Dtc B1207 Certification Ecu Communication Malfunction

Communication System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Can Communication. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK CAN BUS LINE FOR DISCONNECTION (CERTIFICATION ECU BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)

DTC B1207 Certification ECU Communication Malfunction


DESCRIPTION


DTC Code
DTC Detection Condition
Trouble Area
B1207
There is no communication from the certification ECU.
  1. Power source circuit of certification ECU
  2. Certification ECU branch wire or connector
  3. Certification ECU
HINT:
For vehicles with an entry and start system only.

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B1207 Certification Ecu Communication Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. Turn the ignition switch off before measuring the resistance of the main wire and the branch wire.
  2. After the ignition switch is turned off, check that the key reminder warning system and light reminder buzzer are not in operation.
  3. Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or 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 DTC

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Clear the DTC.

  1. Check for DTC.

    Result
    Result
    		Proceed to
    DTC is not output.
    		A
    DTC is output.
    		B


B
Go to ENTRY AND START SYSTEM
A


2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the main wire and the branch wire.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
    NOTICE:
    1. w/ Navigation System (for HDD):
      After the ignition switch is turned off, the HDD navigation system requires approximately a minute to record various types of memory and settings. As a result, after turning the ignition switch off, wait a minute or more before disconnecting the cable from the negative (-) battery terminal.
    2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

NEXT


3.CHECK CAN BUS LINE FOR DISCONNECTION (CERTIFICATION ECU BRANCH WIRE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B1207 Certification Ecu Communication Malfunction

  1. Disconnect the E63 certification ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E63-27 (CANH) - E63-28 (CANL)
    		Ignition switch off
    		54 to 69 Ω


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CERTIFICATION ECU (CANH, CANL)
OK


4.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)

  1. Connect the cable to the negative (-) battery terminal.

    NOTICE:
    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B1207 Certification Ecu Communication Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E63-17 (E) - 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
    E63-1 (+B) - Body ground
    		Always
    		11 to 14 V
    E63-18 (IG) - Body ground
    		Ignition switch on (IG)
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE CERTIFICATION ECU