Hybrid Control System

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: U0164-594,U0164-827: Lost Communication with A/C ECU
U0164-827 - Lost Communication with A/C ECU

DESCRIPTION

Since the air conditioning amplifier is connected to the CAN, signals sent to the hybrid vehicle control ECU.





INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Check for and record DTCs of all systems by following the prompts on the Techstream screen.

NEXT -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting