculated by the software that is contained in the ECM. The EGR valve is controlled by a PWM signal from the ECM.Intake Throttle ValveThe intake throttle valve is used to increase the exhaust gas temperature to aid the regeneration process.
Illustration 1 g03728445
Schematic diagram for the motorized valves
Illustration 2 g03728447
Typical view of the pin locations on the 62-pin engine interface connector for the motorized valves
(29) EGR valve PWM signal
(30) EGR valve return
(33) EGR valve position sensor 5 VDC supply
(34) EGR valve position sensor signal
(35) EGR valve position sensor ground
(37) Intake throttle valve PWM signal
(38) Intake throttle valve return
(41) Intake throttle valve position sensor 5 VDC supply
(42) Intake throttle valve position sensor signal
(43) Intake throttle valve position sensor ground
Illustration 3 g03616849
Typical view of the pin locations on the J2 connector for the motorized valves.
(8) Intake throttle valve position sensor 5 VDC supply
(9) EGR valve position sensor 5 VDC supply
(24) EGR valve position