DESCRIPTION If the radio and display receiver assembly cannot detect the DCM (telematics transceiver) for a certain period of time (90 seconds) after the engine switch is turned on (ACC) and the radio and display receiver assembly confirms that the information is missing by checking past DCM (telematics transceiver) recognition information (registered information), this DTC will be stored. The telematics system uses USB communication between devices. If an open, short, short to +B or short to ground occurs in the USB circuit, communication is interrupted and the telematics system will not operate normally.
HINT: This DTC may be stored due to environmental reasons such as electrical noise or interference. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Clear the DTCs. Body Electrical > Navigation System > Clear DTCs(b) Turn the engine switch off. (c) Turn the engine switch on (IG) and wait for 90 seconds. (d) Recheck for DTCs and check that no DTCs are output. Body Electrical > Navigation System > Trouble CodesOK: No DTCs are output.
(a) Disconnect the G9 DCM (telematics transceiver) connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Disconnect the G1 radio and display receiver assembly connector. (b) Disconnect the G11 DCM (telematics transceiver) connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the G1 radio and display receiver assembly connector.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Disconnect the G11 DCM (telematics transceiver) connector. (b) Disconnect the G113 navigation ECU connector.
(a) Replace the DCM (telematics transceiver) with a new one. Click here (b) Clear the DTCs. Body Electrical > Navigation System > Clear DTCs(c) Turn the engine switch off. (d) Turn the engine switch on (IG) and wait for 90 seconds. (e) Recheck for DTCs and check that no DTCs are output. Body Electrical > Navigation System > Trouble CodesOK: No DTCs are output.
(a) Replace the navigation ECU with a new one. Click here (b) Clear the DTCs. Body Electrical > Navigation System > Clear DTCs(c) Turn the engine switch off. (d) Turn the engine switch on (IG) and wait for 90 seconds. (e) Recheck for DTCs and check that no DTCs are output. Body Electrical > Navigation System > Trouble CodesOK: No DTCs are output.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Motor Generator Control System: Lost Communication With ECM/PCM "A" Missing Message (U010087,U029387,U117087)
DESCRIPTION The motor generator control ECU communicates with the hybrid vehicle control ECU, ECM and skid control ECU assembly via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate U010087 Lost Communication With ECM/PCM "A" Missing Message A CAN co ...