Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001FP53
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 08/2020]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: TERMINALS OF ECU; 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]

TERMINALS OF ECU

COMBINATION METER ASSEMBLY

(a) Disconnect the G18 combination meter assembly connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No.

Wiring Color

Terminal Description

Condition

Specified Condition

G18-38 (IG+) - Body ground

L - Body ground

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V*1

10.5 to 16 V*2

G18-22 (B) - Body ground

B - Body ground

+B power supply

Ignition switch off

11 to 14 V

G18-1 (B) - Body ground

B - Body ground

+B power supply

Ignition switch off

11 to 14 V

G18-35 (ILL-) - Body ground*3

L - Body ground

Illumination signal

Light control switch off

Below 1 V

Light control switch in tail or head position

11 to 14 V

G18-19 (EP) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G18-23 (ES) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω
  • *1: w/o Stop and Start System
  • *2: w/ Stop and Start System
  • *3: w/ Light Control Rheostat

(c) Reconnect the G18 combination meter assembly connector.

(d) 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

Condition

Specified Condition

G19-24 (INT) - Body ground*1

L - Body ground

Tire pressure warning light signal
  • Ignition switch ON
  • Steering pad switch assembly operated, "Set Pressure" selected on the multi-information display and "Enter" switch (steering pad switch assembly) pressed and held

Below 1.5 V
  • Ignition switch ON
  • "Enter" switch (steering pad switch assembly) off

8 to 15 V

G18-20 (SI) - Body ground

W - Body ground

Speed signal for other system (Input)

Ignition switch ON, wheel being rotated

Pulse generation (See waveform 1)

G18-36 (+S) - Body ground

L - Body ground

Speed signal for other system (Output)

Ignition switch ON, wheel being rotated

Pulse generation (See waveform 1)

G18-14 (FV) - Body ground

GR - Body ground

Fuel sender gauge (Power source)

Ignition switch ON

Pulse generation (See waveform 3)

G18-31 (FR) - G18-24 (FE&B)

LG - BE

Fuel level signal

Ignition switch ON, fuel level full → low (fuel level warning light on)

Pulse generation

(See waveform 2)

G18-13 (FR2) - G18-24 (FE&B)*2

L - BE

Fuel level signal

Ignition switch ON, fuel level full → low (fuel level warning light on)

Pulse generation

(See waveform 2)

G18-24 (FE&B) - Body ground

BE - Body ground

Fuel sender gauge (Ground)

Always

Below 1 Ω

G19-14 (WLVL) - Body ground*3

LG - Body ground

Washer fluid level signal

Ignition switch ON, washer fluid level not low

11 to 14 V

Ignition switch ON, washer fluid level low

Below 1 V

G19-36 (RLSB) - Body ground*5

SB - Body ground

Rear LH seat belt warning light output signal

Ignition switch ON, rear seat belt warning light (LH) off

11 to 14 V

Ignition switch ON, rear seat belt warning light (LH) on

Below 1 V

G19-19 (RCSB) - Body ground*5

B - Body ground

Rear center seat belt warning light output signal

Ignition switch ON, rear seat belt warning light (center) off

11 to 14 V

Ignition switch ON, rear seat belt warning light (center) on

Below 1 V

G19-35 (RRSB) - Body ground*5

LG - Body ground

Rear RH seat belt warning light output signal

Ignition switch ON, rear seat belt warning light (RH) off

11 to 14 V

Ignition switch ON, rear seat belt warning light (RH) on

Below 1 V

G18-25 (CANL)

W

CAN communication line

-

-

G18-9 (CANH)

B

CAN communication line

-

-

G18-10 (MSCL)*4

W

Local bus communication line

-

-

G18-27 (MSCH)*4

G

Local bus communication line

-

-

G18-15 (MSTI) - Body ground

R - Body ground

Steering pad switch signal

Ignition switch ON, up, down, right and left switches on steering pad switch assembly not pushed

4.3 to 5.2 V

Ignition switch ON, left switch on steering pad switch pushed

Below 0.6 V

Ignition switch ON, up switch on steering pad switch pushed

1.0 to 2.2 V

Ignition switch ON, down switch on steering pad switch pushed

2.3 to 3.4 V

Ignition switch ON, right switch on steering pad switch pushed

3.4 to 4.5 V

G18-32 (MSM+) - Body ground

GR - Body ground

Steering pad switch signal

Ignition switch ON, enter and back switches on steering pad switch not pushed

4.3 to 5.2 V

Ignition switch ON, enter switch on steering pad switch pushed

Below 0.6 V

Ignition switch ON, back switch on steering pad switch pushed

1.0 to 2.2 V

G18-34 (SW1) - Body ground*6

R - Body ground

Power source for light control rheostat

Ignition switch ON

4.6 to 5.4 V

G18-16 (SW2) - Body ground*6

G - Body ground

Light control rheostat signal

Light control rheostat fully turned left

Below 1 Ω

Light control rheostat fully turned right

8 to 12 kΩ

G18-17 (TC) - Body ground*6

B - Body ground

TAIL cancel switch signal

TAIL cancel switch on

Below 1 Ω

TAIL cancel switch off

1 MΩ or higher

G18-11 (SW3) - Body ground*6

B - Body ground

Light control rheostat ground

Always

Below 1 Ω

G19-18 (PBKL) - Body ground*8

L - Body ground

Front passenger seat occupant detection sensor signal

Ignition switch ON, front passenger seat not occupied

11 to 14 V

Ignition switch ON, front passenger seat occupied

Below 1 V

G19-34 (PBKL) - Body ground*8

G - Body ground

Front passenger seat belt buckle switch signal

Seat belt fastened

Below 1 V

Seat belt unfastened

11 to 14 V

G19-31 (OILW) - Body ground

W - Body ground

Engine oil level signal

Ignition switch ON, engine oil level not low

Below 1 V

Ignition switch ON, engine oil level low

11 to 14 V

G19-7 (LP) - Body ground

R - Body ground

Security indicator signal

Security indicator light off

Below 2 V

Security indicator light blinking

Pulse generation

G19-17 (HAZ) - Body ground

L - Body ground

Hazard warning signal switch signal (Output)

Hazard warning signal switch off

11 to 14 V

Hazard warning signal switch on

Below 1 V

G19-16 (SW) - Body ground*2

G - Body ground

Brake fluid level signal

Ignition switch ON, brake fluid level full

Below 1 V

Ignition switch ON, brake fluid level low (brake fluid level warning light on)

11 to 14 V

G19-32 (VCM) - Body ground*2

BE - Body ground

Vacuum warning switch signal

Vacuum warning switch off

11 to 14 V

Vacuum warning switch on

Below 1 V

G19-26 (SFT1) - Body ground*9

G - Body ground

Drive mode switch signal (SPORT mode)

Drive mode switch (SPORT mode) off

11 to 14 V

Drive mode switch (SPORT mode) on

Below 1 V

G19-10 (SFT2) - Body ground*9

R - Body ground*2

L - Body ground*7

Drive mode switch signal (NORMAL mode)

Drive mode switch (NORMAL mode) off

11 to 14 V

Drive mode switch (NORMAL mode) on

Below 1 V

G19-27 (SFT3) - Body ground*9

BE - Body ground*2

V - Body ground*7

Drive mode switch signal (ECO mode)

Drive mode switch (ECO mode) off

11 to 14 V

Drive mode switch (ECO mode) on

Below 1 V

G19-6 (TRNR) - Body ground

LA-B - Body ground

Rear turn signal light RH signal

Ignition switch ON, RH turn indicator light off

Below 1 V

Ignition switch ON, RH turn indicator light blinking

11 to 14 V ←→ Below 1 V

G19-5 (TRNL) - Body ground

LA-BE - Body ground

Rear turn signal light LH signal

Ignition switch ON, LH turn indicator light off

Below 1 V

Ignition switch ON, LH turn indicator light blinking

11 to 14 V ←→ Below 1 V

G19-2 (LR) - Body ground

G - Body ground

Front/side turn signal light RH signal

Ignition switch ON, RH turn indicator light off

Below 1 V

Ignition switch ON, RH turn indicator light blinking

11 to 14 V ←→ Below 1 V

G19-1 (LL) - Body ground

L - Body ground

Front/side turn signal light LH signal

Ignition switch ON, LH turn indicator light off

Below 1 V

Ignition switch ON, LH turn indicator light blinking

11 to 14 V ←→ Below 1 V
  • *1: w/ Tire Pressure Warning System
  • *2: for Gasoline Model
  • *3: w/ Washer Level Switch
  • *4: w/ Audio and Visual System
  • *5: w/ Rear Seat Belt Warning Light
  • *6: w/ Light Control Rheostat Switch
  • *7: for HV Model
  • *8: w/o Occupant Classification System
  • *9: w/ Multi-information Display (for 7 Inch Display)

(1) Waveform 1 (Reference):

Item

Condition

Tester connection
  • G18-20 (SI) - Body ground
  • G18-36 (+S) - Body ground

Tool setting

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

Vehicle condition

Ignition switch ON, 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.

(2) Waveform 2:

Item

Condition
*: for Gasoline Model

Tester connection
  • G18-31 (FR) - G18-24 (FE&B)
  • G18-13 (FR2) - G18-24 (FE&B)*

Tool setting

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

Vehicle condition

Ignition switch ON, fuel level full → low (fuel level warning light on)

HINT:

(A) will differ depending on the fuel level.

  • Fuel level full: 4.2 to 4.6 V
  • Fuel level low (fuel level warning light on): 0.3 to 0.7 V

(3) Waveform 3:

Item

Condition

Tester connection

G18-14 (FV) - Body ground

Tool setting

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

Vehicle condition

Ignition switch ON

HINT:

Ignition switch ON (4.5 to 5.5V)