CAN COMMUNICATION SYSTEM > Power Source Control ECU Communication Stop Mode

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DESCRIPTION


Detection Item
Symptom
Trouble Area
Power Management Control ECU Communication Stop Mode
  1. "Power Management" not displayed on "Communication Bus Check" screen of intelligent tester
  2. Applies to "Power Management Control ECU Communication Stop Mode" in "DTC combination table"
  1. Power source circuit of power source control ECU
  2. Power source control ECU branch wire or connector
  3. Power source control ECU

HINT:
For 1ND-TV engine.


WIRING DIAGRAM


E175995E04


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuit related to this system before performing the following inspection procedure.
  2. Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
  3. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  4. Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1.CHECK FOR OPEN IN CAN BUS WIRE (POWER SOURCE CONTROL ECU BRANCH WIRE)

  1. Turn the ignition switch off.



    E175990E05

  1. Disconnect the D73 power source control ECU connector.

  1. Measure the resistance according to the value in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D73-14 (CA1H) - D73-13 (CA1L)
    		Ignition switch off
    		54 to 69 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Power Source Control ECU)

  1. Reconnect the power source control ECU connector.



NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
OK


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


    E175990E06

  1. Disconnect the D73 power source control ECU connector.

  1. Measure the resistance according to the value in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D73-6 (GND) - Body ground
    		Always
    		Below 1 Ω
    D73-5 (GND2) - Body ground
    		Always
    		Below 1 Ω

  1. Measure the voltage according to the value in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D73-1 (AM22) - Body ground
    		Always
    		11 to 14 V
    D73-2 (AM21) - Body ground
    		Always
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Power Source Control ECU)

  1. Reconnect the power source control ECU connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER SOURCE CONTROL ECU (Click here)