Can Communication System (For Rhd) Main Body Ecu Communication Stop Mode

Communication System. Camry. Acv40 Gsv40
Can Communication. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN BUS LINE FOR DISCONNECTION (MAIN BODY ECU BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (BECU, IG, GND1)

CAN COMMUNICATION SYSTEM (for RHD) - Main Body ECU Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
Main Body ECU Communication Stop Mode
  1. "Integrated J/B" not displayed on "Communication Bus Check" screen of the intelligent tester
  2. Applies to "Main Body ECU Communication Stop Mode" in "DTC combination table"
  1. Power source circuit of the main body ECU
  2. Main body ECU branch wire or connector
  3. Main body ECU

WIRING DIAGRAM


Camry. Acv40 Gsv40.Can Communication.Can Communication System (For Lhd).Can Communication System (For Rhd) Main Body Ecu Communication Stop Mode


INSPECTION PROCEDURE

NOTICE:
  1. Turn the ignition switch off before measuring the resistance of the CAN main wire and CAN branch wires.
  2. After the ignition switch is turned off, check that the key reminder warning system and lighting system are not operating.
  3. 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 other switches or any triggers related ECU and sensor communication on the CAN, which would cause resistance reading variations.
1.CHECK CAN BUS LINE FOR DISCONNECTION (MAIN BODY ECU BRANCH WIRE)


    Camry. Acv40 Gsv40.Can Communication.Can Communication System (For Lhd).Can Communication System (For Rhd) Main Body Ecu Communication Stop Mode

  1. Turn the ignition switch off.

  1. Disconnect the main body ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E8-5 (CANH) - E8-6 (CANL)
    		Ignition switch off
    		54 to 69 Ω


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CAN-H, CAN-L)
OK


2.CHECK HARNESS AND CONNECTOR (BECU, IG, GND1)


    Camry. Acv40 Gsv40.Can Communication.Can Communication System (For Lhd).Can Communication System (For Rhd) Main Body Ecu Communication Stop Mode

  1. Disconnect the 1F J/B connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1F-10 (GND1) - Body ground
    		Always
    		Below 1 Ω

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1F-1 (BECU) - Body ground
    		Always
    		10 to 14 V
    1F-11 (IG) - Body ground
    		Ignition switch on
    		10 to 14 V

  1. Reconnect the main body ECU connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU