A25A-FXS (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION; 2019 - 2021 MY Avalon HV [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001AWFA
Model Year Start: 2019	Model: Avalon HV	Prod Date Range: [04/2018 - 08/2021]
Title: A25A-FXS (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION; 2019 - 2021 MY Avalon HV [04/2018 - 08/2021]

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced when inspecting auxiliary battery are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
Auxiliary battery terminal is disconnected/reconnected	Perform steering sensor zero point calibration	Lane Departure Alert System (w/ Steering Control)
		Pre-Collision System
		Intelligent Clearance Sonar System*
		Lighting system (for HV Model with Cornering Light)
	Memorize steering angle neutral point	Parking Assist Monitor System
	Memorize steering angle neutral point	Panoramic View Monitor System

*: When performing learning using the Techstream.

Click here

PROCEDURE

1. CHECK AUXILIARY BATTERY

(a) Check that the auxiliary battery cables are connected to the correct terminals.

If they are not, connect them properly.

(b) Check the auxiliary battery for damage and deformation. If severe damage, deformation or leakage is found, replace the auxiliary battery.

2. CHECK AUXILIARY BATTERY VOLTAGE

(a) Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.

(b) Measure the auxiliary battery voltage according to the value(s) in the table below.

Tester Connection	Condition	Specified Condition	Result
Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal	20°C (68°F), Power switch off	12.0 V or higher	Auxiliary battery is OK
	20°C (68°F), Power switch off	12.0 V or less	Recharge auxiliary battery

3. RECHARGE AUXILIARY BATTERY

(a) Recharge the auxiliary battery.

HINT:

Recharge the auxiliary battery according to the charger's instructions.
Apply the appropriate charging current according to the type of auxiliary battery shown in the table below.

Charge Method	Charging Current
Normal	Below 5 A
Quick	Below 15 A

(b) Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.

Tester Connection	Condition	Specified Condition	Result
Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal	20°C (68°F), Power switch off	12.0 V or higher	Auxiliary battery is OK
	20°C (68°F), Power switch off	12.0 V or less	Recharge auxiliary battery

4. CHECK AUXILIARY BATTERY TERMINAL, FUSIBLE LINK AND FUSE

(a) Check that the auxiliary battery terminals are not loose or corroded.

Torque:

Positive (+) Auxiliary Battery Terminal :

5.4 N·m {55 kgf·cm, 48 in·lbf}

Negative (-) Auxiliary Battery Terminal :

5.4 N·m {55 kgf·cm, 48 in·lbf}

If a terminal is loose or corroded, tighten or clean the terminal.

(b) Measure the resistance of each fusible link and fuse for the auxiliary battery charging system.

Standard Resistance:

Below 1 Ω

If the result is not as specified, replace the fusible link or fuse as necessary.

5. CHECK AMD TERMINAL

CAUTION:

Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair manual.
Click here
To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.

(a) Remove the service plug grip.

Click here

(b) Check that the AMD terminal is connected securely, and there is no contact problem.

If there are any arc marks, replace the affected parts.

Torque:

Inverter with Converter Assembly Side :

10 N·m {102 kgf·cm, 7 ft·lbf}

No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side :

8.0 N·m {82 kgf·cm, 71 in·lbf}

If there are no arc marks and the AMD terminal connection is faulty, connect the AMD terminal securely.

AMD Terminal

(Inverter with Converter Assembly Side)

AMD Terminal

(No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side)

(d) Install the service plug grip.

Click here

6. CHECK DC/DC CONVERTER FUNCTION

(a) Connect the AC/DC 400 A probe of the tester to the positive (+) auxiliary battery cable.

(b) Install the service plug grip.

(d) Turn the power switch on (READY) and leave the vehicle as it is until the electric current flowing to the auxiliary battery becomes 10 A or less.

HINT:

If the power switch turns off immediately after it is turned on (READY), auxiliary battery voltage may be low. Recharge the auxiliary battery and perform this procedure again.

(e) Measure the current flowing from the auxiliary battery with the power switch on (READY), the headlight position switch and blower motor switch in the HI position, and the rear window defogger turned on.

Standard Current:

Item

Condition

Specified Condition

Current flowing from auxiliary battery

Power switch on (READY)

(The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)

0 A or less

(No current from auxiliary battery)

*a	Probe Direction
*b	Current Flowing to Auxiliary Battery

(f) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Item

Condition

Specified Condition

Auxiliary battery voltage

Power switch on (READY)

(The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)

12.5 to 15 V

*a	Probe Direction
*b	Current Flowing from Auxiliary Battery