If an OBD II PCM has set a catalyst efficiency code, all of the following pre-checks should be performed before condemning the converter EXCEPT for: 

A. checking the exhaust system for any leaks
B. using a scan tool to check for O2 sensor codes
C. visually checking the O2 sensors for cracked housings
D. verifying that the engine does not have excessive cycling


Answer: D

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Standard takeoff sheets are used to _____.

a. provide a permanent record, reduce the workload, and supplement the as-built drawings b. reduce the workload, decrease the potential for error, and supplement the as-built drawings c. decrease the potential for error, reduce the workload, and provide a permanent record d. supplement the as-built drawings, decrease the potential for error, and provide a permanent record

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?What is the numeric SA of the engine controller on the J1939 bus?

A. ?00 B. ?03 C. ?128 D. ?130

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Overlapping stringer beads must be carefully cleaned to prevent _____

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