Toyota RAV4 (XA40) 2013-2018 Service Manual: System description
- Engine immobiliser system description
The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ecu that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ecu sends a signal to the ecm to prohibit fuel delivery and ignition, effectively disabling the engine.
- Function of main component
- System function
- When the transponder key ecu detects that the
unlock warning switch is on, the ecu provides
current to the transponder key coil and produces a
faint electric wave. A transponder chip in the key grip
receives the wave and outputs a key id code signal.
The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then the signal is transmitted to the ecu. The ecu matches the key's id code with the vehicle's id code, which was previously registered in the ecu and then communicates the results to the ecm using sfi communication.
- After the identification results show that the key's id code matches the vehicle's id code and the ecu has confirmed their match: 1) the engine immobiliser system is canceled and the engine starting controls (fuel injection control and ignition control) enter standby mode; and 2) the ecu receives a security indicator light signal, and turns the security indicator light off.
Engine immobiliser system
Parts location
System diagram
...
How to proceed with troubleshooting
Hint:
Use these procedures to troubleshoot the engine immobiliser
system.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 t ...
Other materials:
Handling of hose clamps
Before removing the hose, check the clamp position
so that it can be reinstalled in the same position.
Replace any deformed or dented clamps with new
ones.
When reusing a hose, attach the clamp on the
clamp track portion of the hose.
For a spring type clamp, you may want to spread ...
Reassembly
Hint:
When installing the ornament plate and emblem, heat the
radiator grille, ornament plate and emblem using a heat light.
Standard heating temperature
Notice:
Do not heat the radiator grille, ornament plate and
emblem excessively.
Install radiator grille emblem
Attach ...
Inspection
Inspect engine coolant temperature sensor
Measure the resistance of the sensor.
Standard resistance
Notice:
If checking the sensor in water, be careful not to
allow water to contact the terminals. After
checking, wipe the water off the sensor.
If the result is not as specified, ...
