Part 1

NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

NOTICE:
* Turn the engine switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
* Turn the engine switch off before inspecting CAN bus wires for a ground short.
* After the engine 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 engine 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 engine 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

(a) Check the CAN No. 1 junction connector.

Text in Illustration

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

2. CAN NO. 2 JUNCTION CONNECTOR

(a) Check the CAN No. 2 junction connector.

Text in Illustration

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

3. CAN NO. 3 JUNCTION CONNECTOR

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

Text in Illustration

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

4. CAN NO. 4 JUNCTION CONNECTOR

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

Text in Illustration

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

5. CAN NO. 5 JUNCTION CONNECTOR

(a) Check the CAN No. 5 junction connector.

Text in Illustration

(b) Check the connection diagram of the components which are connected to the CAN No. 5 junction connector.

6. CAN NO. 6 JUNCTION CONNECTOR

(a) Check the CAN No. 6 junction connector.

Text in Illustration

(b) Check the connection diagram of the components which are connected to the CAN No. 6 junction connector.

7. CAN NO. 7 JUNCTION CONNECTOR

(a) Check the CAN No. 7 junction connector.

Text in Illustration

(b) Check the connection diagram of the components which are connected to the CAN No. 7 junction connector.

8. DLC3

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

Standard Resistance:

Text in Illustration

9. ECM

(a) Disconnect the connectors of the ECM.

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

Standard Resistance:

for CAN No. 1 Bus Main Wire

for Power Management Bus Main Wire

10. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Disconnect the connectors of the main body ECU.

Text in Illustration

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

Standard Resistance:

for CAN No. 1 Bus Branch Wire
for CAN MS Bus Main Wire

11. COMBINATION METER

(a) Disconnect the connector of the combination meter.