Logic Codes (Mechanical Failures); Diagnosing Flash Code 39; Egr Valve Not Responding - Detroit Diesel Series 60 EGR Technician Manual

DDEC IV DIAGNOSTIC CODES
DDC Code #
PID
(Flashed)
82 411
82 412
83 73
83 411
83 412
85 190
85 190
86 73
86 108
87 73
87 108

LOGIC CODES (MECHANICAL FAILURES)

Logic codes indicate the detection of mechanical failures by the DDEC system. The response
will be a Flash Code.

Diagnosing Flash Code 39

Failure Mode: SID 146, FMI 7 — EGR Valve Not Responding
Indicates: EGR flow requested by DDEC and no EGR flow detected.
SID 146, FMI 7 will be set by the ECM if, the signal from the Delta P sensor and EGR
temperature sensor indicate EGR flow is below a minimum allowable flow when the ECM is in
"EGR Mode" for a period greater than 50 seconds.
Response: The CEL will be illuminated and the system will be forced into "Boost Mode" (EGR is
Disabled) for the remainder of the ignition cycle.
Possible Causes:
Defective Delta P sensor
EGR valve mechanical failure (closed)
Exhaust leaking at the S Pipe
Exhaust leaking at the EGR valve
Leaking air lines from the VPOD to the actuators (insufficient air supply)
Leaking or low vehicle air supply to the VPODs
Plugged Delta P ports
Plugged EGR cooler
VPOD mechanical failure
VNT vanes stuck in an open position
4-6
SID FMI
— 4 EGR Delta pressure circuit failed low
— 4 EGR Temperture circuit failed low
- 0 Pump Pressure High
-
0 EGR Delta Pressure High
- 0 EGR Temperature High
- 0 Engine Overspeed
-
14 Engine Overspeed Signal
-
3 Pump Pressure Sensor Input Voltage High
- 3 Barometric Pressure Sensor Input Voltage High
- 4 Pump Pressure Sensor Input Voltage Low
-
4 Barometric Pressure Sensor Input Voltage Low
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION
Description
All information subject to change without notice. (Rev. June 2005)