Part 1

NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

NOTICE:
* Turn the power switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
* Turn the power switch off before inspecting CAN bus wires for a ground short.
* After the power switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
* This section describes the standard CAN values for all CAN related components.

HINT
* Operating the power switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
* Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

1. CAN NO. 1 JUNCTION CONNECTOR (for CAN No. 1 Bus)

(a) Check the CAN No. 1 junction connector (Instrument panel connector holder upper side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN No. 1 junction connector.





(b) Check the CAN No. 1 junction connector (Instrument panel connector holder lower side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN No. 1 junction connector.





2. CAN JUNCTION CONNECTOR LH (for CAN No. 1 Bus)

(a) Check the CAN junction connector LH (Instrument panel wire side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN junction connector LH.





(b) Check the CAN junction connector LH (Engine room main wire side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN junction connector LH.





3. CAN JUNCTION CONNECTOR RH (for CAN No. 1 Bus and CAN No. 2 Bus)

(a) Check the CAN junction connector RH (Instrument panel wire side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN junction connector RH.

for CAN No. 1 Bus





for CAN No. 2 Bus





(b) Check the CAN junction connector RH (Engine room main wire side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN junction connector RH.

for CAN No. 1 Bus





for CAN No. 2 Bus





4. CAN NO. 2 JUNCTION CONNECTOR

(a) Check the CAN No. 2 junction connector (Instrument panel connector holder upper side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN No. 2 junction connector.





(b) Check the CAN No. 2 junction connector (Instrument panel connector holder lower side).

(1) Connection diagram





Text in Illustration





(2) Check the connection diagram of the components which are connected to the CAN No. 2 junction connector.





5. CAN NO. 3 JUNCTION CONNECTOR (for CAN MS Bus)

(a) Check the CAN No. 3 junction connector.

(1) Connection diagram





Text in Illustration





(b) Check the connection diagram of the components which are connected to the CAN No. 3 junction connector.

Junction Connector B Side





Junction Connector A Side





6. CAN NO. 4 JUNCTION CONNECTOR (for Driving Support Bus)

(a) Check the CAN No. 4 junction connector.

(1) Connection diagram





Text in Illustration





(b) Check the connection diagram of the components which are connected to the CAN No. 4 junction connector.





7. DLC3

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





Standard Resistance:





Text in Illustration





8. HYBRID VEHICLE CONTROL ECU





(a) Disconnect the hybrid vehicle control ECU connector.





Text in Illustration





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

Standard Resistance:

for CAN No. 1 Bus Main Wire





for CAN No. 2 Bus Main Wire





9. POWER MANAGEMENT CONTROL ECU





(a) CAN No. 1 Bus Branch Wire

(1) Disconnect the power management control ECU connector.





Text in Illustration





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

Standard Resistance:

for CAN No. 1 Bus Branch Wire





(b) CAN No. 2 Bus Main Wire

(1) Disconnect the power management control ECU connector.





Text in Illustration





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

Standard Resistance:

for CAN No. 2 Bus Main Wire





(c) Power Management Bus Main Wire

(1) Disconnect the power management control ECU connector.





Text in Illustration





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

Standard Resistance:

for Power Management Bus Main Wire





10. TRANSMISSION CONTROL ECU





(a) Disconnect the transmission control ECU connectors.





Text in Illustration





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

Standard Resistance:





11. BRAKE BOOSTER WITH MASTER CYLINDER (SKID CONTROL ECU)

(a) Disconnect the brake booster with master cylinder (skid control ECU) connector.





Text in Illustration





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

Standard Resistance:

CAN No. 1 Bus Branch Wire





CAN No. 2 Bus Branch Wire





12. AIRBAG SENSOR ASSEMBLY





(a) Disconnect the center airbag sensor assembly connector.





Text in Illustration





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

Standard Resistance:





13. MULTIPLEX NETWORK BODY ECU (MAIN BODY ECU)





(a) Disconnect the multiplex network body ECU (main body ECU) connectors.





Text in Illustration





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

Standard Resistance:

CAN No. 1 Bus Branch Wire





CAN MS Bus Main Wire





14. SMART KEY ECU (CERTIFICATION ECU)