Toyota RAV4 (XA40) 2013-2018 Service Manual: Symptom confirmation and diagnostic trouble code
Hint:
The diagnostic system in the rav4 has various functions.
- The first function is the diagnostic trouble code (dtc) check. A dtc is a code stored in the ecu memory whenever a malfunction in the signal circuits to the ecu occurs. In a dtc check, a previous malfunction's dtc can be checked by a technician during troubleshooting.
- Another function is the input signal check, which
checks if the signals from various switches are sent to
the ecu correctly.
By using these functions, the problem areas can be narrowed down and troubleshooting is more effective.
Diagnostic functions are incorporated in the following system in the rav4.
- In the dtc check, it is very important to determine whether the problem indicated by the dtc is either: 1) still occurring, or 2) occurred in the past but has since returned to normal. In addition, the dtc should be compared to the problem symptom to see if they are related. For this reason, dtcs should be checked before and after confirmation of symptoms (i.E., Whether or not problem symptoms exist) to determine current system conditions, as shown in the flowchart below.
- Never skip the dtc check. Failing to check dtcs may, depending on the case, result in unnecessary troubleshooting for systems operating normally or lead to repairs not related to the problem. Follow the procedures listed in the flowchart in the correct order.
- The following flowchart shows how to proceed with troubleshooting using the dtc check. Directions from the flowchart will indicate how to proceed either to dtc troubleshooting or to the troubleshooting of each problem symptom.
The problem is still occurring in a place other than the diagnostic circuit (the dtc displayed first is either for a past problem or a secondary problem).
Customer problem analysis
Hint:
In troubleshooting, confirm that the problem symptoms
have been accurately identified. Preconceptions should be
discarded in order to make an accurate judgment. To
clearly understand w ...
Symptom simulation
Hint:
The most difficult case in troubleshooting is when no
problem symptoms occur. In such a case, a thorough
problem analysis must be carried out. A simulation of the
same or similar conditions ...
Other materials:
Riding with children
Observe the following precautions
when children are
in the vehicle.
Use a child restraint system
appropriate for the child,
until the child becomes
large enough to properly
wear the vehicle's seat belt.
It is recommended that children
sit in the rear seats to
avoid accidental contact
with the ...
Disassembly
Hint:
Use the same procedures for the rh side and lh side.
The procedures listed below are for the lh side.
Remove no. 1 Rear seat reclining cover lh
Remove the 2 screws.
Using a screwdriver, detach the 5 claws and remove
the cover.
Hint:
Tape the screwdriver tip before ...
Problem symptoms table (2006/01- )
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "suspected area" column
of the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace p ...
