Components COMPONENTS ILLUSTRATION 
Installation INSTALLATION PROCEDURE 1. INSTALL BACK-UP BATTERY (a) Install the back-up battery shown in the illustration. 
NOTICE: Make sure that the back-up battery is securely installed. (b) Connect the connector. NOTICE: Make sure that the connector is connected securely. (c) Engage the 2 claws to install the battery cover as shown in the illustration. 
NOTICE: Make sure that the battery cover is securely installed. 2. INSTALL DCM (TELEMATICS TRANSCEIVER) Click here 3. PERFORM INITIALIZATION for Gasoline Model: Click here for HV Model: Click here
Removal 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 back-up battery removal/installation are shown below. Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)
PROCEDURE 1. REMOVE DCM (TELEMATICS TRANSCEIVER) Click here
2. REMOVE BACK-UP BATTERY (a) Disengage the 2 claws and remove the battery cover as shown in the illustration. 
(b) Disconnect the connector and remove the back-up battery as shown in the illustration. 
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Toyota Avalon Service & Repair Manual > Air Fuel Ratio Sensor: Inspection
INSPECTION PROCEDURE 1. INSPECT AIR FUEL RATIO SENSOR (for Bank 1) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 Ω 1 (HA1A) - 4 (A1A-) Always 10 kΩ or higher I ...
