DESCRIPTION If the DCM (Telematics Transceiver) detects an error in communication between the DCM (Telematics Transceiver) and the airbag ECU assembly as a result of the DCM (Telematics Transceiver) self check, this DTC will be set.
WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT NOTICE: The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution in the SRS. Click here
PROCEDURE
(a) Turn the power switch off. (b) Connect the Techstream to the DLC3. (c) Turn the power switch on (IG) and wait for 10 seconds. (d) Turn the Techstream on. (e) Clear the DTCs. Body Electrical > SRS Airbag > Clear DTCs(f) Recheck for DTCs. Body Electrical > SRS Airbag > Trouble Codes
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
Reference Waveform:
(a) Remove the airbag ECU assembly but do not disconnect the connectors. Click here
(a) Disconnect the G9 DCM (Telematics Transceiver) connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Replace the DCM (Telematics Transceiver). Click here NOTICE:
(a) Disconnect the G9 DCM (Telematics Transceiver) connector. (b) Disconnect the G50 airbag ECU assembly connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Tire Pressure Warning System(for Hv Model): Tire Pressure Monitor Receiver Communication Stop (B1247)
DESCRIPTION The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver communicate by direct line. If a malfunction occurs in this communication signal, B1247 is output by the main body ECU (multiplex network body ECU). DTC No. Detection Item DTC Detection Condition Tr ...