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Home >> Toyota >> 2014 >> RAV4 EV >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Diagnostic Codes (Chg_F076 - U0424-537) & Circuit Tests)) (Electric) >> Hybrid Control System >> DTC P31CE-353: Contactor Cut OFF Relay Stuck ON [09/2013 - ] >> Inspection Procedure

Inspection Procedure

WARNING:
  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the electric vehicle traction motor assembly (inverter), DC/DC converter assembly, electric vehicle battery assembly or electric vehicle charger assembly, take safety precautions such as wearing insulated gloves and protective goggles, and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, attach a note to it to prevent other technicians from mistakenly reconnecting it while you are working on the high-voltage system. Refer to PRECAUTION [09/2013 - ] .
  • After removing the service plug grip, wait for at least 10 minutes, and then check the voltage at the terminals in the inspection point in the electric vehicle battery 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 electric vehicle traction motor assembly (inverter), DC/DC converter assembly, electric vehicle battery assembly and electric vehicle charger assembly.

NOTE:

After turning the 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. Refer to PRECAUTION [09/2013 - ] .

HINT: 

If the auxiliary battery voltage is applied to terminal CNTB of the battery control ECU, even though the power switch is off, the circuit is shorted to +B.