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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (2GR-FXE) - Diagnostic Codes (4 Of 7) >> Hybrid Control System >> DTC P0A79-716: Drive Motor "B" Inverter Performance [02/2014 - 11/2016] >> Caution / Notice / Hint

Caution / Notice / Hint

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

    Refer to PRECAUTION [02/2014 - 11/2016]

    HINT: 

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter 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 [02/2014 - 11/2016]

  • DTC P0A79-716 is stored after DTC P0A79-692, 693, 694, 695, 696 and/or 712 is stored. After troubleshooting and repairing the malfunction which caused DTC P0A79-716 to be stored, be sure to troubleshoot all the other DTCs.
  • Depending on the conditions in which the vehicle is being operated when a short circuit occurs in the inverter with converter assembly, the No. 6 floor wire (rear motor cable), extension wire assembly, or rear traction motor with transaxle assembly may be affected. As this DTC is stored if a short circuit occurs in the inverter with converter assembly, perform a road test to check the No. 6 floor wire (rear motor cable), extension wire assembly, and rear traction motor with transaxle assembly. If problems are found, replace the malfunctioning parts.
  • After completing the repair, including the repair of malfunctions which caused previously output DTCs, drive the vehicle at a speed of approximately 40 km/h (25 mph) for 1 minute and check that DTC P0A91-705 (Drive Motor "B" Performance) is not output. If DTC P0A91-705 (Drive Motor "B" Performance) is output, replace the rear traction motor with transaxle assembly.

HINT: 

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. With the engine stopped, the power switch on (READY) and shift lever in P, depress the accelerator pedal to start the engine.
  2. Perform a road test according to the freeze frame data item "Vehicle Spd" for approximately 10 minutes.
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