Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AJLS
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 - 08/2020]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2019 - 2020 MY Avalon [04/2018 - 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
  • Engine 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

Engine 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

Engine switch on (IG), wheel being rotated

Pulse generation (See waveform 1)

G16-7 (VCM) - Body ground

BE - Body ground

Vacuum warning switch signal

Input

Engine started, vacuum warning switch off (brake warning light off) → Vacuum warning switch on (brake warning light on)

11 to 14 V → Below 1 V

G16-9 (S) - Body ground

LA-R - Body ground

Engine oil pressure signal

Input

Engine not started → Engine started

Below 1 V → 11 to 14 V

G16-12 (SW) - Body ground

G - Body ground

Brake fluid level signal

Input

Engine switch on (IG), brake fluid level not low (brake warning light off) → Brake fluid level low (brake warning light on)

11 to 14 V → Below 1 V

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

LG - BE

Fuel level signal

Input

Engine 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)

-

Engine switch on (IG)

Pulse generation (See waveform 3)

G16-17 (WLVL) - Body ground

LG - Body ground

Washer fluid level signal

Input

Engine 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

Engine 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

Engine 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

Engine 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

Engine 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

Engine 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

Engine 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

Engine 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

Engine 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

Engine 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

-

-

G16-36 (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

Engine switch signal

-

Engine switch off → Engine switch on (IG)

Below 1 V → 11 to 14 V

G16-40 (B) - Body ground

LA-B - Body ground

Battery

-

Always

11 to 14 V

G15-1 (ODO) - Body ground

LA-L - Body ground

ODO/TRIP switch signal

Input

Engine 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

Engine 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

Engine 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

Battery

-

Always

11 to 14 V

G15-10 (TRNL) - Body ground

BE - Body ground

Rear turn signal light LH signal

Output

Engine 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

Engine 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

Engine 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

    Engine 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

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

    HINT:

    • (A) will depending on the fuel level.
    • Engine switch on (IG), fuel level full → Fuel level low (fuel level warning light on) (4.2 to 4.6 V → 0.3 to 1.7 V)
  • Waveform 3:

    Item

    Condition

    Tester connection

    G16-15 (FV) - Body ground

    Tool setting

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

    Condition

    Engine switch on (IG)

    HINT:

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