Questions (Frequently Most
Tested) with Verified Answers
You are using a diagnostic symptom chart to diagnose an electronically controlled 5-speed automatic
RWD (rear wheel drive) transmission with a strange noise in drive. Technician A says the control valve
could be the cause and is an OFF-vehicle procedure. Technician B says the oil pump assembly could be
the cause and is an OFF-vehicle procedure. Who is right? - Answer: Technician B is correct because the
oil pump assembly could be the diagnostic item and is an OFF-vehicle procedure. Technician A is wrong
because the control valve is likely to be the cause in an ON-vehicle procedure, NOT an OFF-vehicle
procedure.
On an electronically controlled 4-speed automatic transaxle, you experience a "shock" when shifting
from "N" to "D." Which of the following will require an OFF-vehicle repair? - Answer: The only OFF-
vehicle repair listed for a vehicle that exhibits a shock when shifting from "N" to "D" range is the
FORWARD clutch. All of the other distracters are ON-vehicle repairs.
Preliminary diagnosis on an electronically controlled automatic transmission/transaxle consists of all the
following tests: - Answer: Line pressure test, Fluid Check and Stall Test
Technician A says engine, suspension and driveline problems may appear to be caused by the
transmission or transaxle. Technician B says you start with the simple inspections first to ensure that you
have not overlooked something and you can use the scan tool for further clarification. Who is right? -
Answer: Both technicians are correct. Tech A is right because many suspension and driveline concerns
and noises may appear to be caused by the transmission or transaxle, when they are caused by the
suspension. For diagnosis, you put the transmission in neutral and see if the concern changes or goes
away. If it goes away, the automatic transmission should be investigated. Tech B is right because you
always do the easy and simple inspections first to make sure that you have not overlooked something
and you can use the scan tool for further clarification
You are checking fluid color on an automatic transmission/transaxle. Which of the following will cause
the fluid to be varnished with a light to dark brown color? - Answer: Oxidation from under or overfilling
will cause the fluid to be varnished with a light to dark brown color.