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DTC    U0293    Lost Communication with HV ECU

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DESCRIPTION

This DTC is stored when the power management control ECU detects a CAN communication error inside the power management control ECU (power control section - HV control section).

DTC No.
DTC Detection Condition
Trouble Area
U0293
CAN communication signal error inside the power management control ECU (power control section - HV control section).
  1. Power management control ECU

WIRING DIAGRAM


B230209E04


INSPECTION PROCEDURE

NOTICE:
When the power management control ECU is replaced with a new one and the cable from the negative (-) auxiliary battery terminal is connected, the power source mode becomes on (IG) mode. When the auxiliary battery is removed and reinstalled, the power source mode that was selected when the auxiliary battery was removed is reinstalled.

1.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)

  1. Disconnect the L5 and L6 connectors from the power management control ECU.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L5-1 (AM22) - Body ground
    		Always
    		9.5 to 16 V
    L6-7 (AM21) - Body ground
    		Always
    		9.5 to 16 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)
OK


2.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		 Specified Condition
    L5-5 (E01) - Body ground
    		Always
    		Below 1 Ω
    L5-6 (E1) - Body ground
    		Always
    		Below 1 Ω
    L6-4 (E12) - Body ground
    		Always
    		Below 1 Ω
    L6-5 (E02) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)
OK


3.CHECK FOR DTC

  1. Clear the DTC (Click here).

  1. Check for DTC again.

    OK:
    DTC U0293 is not output



NG
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)