CAN Communication System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

NOTICE:
* Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
* After the ignition switch is turned off, check that the key reminder warning system is not in operation.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
* Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1. CAN JUNCTION CONNECTOR





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2. DLC3





(a) Turn the ignition switch off.

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

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Standard Resistance





3. BRAKE ACTUATOR (SKID CONTROL ECU)





(a) Turn the ignition switch off.

(b) Disconnect the A4 skid control ECU connector.

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

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Standard Resistance





4. ECM





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(a) Turn the ignition switch off.

(b) Disconnect the E78, E77 and B50 ECM connectors.

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

Standard Resistance





5. YAW RATE SENSOR





(a) Turn the ignition switch off.

(b) Disconnect the E81 yaw rate sensor connector.

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

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Standard Resistance





6. STEERING ANGLE SENSOR





(a) Turn the ignition switch off.

(b) Disconnect the E16 steering angle sensor connector.

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

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Standard Resistance





7. COMBINATION METER ECU





(a) Turn the ignition switch off.

(b) Disconnect the E13 and E14 combination meter ECU connectors.

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

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Standard Resistance





8. CENTER AIRBAG SENSOR ASSEMBLY





(a) Turn the ignition switch off.

(b) Disconnect the E29 center airbag sensor assembly.

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

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Standard Resistance