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Preparation

1.PRECAUTIONS FOR INSPECTING HYBRID CONTROL SYSTEM
  1. Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

     

    NOTICE:
     
    1. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work .
    2. After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) unless instructed by the repair manual.

     

     


  2. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.


    Preparation 2ZR-FXE ENGINE CONTROL / Lexus CT200h / ZWA10
     

     

    HINT:
     
    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
2.NOTICE FOR HYBRID CONTROL SYSTEM ACTIVATION
  1. When the warning light is illuminated, or the auxiliary battery has been disconnected and reconnected, attempting to turn the power switch on (READY) may not start the system (the system may not enter the READY-on state) on the first attempt. If so, turn the power switch off and reattempt to start the hybrid system.

3.FOR USING INTELLIGENT TESTER

 

CAUTION:
 
Observe the following items for safety reasons:

 

  1. Before using the intelligent tester, read the instruction manual.
  2. Prevent the tester cable from being caught on the pedals, shift lever or steering wheel when driving with the tester connected to the vehicle.
  3. When driving the vehicle for testing purposes using the tester, 2 persons are required. One is for driving the vehicle, and the other operates the tester.
4.DISCONNECTING AND RECONNECTING NEGATIVE AUXILIARY BATTERY CABLE
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  1. Before performing work on electronic components, disconnect the cable from the negative (-) auxiliary battery terminal to prevent damage to the electrical system or electrical components.

    Text in Illustration 
    *1 Cable
    *2 Negative (-) Auxiliary Battery Terminal

     

  2. Before disconnecting and reconnecting the auxiliary battery cable, turn the power switch off and the headlight switch off. Then loosen the terminal nut completely. Do not damage the cable or terminal.

  3. When the auxiliary battery cable is disconnected, the clock and radio settings and stored DTCs are cleared. Therefore, before disconnecting the auxiliary battery cable, make a note of them.
     

     

    NOTICE:
     
    1. After turning power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
    2. When the cable is disconnected from the negative (-) auxiliary battery terminal, initialize the following system(s) after the cable is reconnected.
     
    System Name See Procedure
    Advanced Parking Guidance System Click here
    Power Door Lock Control System

     

5.COOLING FAN SYSTEM

 

NOTICE:
 
  1. When the power switch is turned off and the engine temperature is high, the engine water pump assembly and cooling fans may operate for a maximum of 3 minutes depending on the auxiliary battery voltage.
  2. After turning the power switch off, keep hands and objects away from the fans when they are operating.

 

 

HINT:
 
  1. If all of the following are met for a certain period of time during a few minutes immediately before the power switch is turned off, the cooling fans will continue to operate for a maximum of 3 minutes after the engine is stopped. This is performed to ensure restartability.
    1. The intelligent tester indicates a very high coolant temperature.
    2. The intelligent tester indicates a high outside air temperature.