Express 1/2 Ton Van V8-5.7L VIN R (1999)
The Control Module can monitor the pintle position with the EGR pintle position signal. This sensor uses a variable resistor with a 5 volt reference, a
signal circuit and a ground. The signal circuit monitors changes in voltage on the variable resistor as the pintle moves.
An intermittent may be caused by any of the following conditions:
^
A poor connection
^
Rubbed through wire insulation
^
A broken wire inside the insulation
Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Intermittents and Poor Connections Diagnosis. See:
Computers and Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures
Test Description
The numbers below refer to the step numbers in the diagnostic table.
2. At idle the EGR valve should not be open greater than 0%.
3. This step checks the ability of the pintle to be manually commanded to the desired positions.
5. This step checks the electrical circuit for a short to voltage.
6. This step checks the electrical control circuits from the VCM to the EGR valve.
