Multiplex Communication System (Diagnostic Codes): Overview Toyota Avalon XX30 рестайлинг 2

DESCRIPTION

1. This DTC is detected when communication between the body ECU and the gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the certification ECU and gateway ECU stops for more than 10 seconds.

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1. This DTC is detected when communication between the passenger side outer mirror ECU (memory mirror ECU) and gateway ECU stops for more than 10 seconds.

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1. This DTC is detected when communication between the driver side outer mirror ECU (memory mirror ECU) and gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the power source control ECU and gateway ECU stops for more than 10 seconds.

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1. DTC B1214 is detected when the door system communication circuit and +B battery are shorted. DTC B1215 is detected when the communication circuit and body ground are shorted. When this condition is detected, the door system communication bus (BEAN) will be disabled and some diagnosis codes will be output.

HINT

*1: w/ Smart key system

*2: w/ Driving position memory

*3: w/ Engine immobilizer w/ alarm

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1. CHECK DIAGNOSTIC TROUBLE CODE (A ECU) Disconnect the A ECU connector and check for DTCs B1214 and B1215. OK Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: The A ECU represents the A/C ECU. If any of the stated DTCs are not output, the disconnected A ECU (A/C ECU) is malfunctioning. NG --> See step 2 OK --> REPLACE A ECU
2. CHECK DIAGNOSTIC TROUBLE CODE (B ECU) Disconnect the A ECU and B ECU connectors and check for DTCs B1214 and B1215. OK Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: Remove the B ECUs in the following order: Power source ECU Certification ECU Combination switch ECU Body ECU Option connector Front controller Rain sensor Front controller Power seat ECU Memory mirror ECU (LH) Memory mirror ECU (RH) If any of the stated DTCs are not output, the disconnected B ECU (one of the ECUs from the above list) or the wire harness between the A ECU and B ECU is malfunctioning. After the DTC is cleared, proceed to 3 the next step. NG --> See step 4 OK: Go to next step
3. CHECK WIRE HARNESS BETWEEN A ECU AND B ECU Connect the A ECU connector. Disconnect the B ECU connectors and check for DTCs B1214 and B1215. OK Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: If any of the stated DTCs are not output, the wire harness between the A ECU and B ECU is functioning normally but the disconnected B ECU is malfunctioning. NG --> REPAIR OR REPLACE WIRE HARNESS BETWEEN A ECU AND B ECU OK --> REPLACE B ECU
4. CHECK DIAGNOSTIC TROUBLE CODE (C ECU) Connect the A ECU connector. Disconnect the B ECU and C ECU connectors and check for DTCs B1214 and B1215. OK Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: The C ECU represents the combination meter ECU. If any of the stated DTCs are not output, the disconnected C ECU (combination meter ECU) or the wire harness between the B ECU and C ECU is malfunctioning. NG --> See step 6 OK: Go to next step
5. CHECK WIRE HARNESS BETWEEN B ECU AND C ECU Connect the B ECU connector. Disconnect the C ECU connector and check for DTCs B1214 and B1215. OK Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: If any of the stated DTCs are not output, the wire harness between the B ECU and C ECU is functioning normally but the disconnected C ECU is malfunctioning. NG --> REPAIR OR REPLACE WIRE HARNESS BETWEEN B ECU AND C ECU OK --> REPLACE C ECU
6. CHECK WIRE HARNESS BETWEEN GATEWAY ECU AND A ECU OR C ECU Check for a short-circuit in B+ or body ground. Disconnect the A ECU, C ECU and gateway ECU connectors. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition A ECU connector / gateway ECU connector - Body ground Always 0 V C ECU connector / gateway ECU connector - Body ground 0 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition A ECU connector / gateway ECU connector - Body ground Always 10 kohms or higher C ECU connector / gateway ECU connector - Body ground 10 kohms or higher HINT: The A ECU represents the A/C ECU. The C ECU represents the combination meter ECU. NG --> REPAIR OR REPLACE WIRE HARNESS BETWEEN GATEWAY ECU AND A ECU OR C ECU OK --> REPLACE MULTIPLEX NETWORK GATEWAY ECU

This DTC is indicated when open or ground short of the GSW terminal is detected.

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This DTC is detected when communication between the AVC-LAN (radio receiver assembly or multi-display assembly) and multiplex network gateway ECU stops for more than 10 seconds.

1. This DTC is detected when communication between the A/C control (A/C ECU) and gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the combination meter (combination meter ECU) and gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the power seat ECU and gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the BEAN bus buffer and the gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the combination switch (combination switch ECU) and gateway ECU stops for more than 10 seconds.

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This DTC is detected when communication between the rain sensor and overhead J/B stops for more than 10 seconds.

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This DTC is detected when communication between the front controller and gateway ECU stops for more than 10 seconds.

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