Toyota RAV4 (XA40) 2013-2018 Service Manual: Parts location
System diagram
The configuration of the electronic control system in the
u140f automatic transaxle is as shown in the following chart.
System description
- System description
- The electronic controlled automatic transaxle
(ect) is an automatic transaxle that electronically
controls shift timing using the engine control
module (ecm). The ecm detects electrical signals
that indicate engine and driving conditions, and
controls the shift point based on driver habits and
road conditions. As a result, fuel efficiency and
power transaxle performance are improved.
Shift shock is reduced by controlling the engine and
transaxle simultaneously.
In addition, the ect has the following features:
- Diagnostic function.
- Fail-safe function when a malfunction occurs.
How to proceed with
troubleshooting
Hint:
- The ecm of this system is connected to the can and
multiplex communication system. Therefore, before
starting troubleshooting, make sure to check that there is
no trouble in the can and multiplex communication
systems.
- *: Use the intelligent tester.
- Vehicle brought to workshop
- Customer problem analysis
- Inspect battery voltage
Standard voltage:
11 to 14 v
If the voltage is below 11 v, recharge or replace the battery
before proceeding.
- Connect intelligent tester to dlc3*
- Check and clear dtcs and freeze frame data*
- Refer to the dtc check / clear (see page ax-29).
- Visual inspection
- Setting check mode diagnosis*
- Refer to the check mode procedure (see page
ax-30).
- Problem symptom confirmation
- Refer to the road test (see page ax-12).
Result
- Symptom simulation
- Refer to the electronic circuit inspection
procedure (see page in-37).
- Dtc check*
- Refer to the dtc check / clear (see page ax-29).
Result
- Basic inspection
- Refer to the automatic transmission fluid (see
page ax-102).
- Refer to the park/neutral position switch (see
page ax-108).
- Refer to the floor shift assembly (see page ax-
136).
- Mechanical system tests
- Refer to the mechanical system tests (see page
ax-15).
- Hydraulic test
- Refer to the hydraulic test (see page ax-16).
- Manual shifting test
- Refer to the manual shifting test (see page ax-
17).
- Problem symptoms table chapter 1
- Refer to the problem symptoms table (see page
ax-21).
- Problem symptoms table chapter 2
- Refer to the problem symptoms table (see page
ax-21).
- Part inspection
- Dtc chart
- Refer to the diagnostic trouble code chart
(see page ax-35).
- Circuit inspection
- Identification of problem
- Repair or replace
- Confirmation test
End
Notice:
Perform the reset memory procedures (a/t
initialization) when replacing the automatic transaxle
assembly, engine assembly or ecm (see page ax-18).
Hint:
Reset memory cannot be completed b ...
Problem symptom confirmation
Based on the result of the customer problem
analysis, try to reproduce the symptoms. If the
problem is that the transaxle does not shift up, shift
down, or ...
Other materials:
Terminals of ecu
Check occupant classification ecu
Measure the voltage of the connector.
...
Oxygen (a/f) sensor heater control circuit
Hint:
Although the dtc titles say oxygen sensor, these dtcs relate to the
air-fuel ratio (a/f) sensor.
Sensor 1 refers to the sensor mounted in front of the three-way
catalytic converter (twc) and
located near the engine assembly.
Description
Refer to dtc p2195 (see page es-292 ...
Electronic control
Removal and installation of battery
terminal
Notice:
Certain systems need to be initialized after
disconnecting and reconnecting the cable from
the negative (-) battery terminal.
Before performing electronic work, disconnect
the cable from the negative (-) battery terminal to
...