Part 1

NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

NOTICE:
* After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Service Precautions.
* Turn the ignition switch off before measuring the resistances between CAN main bus lines and between CAN branch lines.
* Turn the ignition switch off before inspecting CAN bus lines for a ground short.
* Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
* This section describes the standard values for all CAN related components.

HINT
* Operating the ignition 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.

HINT
Connectors that connect to the CAN junction connector can be distinguished by color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. 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.

(1) Connection diagram

Text in Illustration

* *1: for 2AR-FE w/ Wireless door lock system

* *2: for 2AR-FE w/o Wireless door lock system

* *3: for 2GR-FE w/ Wireless door lock system

* *4: Separate type yaw rate sensor

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

* *1: for 2AR-FE w/ Wireless door lock system

* *2: for 2AR-FE w/o Wireless door lock system

* *3: for 2GR-FE w/ Wireless door lock system

* *4: Separate type yaw rate sensor

2. CAN NO. 2 JUNCTION CONNECTOR

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

HINT
Connectors that connect to the CAN junction connector can be distinguished by color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. 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.

(1) Connection diagram

Text in Illustration

* *1: w/ Intuitive parking assist system

* *2: w/ Smart key system

* *3: w/ Blind spot monitor system

* *4: for Navigation receiver type (for navigation receiver type)

* *5: for Navigation receiver type (for radio and display type w/ intuitive parking assist system)

* *6: for Radio and display type (for radio and display type w/o intuitive parking assist system)

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

* *1: w/ Intuitive parking assist system

* *2: w/ Smart key system

* *3: w/ Blind spot monitor system

* *4: for Navigation receiver type (for navigation receiver type)

* *5: for Navigation receiver type (for radio and display type w/ intuitive parking assist system)

* *6: for Radio and display type (for radio and display type w/o intuitive parking assist system)

3. CAN NO. 3 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)

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

(1) Connection diagram

Text in Illustration

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

4. CAN NO. 4 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)

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

(1) Connection diagram

Text in Illustration

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

5. CAN NO. 5 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)

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

(1) Connection diagram

Text in Illustration

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

6. DLC3

(a) Disconnect the cable from the negative (-) battery terminal.

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

Standard Resistance:

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7. ECM (for 2GR-FE)

Text in Illustration

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the ECM connectors.

Text in Illustration

8. ECM (for 2AR-FE)

Text in Illustration

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the ECM connectors.

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9. COMBINATION METER ASSEMBLY

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(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the combination meter assembly connector.

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10. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Text in Illustration

(a) Disconnect the cable from the negative (-) battery terminal.

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

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11. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

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(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the brake actuator assembly (skid control ECU) connector.

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12. STEERING SENSOR

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(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the steering sensor connector.

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

Standard Resistance:

13. YAW RATE SENSOR (SEPARATE TYPE YAW RATE SENSOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the connector of the yaw rate sensor.

Text in Illustration