Series 40E Troubleshooting – Section 44.1 Circuit Functions – Vehicle Retarder

For the Vehicle Retarder function diagram, see Figure
“Vehicle Retarder Function Diagram”

. ‪

Click to see this graphic in a separate window
1. Engine Oil Pressure Sensor‪ 5. Accelerator Position/Idle Validation‪
2. Camshaft Position Sensor‪ 6. Barometric Pressure Sensor‪
3. Injection Control Pressure‪ 7. Manifold Absolute Pressure Sensor‪
4. ECM‪

Figure 1. Vehicle Retarder Function Diagram

On engines or vehicles equipped with an engine brake or a transmission retarder, the Vehicle Retarder Circuit (VRE) function is to control the relay or solenoids that turn the brake or retarder on and off. This circuit has many applications and can be wired in many configurations. ‪

Section 44.1.1
Fault Detection and Management

An open or short to ground can be detected on the coil side of the engine brake relay during an On Demand Engine Standard Test by the technician.‪


Series 40E Troubleshooting Manual – 6SE241
Generated on 10-13-2008