Toyota RAV4 (XA40) 2013-2018 Service Manual: Fail-safe chart
- Fail-safe chart
This function minimizes the loss of the ect functions when a malfunction occurs in a sensor or solenoid.
- Automatic transmission fluid (atf) temperature sensor: when the atf temperature sensor has a malfunction, o/d up-shift is prohibited
- Counter gear speed sensor nc (speed sensor nc): when the counter gear speed sensor has a malfunction, o/d up-shift is prohibited.
- Shift solenoid valve dsl:
when the solenoid valve dsl has a malfunction, the
current to the solenoid valve is stopped.
This stops lock-up control, then fuel economy decreases.
- Shift solenoid valve sl1, sl2 and s4:
if any of the shift solenoid valve circuits develops an
open or short, the ecm turns the other shift solenoid
"on" and "off" in order to shift into the gear
positions shown in the table below.
Manual shifting as shown in the following table must be done. In case of a short circuit, the ecm stops sending the current to the short circuited solenoid.
Even if starting the engine in the fail-safe mode, the gear position remains in the same position.
Hint:
- ?
: Condition in the normal
operation is shown above the
. - ?
: Condition in the
fail-safe mode is shown beneath the
. - E/b: engine brake.
Check mode procedure
Description
Check mode has a higher sensitivity to malfunctions
and can detect malfunctions that normal mode
cannot detect. Check mode can also detect all the
malfunctions that normal m ...
Data list / active test
Read data list
Hint:
Using the intelligent tester's data list allows switch,
sensor, actuator, and other item values to be read
without removing any parts. Reading the data list
early in tro ...
Other materials:
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 and environment in which the
problem occurred in the customer's vehicle should be
carried out. No ...
Room temperature sensor circuit
Description
The room temperature sensor is installed in the instrument panel to detect
the room temperature and
control the heater and air conditioner auto mode. The resistance of the room
temperature sensor
changes in accordance with the room temperature. As the temperature decreases,
...
Short in front driver side - side squib circuit
Description
The driver side - side squib circuit consists of the center airbag sensor and
the front seat side airbag lh.
This circuit instructs the srs to deploy when the deployment conditions are met.
These dtcs are recorded when a malfunction is detected in the driver side - side
sq ...
