Toyota CH-R Service Manual: Terminals Of Ecu

F4-39 (IG+) - Body ground

P - Body ground

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

F4-40 (B) - Body ground

SB - Body ground

Battery

Always

11 to 14 V

F5-1 (B) - Body ground

SB - Body ground

Battery

Always

11 to 14 V

F4-1 (RLMT) - Body ground*1

L - Body ground

Rear seat belt LH warning light signal

Rear seat belt LH fastened within 30 seconds of opening rear door with ignition switch ON

11 to 14 V

Rear seat belt LH unfastened within 30 seconds of opening rear door with ignition switch ON

Below 1 V

F4-2 (RCMT) - Body ground*1

V - Body ground

Rear seat center belt warning light signal

Rear seat center belt fastened within 30 seconds of opening rear door with ignition switch ON

11 to 14 V

Rear seat center belt unfastened within 30 seconds of opening rear door with ignition switch ON

Below 1 V

F4-3 (RRMT) - Body ground*1

W - Body ground

Rear seat belt RH warning light signal

Rear seat belt RH fastened within 30 seconds of opening rear door with ignition switch ON

11 to 14 V

Rear seat belt RH unfastened within 30 seconds of opening rear door with ignition switch ON

Below 1 V

F4-4 (INT) - Body ground*2

B - Body ground

Tire pressure warning light signal

Ignition switch ON, tire pressure warning light off

Below 1 V

Ignition switch ON, tire pressure warning light on

11 to 14 V

F4-5 (SI) - Body ground

GR - Body ground

Speed signal for other system (Input)

Ignition switch ON, wheel being rotated

Pulse generation (See waveform 1)

F4-6 (+S) - Body ground

V - Body ground

Speed signal for other system (Output)

Ignition switch ON, wheel being rotated

Pulse generation (See waveform 1)

F4-7 (PKBI) - Body ground*3

GR - Body ground

Front passenger side seat belt buckle switch signal

Ignition switch ON, front passenger side seat belt fastened and front passenger seat occupied

11 to 14 V

Ignition switch ON, front passenger side seat belt unfastened and front passenger seat occupied

Below 1 V

F4-9 (S) - Body ground

G - Body ground

Engine oil pressure switch signal

Ignition switch ON, low engine oil level warning light on

Below 1 V

Ignition switch ON, low engine oil level warning light off

11 to 14 V

F4-10 (MSD) - Body ground*1

V - Body ground

Rear seat inner belt signal (LH side)

Ignition switch ON, rear LH seat belt unfastened

Below 1 V

Ignition switch ON, rear LH seat belt fastened

11 to 14 V

F4-11 (MSTI) - Body ground*1

BE - Body ground

Rear seat inner belt signal (Center)

Ignition switch ON, rear center seat belt unfastened

Below 1 V

Ignition switch ON, rear center seat belt fastened

11 to 14 V

F4-12 (SW) - Body ground

R - Body ground

Brake system warning light (red indicator) signal

Ignition switch ON, brake system warning light (red indicator) on

Below 1 V

Ignition switch ON, brake system warning light (red indicator) off

11 to 14 V

F4-13 (MSFM) - Body ground*1

R - Body ground

Rear seat inner belt signal (RH side)

Ignition switch ON, rear RH seat belt unfastened

Below 1 V

Ignition switch ON, rear RH seat belt fastened

11 to 14 V

F4-16 (FV) - Body ground

GR - Body ground

Fuel sender gauge (Power source)

Fuel F (full tank) → E (empty)

4.5 to 5.5 V

F4-17 (WLVL) - Body ground*4

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

F4-20 (SW3) - Body Ground

W - Body ground

Light control rheostat switch ground

Always

Below 1 Ω

F4-21 (ET) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F4-23 (FR) - F4-15 (FE&B)

G - BE

Fuel level signal

Ignition switch ON fuel level full

Below 1 V

Ignition switch ON fuel level low (fuel level warning light on)

4.5 to 9 V

F4-24 (TC) - Body Ground

V - Body ground

TAIL cancel switch signal

TAIL cancel switch OFF → ON

10 kΩ or higher → Below 1 Ω

F4-25 (SW1) - Body Ground

G - Body ground

Power source for light control rheostat

Ignition switch ON

4.6 to 5.4 V

F4-26 (SW2) - Body Ground

L - Body ground

Light control rheostat knob input

Light control rheostat knob fully turned downward

Below 1 Ω

Light control rheostat knob fully turned upward

10 kΩ or higher

F4-28 (MSM+) - Body ground

V - Body ground

Steering pad switch signal

Ignition switch ON, enter, trip 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, trip switch on steering pad switch pushed

1.0 to 2.2 V

Ignition switch ON, back switch on steering pad switch pushed

2.3 to 3.4 V

F4-31 (CANL) - Body ground

SB - Body ground

CAN communication line

-

-

F4-32 (CANH) - Body ground

V - Body ground

CAN communication line

-

-

F4-33 (MSSL) - Body ground

GR - 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

F4-34 (TEMP) - Body ground

SB - Body ground

Ambient temperature sensor signal

Ambient temperature 25°C (77°F)

1.6 to 1.8 Ω

F4-35 (TX1+) - Body ground

P - Body ground

Ambient temperature sensor gauge signal

Always

Below 1 Ω

F5-2 (VCM) - Body ground*5

GR - Body ground

Vacuum warning switch signal

Ignition switch ON, engine idle speed

Pulse generation

F5-3 (HAZ) - Body ground

W - 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

F5-5 (TRNR) - Body ground

SB - 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

F5-6 (TRNL) - Body ground

Y - 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

F5-7 (LR) - Body ground

V - 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

F5-8 (SW) - Body ground

L - Body ground

Turn signal switch (full turn) signal

Headlight dimmer switch on (full turn)

Below 1 V

Headlight dimmer switch off

11 to 14 V

F5-9 (ER) - Body ground

P - Body ground

RH turn indicator light signal (Input)

Ignition switch ON, RH turn signal switch on

Below 1 V

Ignition switch ON, RH turn signal switch off

11 to 14 V

F5-10 (EL) - Body ground

B - Body ground

LH turn indicator light signal (Input)

Ignition switch ON, LH turn signal switch on

Below 1 V

Ignition switch ON, LH turn signal switch off

11 to 14 V

F5-13 (LL) - Body ground

G - 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

Tool setting

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

Vehicle condition

Ignition switch ON wheel being rotated