Hybrid Battery System

HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: PRECAUTION

NOTICE:
When the negative (-) battery terminal has been disconnected, initialize the following systems after the terminal is reconnected.





1. PRECAUTIONS FOR INSPECTING THE HYBRID CONTROL SYSTEM

(a) 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:
Turning the power switch on (READY) with the service plug grip removed could cause a malfunction. Do not turn the power switch on (READY) unless instructed by the repair manual.

(b) After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.





HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

(c) Turn the power switch off, wear insulated gloves, and disconnect the negative terminal of the auxiliary battery before touching any of the orange-colored wires of the high-voltage system.

(d) Turn the power switch off before performing any resistance checks.

(e) Turn the power switch off before disconnecting or reconnecting any connectors.

2. PRECAUTIONS FOR HYBRID CONTROL SYSTEM ACTIVATION

(a) 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 turn the power switch on (READY).

3. REMOVAL AND INSTALLATION OF HYBRID VEHICLE CONTROL ECU

NOTICE:
When removing and installing the hybrid vehicle control ECU and ECM, be sure to distinguish the wire harnesses of the hybrid vehicle control ECU and ECM. If the wire harnesses are incorrectly connected, damage may occur to the engine.