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
(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
HINT
- The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.
- Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.
(a) Check the CAN No. 5 junction connectors.
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. CAN NO. 8 JUNCTION CONNECTOR
(a) Check the CAN No. 8 junction connector.
Text in Illustration
(b) Check the connection diagram of the components which are connected to the CAN No. 8 junction connector.
9. CAN NO. 9 JUNCTION CONNECTOR
(a) Check the CAN No. 9 junction connector.
Text in Illustration
(b) Check the connection diagram of the components which are connected to the CAN No. 9 junction connector.
10. CAN NO. 10 JUNCTION CONNECTOR
HINT
- The connectors connected to the CAN junction connectors can be distinguished according to the color of the communication bus wires.
- Reconnecting the connectors to non-specified positions on the CAN junction connectors does not affect system operation. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.
(a) Check the CAN No. 10 junction connectors.
Text in Illustration
(b) Check the connection diagram of the components which are connected to the CAN No. 10 junction connector.
11. DLC3
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
Standard Resistance:
12. ECM
(a) Disconnect the connector of the ECM.
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 Power Management Bus Main Wire
13. 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
14. COMBINATION METER
(a) Disconnect the connector of the combination meter.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
15. POWER STEERING ECU
(a) Disconnect the connectors of the power steering ECU.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
16. AIR CONDITIONING AMPLIFIER
(a) Disconnect the connector of the air conditioning amplifier.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
17. CENTER AIRBAG SENSOR ASSEMBLY
(a) Disconnect the connector of the center airbag sensor assembly.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
18. SKID CONTROL ECU
(a) Disconnect the connector of the skid control ECU.
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 Power Management Bus Branch Wire
for CAN No. 3 Bus Branch Wire
19. STEERING ANGLE SENSOR
(a) Disconnect the connector of the steering angle sensor.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
