The EBP sensor is supplied with a 5 V reference voltage at Pin 2 from ECM Pin X1–14. The EBP sensor is grounded at Pin 1 from ECM Pin X1–6. The EBP sensor returns a variable voltage signal from Pin 3 to ECM Pin X2–8.
Fault Detection / Management
When the EBP signal voltage is detected out of range high or low, the ECM will cause the engine to ignore the EBP signal. The EGR valve will close and the ECM will rely on the VGT pre-programmed values.
EBP Diagnostic Trouble Codes (DTCs)
DTCs are read using the EST or by counting the flashes from the amber and red ENGINE lamp.
DTC 341
EBP signal out-of-range low
• DTC 341 is set by the ECM when the EBP signal is less than 0.039 V for more than 0.5 second.
• DTC 341 can be set due to an open or short to ground on the signal circuit, a failed EBP sensor or an open VREF circuit or VREF short to ground.
• When DTC 341 is active the amber ENGINE lamp is illuminated.
DTC 342
EBP signal out-of-range high
• DTC 342 is set by the ECM when the EBP signal is more than 4.9 V for more than 0.5 second.
• DTC 342 can be set due to a signal circuit shorted to VREF or B+, or a failed EBP sensor.
• When DTC 342 is active the amber ENGINE lamp is illuminated.
DTC 344
Above specification, engine off
• DTC 344 is set by the ECM when the exhaust back pressure is greater than expected with the key-on engine-off.
• DTC 344 can be set due to a plugged EBP sensor, a restriction in the tube leading to the sensor, an open signal ground, or a failed EBP sensor. To check for possible restriction, remove the sensor and tube and inspect for carbon deposits.
• When DTC 344 is active the amber ENGINE lamp is illuminated.
Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
• Digital Multimeter (DMM)
• 3-Banana Plug Harness
• 500 Ohm Resistor Harness
• Breakout Box
• Breakout Harness
• Terminal Test Adapter Kit
