Test Your Knowledge

Question 1 of 15

1. Question

What is the correct total resistance of the J1939 datalink?

30 Ohms
120 Ohms
60 Ohms
90 Ohms

Question 2 of 15

2. Question

Which J1939 datalink connects all the OEM smart devices and can be connected to through the 9-pin connector?

Internal
Public
External
Private

Question 3 of 15

3. Question

What best describes an INSITE™ ECM Image?

Contains only ECM Features & Parameters
A picture of the ECM and its dataplate
A snapshot of all ECM data including current fault codes
Contains only the engine Trip Information history

Question 4 of 15

4. Question

Which of the following is NOT included in a Fault Code Overview?

Conditions for Setting the Fault Codes
Conditions for Clearing the Fault Codes
Component Location
Fault Repair Directions

Question 5 of 15

5. Question

What does EDS (fault troubleshooting software) stands for?

Evaluate Diagnose Service
Expert Diagnostic System
Engine Diagnosis System
Engine Diagnostic Support

Question 6 of 15

6. Question

A HPCR fuel system operate at up to?

300 psi
3000 psi
13,000 psi
30,000+ psi

Question 7 of 15

7. Question

Which statement is NOT true about the low-pressure side of the HPCR fuel system?

Must provide sufficient volume for proper high-pressure pump performance
Requires special diagnostic tool for proper testing
Contains at least two (2) fuel filters
A 0 – 300 psi gauge is sufficient for testing the whole system

Question 8 of 15

8. Question

All HPCR fuel system tests should be performed…

When engine is cold
With the hood open
On a dyno
While simulating full-load condition

Question 9 of 15

9. Question

Which of the following is NOT a high-pressure fuel system test?

Maximum Rail Pressure at Idle Test
High-Pressure Leak Down Test
High-Pressure Pump Performance Test
Fuel Injector Return Flow Test

Question 10 of 15

10. Question

Which of the following is NOT a test of the low-pressure fuel system?

Fuel Inlet Restriction Test
Injector Return Flow Test
Gear Pump Pressure Test
Fuel Filter Pressure Drop

Question 11 of 15

11. Question

What emission does exhaust gas recirculation (EGR) reduce?

Particulate Matter (PM)
Hydrocarbons (HC)
Carbon Monoxide (CO)
Oxides of Nitrogen (NOx)

Question 12 of 15

12. Question

Which of the following statements is true about a DPF?

It is acceptable for a small amount of visible smoke to pass through
Reduces NOx emissions
Oxidizes soot at temperatures above 600˚F
Turns soot into ash during a regeneration

Question 13 of 15

13. Question

Diesel Exhaust Fluid (DEF) is decomposed in the exhaust system to form _________.

Ammonia (NH3)
Urea (CH4N2O)
Water (H2O)
Methane (CH4)

Question 14 of 15

14. Question

DEF is composed of water and ________% urea.

53.2%
52.3%
35.2%
32.5%

Question 15 of 15

15. Question

Which is NOT true about the Intake & Outlet NOx sensors?

They can be swapped for one another
Responsible for monitoring SCR efficiency
Internally heated
Communicate over the J1939 datalink (smart devices)

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