Toyota Avalon Service & Repair Manual: Hybrid System Indicator Malfunction

DESCRIPTION

A hybrid system indicator has been included on this vehicle. In this circuit, the combination meter assembly receives the hybrid system indicator signal from the hybrid vehicle control ECU via CAN communication. The combination meter assembly controls the operation of the hybrid system indicator according to the hybrid system indicator signal received from the hybrid vehicle control ECU via CAN communication.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • Before replacing the hybrid vehicle control ECU, refer to Registration.

    Click here

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication DTCs are output.

Click here

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK FOR DTC (HYBRID CONTROL SYSTEM)

(a) Check if hybrid control system DTCs are output.

Click here

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO HYBRID CONTROL SYSTEM

A

3.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

HV System Indicator

Hybrid system indicator value

Min.: -101%, Max.: 511% or Unset

Current hybrid system indicator value

"Unset" is displayed when the vehicle is stopped and the power switch is on (READY).

Body Electrical > Combination Meter > Data List

Tester Display

HV System Indicator

OK:

Hybrid system indicator value displayed on the Techstream is almost the same as the hybrid system indicator indication.

OK

REPLACE HYBRID VEHICLE CONTROL ECU

NG

REPLACE COMBINATION METER ASSEMBLY

    How To Proceed With Troubleshooting

    Initialization

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