SYSTEM DESCRIPTION
IMMOBILISER SYSTEM DESCRIPTION
The immobiliser system is designed to prevent the vehicle from being stolen. This system uses the transponder key ECU assembly that stores the key ID codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the transponder key ECU assembly sends a signal to the ECM to prohibit fuel delivery and ignition, effectively disabling the engine.
FUNCTION OF MAIN COMPONENTS
Component |
Outline |
---|---|
Transponder key ECU assembly |
|
Transponder key coil |
When a key is inserted into the ignition key cylinder, the transponder key amplifier receives the key ID code from the transponder chip in the key grip and outputs it to the transponder key ECU assembly. |
ECM |
The ECM receives key ID code verification results from the transponder key ECU assembly. The ECM also verifies the ECUs. Then judgment of whether to immobilise the engine is made. |
Unlock warning switch assembly |
The unlock warning switch assembly detects if the key is in the ignition key cylinder and outputs the result to the transponder key ECU assembly. |
SYSTEM FUNCTION
(a) When the transponder key ECU assembly detects that the unlock warning switch assembly is on, the transponder key ECU assembly applies current to the transponder key coil and produces a magnetic field around the antenna coil. A transponder chip in the key grip outputs a key ID code signal using electromotive force generated by the magnetic field. The transponder key coil receives the signal and sends it to the transponder key ECU assembly. The transponder key ECU assembly checks if the key ID code received from the transponder key coil matches the registered key ID code.
When the engine is started, the ECM communicates with the transponder key ECU assembly and checks the key verification result. In addition, the ECM checks if the engine ID codes stored in the transponder key ECU assembly and ECM match. If they do not match, the ECM prohibits engine start.
Toyota CH-R Service Manual > Integration Relay: Installation
INSTALLATION
PROCEDURE
1. INSTALL NO. 1 INTEGRATION RELAY
(a) Connect the 2 connectors.
(b) Engage the claws to install the No. 1 integration relay as shown in the illustration.
Install in this Direction
2. INSTALL NO. 1 RELAY BLOCK COVER
(a) Engage the claws to ...
Toyota CH-R Owners Manual > Before driving: Dinghy towing
Your vehicle is not designed to be dinghy towed (with 4 wheels on
the ground) behind a motor home.
NOTICE■To avoid serious damage to your vehicle Do not tow
your vehicle with all four wheels on the ground.
...