REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during DCM (telematics transceiver) removal/installation are shown below. Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)
PROCEDURE 1. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL LH Click here
2. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL RH Click here 3. REMOVE FRONT CONSOLE UPPER PANEL GARNISH Click here 4. REMOVE CONSOLE BOX POCKET SUB-ASSEMBLY Click here 5. REMOVE CENTER INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY Click here 6. REMOVE CENTER NO. 1 INSTRUMENT CLUSTER FINISH PANEL Click here 7. REMOVE CENTER NO. 2 INSTRUMENT CLUSTER FINISH PANEL Click here 8. REMOVE RADIO AND DISPLAY RECEIVER ASSEMBLY WITH BRACKET Click here 9. REMOVE NO. 2 HEATER TO REGISTER DUCT SUB-ASSEMBLY Click here 10. REMOVE DCM (TELEMATICS TRANSCEIVER) WITH BRACKET (a) w/o Navigation System:
(2) Remove the 2 nuts and pull the DCM (telematics transceiver) with bracket as shown in the illustration. 
(3) Disconnect each connector and remove the DCM (telematics transceiver) with bracket. (b) w/ Navigation System:
(2) Remove the 2 nuts and pull the DCM (telematics transceiver) with bracket as shown in the illustration. 
(3) Disconnect each connector and remove the DCM (telematics transceiver) with bracket. 11. REMOVE TELEPHONE AND GPS ANTENNA CORD Click here
12. REMOVE NO. 2 TELEPHONE BRACKET (a) w/o Navigation System:
(b) w/ Navigation System:
13. REMOVE NO. 1 TELEPHONE BRACKET (a) w/o Navigation System:
(b) w/ Navigation System:
14. REMOVE NAVIGATION ECU WITH ANTENNA CORD (w/ Navigation System) 15. REMOVE DCM (TELEMATICS TRANSCEIVER) ASSEMBLY 16. REMOVE NO. 3 TELEPHONE BRACKET (a) Disengage the 3 claws and remove the No. 3 telephone bracket as shown in the illustration. 
17. REMOVE DCM (TELEMATICS TRANSCEIVER) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Lane Departure Alert System (w/ Steering Control)(for Gasoline Model): Driving Support ECU Receive Data Malfunction (C1A73)
DESCRIPTION If a communication error between the driving support ECU assembly and another ECU is detected, DTC C1A73 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A73 Driving Support ECU Receive Data Malfunction 2 seconds after the engine switch is turned on (IG), a commun ...
