All Information Subject To Change Without Notice. (Rev. June 2005) 7Se60 0506 Copyright © 2005 Detroit Diesel Corporation - Detroit Diesel Series 60 EGR Technician Manual

Driver Questionnaire
Ask the driver to answer the following questions before attempting to repair an intermittent
problem, or a problem with symptoms but no diagnostic codes. Use this and the response as a
guideline. Refer to Questionnaire Response Guideline found on page 1–6.
1. How often does the problem occur? Can you and the driver take the vehicle and
demonstrate the problem in less than 30 minutes?
2. Has the vehicle been to other shops for the same problem? If so, what was done there?
3. Did the radio, dash gages, or lights momentarily turn OFF when the problem occurred?
4. Does the problem occur only at specific operating conditions? If so, at what load? Is it
light, medium, or heavy?
5. Does the problem occur at a specific engine operating temperature? If so, at what engine
temperature?
6. Does the problem occur at a specific engine operating altitude? If so, at what altitude?
7. Does the problem occur only when above or below specific outside temperatures? In
what temperature range?
8. Does the problem occur during other conditions e.g. during or after rain, spray washing,
snow?
9. Did the problem occur at a specific vehicle speed? If so, at what vehicle speed?
10. Does the problem occur at specific engine RPM? If so, at what engine RPM?
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION
SERIES 60 EGR TECHNICIAN'S MANUAL
1-5