Components COMPONENTS ILLUSTRATION 
Inspection INSPECTION PROCEDURE 1. INSPECT COURTESY LIGHT ASSEMBLY 
(a) Apply auxiliary battery voltage to the courtesy light assembly and check that the light illuminates. OK:
If the result is not as specified, replace the bulb or courtesy light assembly. Installation INSTALLATION CAUTION / NOTICE / HINT HINT:
PROCEDURE 1. INSTALL COURTESY LIGHT BULB (a) Install the courtesy light bulb to the courtesy light housing as shown in the illustration. 
(b) Install the courtesy light cover to the courtesy light housing as shown in the illustration. 
(c) Engage the claw to install the courtesy light housing with the courtesy light cover as shown in the illustration. 
2. INSTALL COURTESY LIGHT ASSEMBLY (a) Connect the connector.
Removal REMOVAL CAUTION / NOTICE / HINT HINT:
PROCEDURE 1. REMOVE COURTESY LIGHT ASSEMBLY
(b) Disconnect the connector to remove the courtesy light assembly. 2. REMOVE COURTESY LIGHT BULB (a) Using a screwdriver with its tip wrapped with protective tape, disengage the claw and remove the courtesy light housing with the courtesy light cover as shown in the illustration. 
(b) Remove the courtesy light cover from the courtesy light housing as shown in the illustration. 
(c) Remove the courtesy light bulb from the courtesy light housing as shown in the illustration. 
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Automatic Transaxle System: Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) When troubleshooting On-Board Diagnostic (OBD II) vehicles, an OBD II scan tool (complying with SAE J1987) must be connected to the vehicle. Various data output from the vehicle ECM can then be read. (b) OBD II regulations require that the vehicle on-board computer i ...
