Toyota RAV4 (XA40) 2013-2018 Service Manual: Communication
Description
The skid control ecu sends signals such as cruise control cancel demand signals and brake operation demand from ecm response signals to the ecm when the cruise control system is in operation.
Inspection procedure
Hint:
This circuit uses can communication. Therefore, if there are any malfunctions in the communication circuit, one or more dtcs in the can communication system are output.
- Check can communication system
Refer to how to proceed with troubleshooting (see page ca-8).
Description
Therefore, if the skid control ecu detects a communication error from the ecm, it sends a malfunction signal back to the ecm.
Inspection procedure
Hint:
This circuit uses can communication. Therefore, if there are any malfunctions in the communication circuit, one or more dtcs in the can communication system are output.
- Check can communication system
Refer to how to proceed with troubleshooting (see page ca-8).
Brake system malfunction
Description
This dtc is output when the vsc system has a problem. Check the vsc system
when this dtc is
output.
Inspection procedure
Hint:
This circuit uses can communication. Therefore ...
Cruise control switch circuit
Description
This circuit sends signals to the ecm depending on the cruise control switch
condition. The battery
supplies positive (+) battery voltage to the cruise control switch. Then
terminal ...
Other materials:
Solar sensor circuit (passenger side)
Description
The solar sensor, which is installed on the upper side of the instrument
panel, detects sunlight and
controls the air conditioning auto mode. The output voltage from the solar
sensor varies in accordance
with the amount of sunlight. When the sunlight increases, the output volt ...
How to proceed with troubleshooting
Hint:
Use these procedures to troubleshoot the cruise control
system.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 to 14 v
If the voltage is below 11 v, recharge or replace the battery
before proceeding.
Che ...
Random / multiple cylinder misfire detected
Description
When the engine misfires, high concentrations of hydrocarbons (hc) enter the
exhaust gas. Extremely
high hc concentration levels can cause increases in exhaust emission levels.
High concentrations of hc
can also cause increases in the three-way catalytic converter (twc) te ...
