Exam 19: On Board Diagnostics

Technician A says that if all the sensors and components of the aftertreatment system are removed, the OBD-II system will not be able to detect faults in the absence of electrical signals. Technician B says that the comprehensive component monitor (CCM) will set emission-related fault codes. Who is correct?

What attached to the body near the engine compartment designates vehicles that comply with either federal EPA (Environmental Protection Agency) or California Air Resource Board (CARB) emission standards?

Which of the 10 OBD (on-board diagnostics) modes enables the scan tool or software to perform onboard activation tests?

Technician A says that a pending fault will not have a DTC that can be retrieved by a scanner or electronic service tool. Technician B says a pending fault will never have freeze-frame data associated with it. Who is correct?

The SAE standard J-1962 specifies that the D-shaped DLC must contain ---___ terminals.

Technician A says that a pending fault will not have a DTC that can be retrieved by a scanner or electronic service tool. Technician B says a pending fault will never have freeze-frame data associated with it. Who is correct?

OBD (on-board diagnostics) use how many different diagnostic services, more commonly known as OBD modes?

Two technicians are explaining (MPC) model predictive control and fault accommodation. Technician A says that MPC uses advanced algorithms that generate virtual lookup tables for control loops while the vehicle is in operation. Technician B says that MPC control can be observed by watching videos of engine simulators in which a 3D representation of an engine rotates and responds to inputs. Who is right?

Which of the following is a critical enabling condition for a 2018 misfire monitor?

Which emissions system monitor will detect incorrect injection timing?

Which of the following narrow down the location of a fault or abnormal system condition but require further testing to differentiate between several possible root causes and verify the root cause?

A CARB (California Air Resource Board)-certified Tier 2 bin 5 vehicle has a Federal Test Procedures (FTP) protocol limiting NOx to no more than:

Two technicians are discussing the purpose of OBD-II compliant systems for automotive diesel engines. Technician A says that an OBD-II compliant system is designed to identify or self-diagnose emission-related faults and report fault codes. Technician B says the OBD-II rules are set up to enable drivers to have emissions problems repaired quickly and easily. Who is correct?

Since 2004, what SAE standard has enabled a unique network interface communication device to upload new software?

Which of these OBD (on-board diagnostic) codes are also vital for technicians to validate before returning a vehicle to the customer?

Which OBDII (On Board Diagnostics Generation II) monitor must make sure that there is adequate airflow to support combustion?

Which of the following allowed anyone with an Android phone to read and clear fault codes, as well as access a tremendous volume of other OBD (on-board diagnostics) data?

Two technicians are discussing the purpose of OBD-II compliant systems for automotive diesel engines. Technician A says that an OBD-II compliant system is designed to identify or self-diagnose emission-related faults and report fault codes. Technician B says the OBD-II rules are set up to enable drivers to have emissions problems repaired quickly and easily. Who is correct?

Which of the following changes will take place when a manufacturer updates a software calibration and a technician uploads or flashes the vehicle with the new calibration?

Before returning a vehicle to the customer after repairing the cause of the MIL being illuminated, the technicians should ______________.