Dtc B2326 Can Ms Bus Line 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 CAN BUS LINE (MAIN WIRE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

CHECK CAN MAIN WIRE FOR DISCONNECTION (NO. 4 JUNCTION CONNECTOR)

CHECK CAN MAIN WIRE FOR DISCONNECTION (COMBINATION METER ECU)

CHECK CAN MAIN WIRE FOR DISCONNECTION (MAIN BODY ECU)

CHECK CAN BUS LINE FOR SHORT

CHECK CAN BUS LINE FOR SHORT

CHECK CAN BUS LINE FOR SHORT

CHECK CAN BUS LINE FOR SHORT

CHECK CAN BUS LINE FOR SHORT

CHECK CAN BUS LINE FOR DISCONNECTION

DTC B2326 CAN MS Bus Line Communication Malfunction


DESCRIPTION


DTC Code
DTC Detection Condition
Trouble Area
B2326
Lost Communication with the main body ECU.
  1. CAN No. 2 bus circuit
  2. Certification ECU branch wire or connector
  3. Main body ECU main wire or connector
  4. Combination meter ECU main wire or connector
  5. Main body ECU
  6. Combination meter ECU
  7. Certification ECU
  8. No. 4 junction connector
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 B2326 Can Ms Bus Line Communication Malfunction


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line 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 CAN BUS LINE (MAIN WIRE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Remove the main body ECU with the connector connected.

  1. Disconnect the IB and IE main body ECU connectors.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    		Resistance of Malfunction
    E19-11 (CANP) - E19-12 (CANN)
    		Ignition switch off
    		54 to 69 Ω
    		Below 53 Ω: Short in line
    Higher than 69 Ω or higher: Open in CAN main bus line
    E19-11 (CANP) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    		Below 6 kΩ: +B short
    E19-12 (CANN) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    		Below 6 kΩ: +B short
    E19-11 (CANP) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    		Below 200 Ω: Ground short
    E19-12 (CANN) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    		Below 200 Ω: Ground short
    Result
    Result
    		Proceed to
    NG
    - Open in CAN main bus line
    		A
    NG
    - Short in line
    - +B short
    - Ground short
    		B
    OK
    		C


B
Go to step 5

C
Go to step 10
A


2.CHECK CAN MAIN WIRE FOR DISCONNECTION (NO. 4 JUNCTION CONNECTOR)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Disconnect the E76 junction connector (No. 4 junction connector).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    		Inspection Area
    E76-9 (MSCH) - E76-20 (MSCL)
    		Ignition switch off
    		108 to 132 Ω
    		Combination meter side CAN main wire
    E76-11 (CANP) - E76- 22 (CANN)
    		Ignition switch off
    		108 to 132 Ω
    		Main body ECU side CAN main wire
    Result
    Result
    		Proceed to
    NG (Combination meter side CAN main wire)
    		A
    NG (Main body ECU side CAN main wire)
    		B
    OK
    		C


B
Go to step 4

C
REPAIR OR REPLACE NO. 4 JUNCTION CONNECTOR
A


3.CHECK CAN MAIN WIRE FOR DISCONNECTION (COMBINATION METER ECU)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Disconnect the E76 junction connector (No. 4 junction connector).

  1. Remove the combination meter ECU with the connector connected.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E22-9 (MSCH) - E22-10 (MSCL)
    		Ignition switch off
    		108 to 132 Ω


NG
REPLACE COMBINATION METER ECU
OK

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR

4.CHECK CAN MAIN WIRE FOR DISCONNECTION (MAIN BODY ECU)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Disconnect the E76 junction connector.

  1. Remove the main body ECU with the connector connected.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E19-11 (CANP) - E19-12 (CANN)
    		Ignition switch off
    		108 to 132 Ω


G
REPLACE MAIN BODY ECU
OK

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR

5.CHECK CAN BUS LINE FOR SHORT

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Remove the main body ECU with the connector connected.

  1. Disconnect the IB and IE main body ECU connectors.

  1. Disconnect the E22 combination meter ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E19-11 (CANP) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-12 (CANN) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-11 (CANP) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-12 (CANN) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-11 (CANP) - E19-12 (CANN)
    		Ignition switch off
    		108 to 132 Ω

  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
    E19-11 (CANP) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-12 (CANN) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-11 (CANP) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-12 (CANN) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-11 (CANP) - E19-12 (CANN)
    		Ignition switch off
    		108 to 132 Ω
    Result
    Result
    		Proceed to
    NG
    		A
    OK (Combination meter ECU)
    		B
    OK (Certification ECU)
    		C


B
REPLACE COMBINATION METER ECU

C
REPLACE CERTIFICATION ECU
A


6.CHECK CAN BUS LINE FOR SHORT

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Remove the main body ECU with the connector connected.

  1. Disconnect the IE and IB main body ECU connectors.

  1. Disconnect the E76 junction connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E19-11 (CANP) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-12 (CANN) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-11 (CANP) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-12 (CANN) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-11 (CANP) - E19-12 (CANN)
    		Ignition switch off
    		108 to 132 Ω


OK
Go to step 8
NG


7.CHECK CAN BUS LINE FOR SHORT

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Disconnect the E19 ECU connector.

  1. Disconnect the IB and IE main body ECU connectors.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E19-11 (CANP) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-12 (CANN) - IB-30 (BECU)
    		Ignition switch off
    		6 kΩ or higher
    E19-11 (CANP) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-12 (CANN) - IE-17 (GND1)
    		Ignition switch off
    		200 Ω or higher
    E19-11 (CANP) - E19-12 (CANN)
    		Ignition switch off
    		108 to 132 Ω


NG
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR
OK

REPLACE MAIN BODY ECU

8.CHECK CAN BUS LINE FOR SHORT

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Disconnect the E76 junction connector.

  1. Disconnect the E22 combination meter ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E22-9 (CANP) - E22-10 (CANN)
    		Ignition switch off
    		108 to 132 Ω
    E22-9 (CANP) - E22-22 (B)
    		Ignition switch off
    		6 kΩ or higher
    E22-10 (CANN) - E22-22 (B)
    		Ignition switch off
    		6 kΩ or higher
    E22-9 (CANP) - E22-33 (ET)
    		Ignition switch off
    		200 Ω or higher
    E22-10 (CANN) - E22-33 (ET)
    		Ignition switch off
    		200 Ω or higher
    Result
    Result
    		Proceed to
    OK
    w/ Entry and start system
    		A
    OK
    w/o Entry and start system
    		B
    NG
    		C


B
REPLACE COMBINATION METER ECU

C
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR
A


9.CHECK CAN BUS LINE FOR SHORT

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Can Communication.Can Communication System. Dtc B2326 Can Ms Bus Line Communication Malfunction

  1. Disconnect the E76 junction connector.

  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
    E63-27 (CANH) - E63-1 (+B1)
    		Ignition switch off
    		6 kΩ or higher
    E63-28 (CANL) - E63-1 (+B1)
    		Ignition switch off
    		6 kΩ or higher
    E63-27 (CANH) - E63-17 (E)
    		Ignition switch off
    		200 Ω or higher
    E63-28 (CANL) - E63-17 (E)
    		Ignition switch off
    		200 Ω or higher


NG
REPLACE CERTIFICATION ECU OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE CERTIFICATION ECU

10.CHECK CAN BUS LINE FOR DISCONNECTION

  1. Recheck for DTC.


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