Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001Q0B6
Model Year Start: 2021 Model: Avalon HV Prod Date Range: [08/2020 -           ]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): TERMINALS OF ECU; 2021 - 2022 MY Avalon HV [08/2020 -        ]

TERMINALS OF ECU

COMBINATION METER ASSEMBLY

(a) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Signal Input/Output

Condition

Specified Condition

G16-1 (ILL-) - Body ground

LA-L - Body ground

Illumination signal

Output

Taillights off → Taillights on

Below 1 V → Pulse generation

G16-2 (EP) - Body ground

W-B - Body ground

Ground

-

Always

Below 1 Ω

G16-4 (INT) - Body ground

L - Body ground

Tire pressure warning ECU and receiver signal

Output
  • Power switch on (IG)
  • Steering pad switch assembly operated, "TPWS" selected on the multi-information display and "OK" switch (steering pad switch assembly) pressed and held → "OK" switch (steering pad switch assembly) off

Below 1.5 V → 8 to 15 V

G16-5 (SI) - Body ground

W - Body ground

Speed signal for other systems (Input)

Input

Power switch on (IG), wheel being rotated

Pulse generation (See waveform 1)

G16-6 (+S) - Body ground

L - Body ground

Speed signal for other systems (Output)

Output

Power switch on (IG), wheel being rotated

Pulse generation (See waveform 1)

G16-14 (FR) - G16-33 (FE)

LG - BE

Fuel level signal

Input

Power switch on (IG), fuel level full → Fuel level low (fuel level warning light on)

Pulse generation (See waveform 2)

G16-15 (FV) - Body ground

GR - Body ground

Fuel sender gauge (Power source)

-

Power switch on (IG)

Pulse generation (See waveform 3)

G16-17 (WLVL) - Body ground

LG - Body ground

Washer fluid level signal

Input

Power switch on (IG), washer fluid level not low → Washer fluid level low

11 to 14 V → Below 1 V

G16-18 (RLMT) -Body ground

BE - Body ground

Rear seat belt warning light LH signal

Output

Power switch on (IG), rear seat belt warning light LH (radio and display receiver assembly) off → Rear seat belt warning light LH (radio and display receiver assembly) on

11 to 14 V → Below 1 V

G16-19 (RCMT) -Body ground

R - Body ground

Rear seat belt warning light center signal

Output

Power switch on (IG), rear seat belt warning light center (radio and display receiver assembly) off → Rear seat belt warning light center (radio and display receiver assembly) on

11 to 14 V → Below 1 V

G16-20 (RRMT) -Body ground

G - Body ground

Rear seat belt warning light RH signal

Output

Power switch on (IG), rear seat belt warning light RH (radio and display receiver assembly) off → Rear seat belt warning light RH (radio and display receiver assembly) on

11 to 14 V → Below 1 V

G16-21 (ES) - Body ground

W-B - Body ground

Ground

-

Always

Below 1 Ω

G16-24 (RLSB) - Body ground

SB - Body ground

Rear seat belt buckle switch LH signal

Input

Power switch on (IG), rear seat belt LH unfastened → Fastened

Below 1 V → 11 to 14 V

G16-25 (RCSB) - Body ground

B - Body ground

Rear seat belt buckle switch center signal

Input

Power switch on (IG), rear seat belt center unfastened → Fastened

Below 1 V → 11 to 14 V

G16-26 (RRSB) - Body ground

LG - Body ground

Rear seat belt buckle switch RH signal

Input

Power switch on (IG), rear seat belt RH unfastened → Fastened

Below 1 V → 11 to 14 V

G16-27 (OILW) - Body ground

W - Body ground

Engine oil level signal

Input

Power switch on (IG), engine oil level not low → Engine oil level low

Below 1 V → 11 to 14 V

G16-28 (MSM+) - Body ground

GR - Body ground

Steering pad switch assembly signal

Input

Power switch on (IG), up, down, right and left switches on steering pad switch assembly not pushed

4.8 to 5.2 V

G16-29 (MSTI) - Body ground

R - Body ground

Steering pad switch assembly signal

Input

Power switch on (IG), OK and back switches on steering pad switch assembly not pushed

4.8 to 5.2 V

G16-31 (CANL)

W

CAN communication line

Input/Output

-

-

G16-32 (CANH)

B

CAN communication line

Input/Output

-

-

G16-34 (LST1) - Body ground

L - Body ground

Fuel lid operation signal

Input

"Ready to Refuel" displayed on multi-information display

Pulse generation (See waveform 4)

"Close Fuel Lid" displayed on multi-information display

Pulse generation (See waveform 5)

Power switch on (IG)

11 to 14 V

G16-36 (TX+)

G

Local bus communication line

Input/Output

-

-

G16-37 (TX-)

W

Local bus communication line

Input/Output

-

-

G16-39 (IG+) - Body ground

GR - Body ground

Power switch signal

-

Power switch off → Power switch on (IG)

Below 1 V → 11 to 14 V

G16-40 (B) - Body ground

LA-B - Body ground

Auxiliary battery

-

Power switch off

11 to 14 V

G15-1 (ODO) - Body ground

LA-L - Body ground

ODO/TRIP switch signal

Input

Power switch on (IG), ODO/TRIP switch (trip switch) not pushed

4.8 to 5.2 V

G15-2 (TR) - Body ground

L - Body ground

Light control rheostat switch signal

Input

Power switch on (IG), light control rheostat up switch (trip switch) and light control rheostat down switch (trip switch) not pushed

4.8 to 5.2 V

G15-3 (HAZ) - Body ground

LA-R - Body ground

Hazard warning switch signal

Input

Hazard warning switch assembly (radio and display receiver assembly) off → Hazard warning switch assembly (radio and display receiver assembly) pushed

11 to 14 V → Below 1 V

G15-5 (SW3) - Body ground

LA-B - Body ground

Ground for trip switch

-

Always

Below 1 Ω

G15-7 (LR) - Body ground

LA-G - Body ground

Front turn signal light RH signal

Output

Power switch on (IG), RH turn indicator light off → RH turn indicator light blinking

Below 1 V → 11 to 14 V ←→ Below 1 V

G15-8 (B) - Body ground

LA-B - Body ground

Auxiliary battery

-

Power switch off

11 to 14 V

G15-10 (TRNL) - Body ground

BE - Body ground

Rear turn signal light LH signal

Output

Power switch on (IG), LH turn indicator light off → LH turn indicator light blinking

Below 1 V → 11 to 14 V ←→ Below 1 V

G15-11 (LL) - Body ground

LA-LG - Body ground

Front turn signal light LH signal

Output

Power switch on (IG), LH turn indicator light off → LH turn indicator light blinking

Below 1 V → 11 to 14 V ←→ Below 1 V

G15-13 (TRNR) - Body ground

BE - Body ground

Rear turn signal light RH signal

Output

Power switch on (IG), RH turn indicator light off → RH turn indicator light blinking

Below 1 V → 11 to 14 V ←→ Below 1 V
  • Waveform 1:

    Item

    Condition

    Tester connection
    • G16-5 (SI) - Body ground
    • G16-6 (+S) - Body ground

    Tool setting

    5 V/DIV., 20 ms./DIV.

    Condition

    Power switch on (IG), wheel being rotated

    HINT:

    When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

  • Waveform 2:

    Item

    Condition

    Tester connection

    G16-14 (FR) - G16-33 (FE)

    Tool setting

    2.5 V/DIV., 20 ms./DIV.

    Condition

    Power switch on (IG), fuel level full → low (fuel level warning light on)

    HINT:

    • (A) will depending on the fuel level.
    • Power switch on (IG), fuel level full → Fuel level low (fuel level warning light on) (4.2 to 4.6 → 0.3 to 1.2 V)
  • Waveform 3:

    Item

    Condition

    Tester connection

    G16-15 (FV) - Body ground

    Tool setting

    2.5 V/DIV., 20 ms./DIV.

    Condition

    Power switch on (IG)

    HINT:

    Power switch on (IG) (4.5 to 5.5 V)

  • Waveform 4:

    Item

    Condition

    Tester Connection

    G16-34 (LST1) - Body ground

    Tool setting

    5 V/DIV., 20 ms./DIV.

    Condition

    "Ready to Refuel" displayed on multi-information display
  • Waveform 5:

    Item

    Condition

    Tester Connection

    G16-34 (LST1) - Body ground

    Tool setting

    5 V/DIV., 20 ms./DIV.

    Condition

    "Close Fuel Lid" displayed on multi-information display

    HINT:

    This waveform is output when the fuel lid opener switch is operated if the fuel lid is open and any of the following conditions are met:

    • The vehicle has been driven for 1 km (0.6 mile) or more at a speed of 50 km/h (31 mph) or more.
    • 30 minutes or more have elapsed since the fuel lid opener switch was operated.