- I4-20 (SI) - Body ground
- I4-36 (+S) - Body ground
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001C9SF |
| Model Year Start: 2019 | Model: GR Corolla | Prod Date Range: [06/2018 - 01/2019] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] | ||
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 |
|---|---|---|---|---|---|
|
I4-1 (B) - Body ground |
LA-SB - Body ground |
Battery |
- |
Always |
11 to 14 V |
|
I4-9 (CANH) |
L |
CAN communication line |
Input/Output |
- |
- |
|
I4-10 (MSCL)*1, *2 |
Y |
Local bus communication line |
Input/Output |
- |
- |
|
I4-11 (SW3) - Body ground |
BR - Body ground |
Light control rheostat (Ground) |
- |
Always |
Below 1 Ω |
|
I4-14 (FV) - Body ground |
GR - Body ground |
Fuel sender gauge (Power source) |
Input |
Engine switch on (IG) |
Pulse generation (See waveform 2) |
|
I4-15 (MSTI) - Body ground |
V - Body ground |
Steering pad switch signal |
Input |
Engine switch on (IG), up, down, right and left switches on steering pad switch not pushed |
4.8 to 5.2 V |
|
I4-16 (SW2) - Body ground |
P - Body ground |
Light control rheostat signal |
Input |
Engine switch on (IG), light control rheostat knob fully turned downward → fully turned upward |
Below 1 V → 4 to 6 V (Gradually change) |
|
I4-17 (TC) - Body ground |
V - Body ground |
Tail cancel switch signal |
Input |
Engine switch on (IG), light control rheostat knob not fully turned upward (Tail cancel switch off) → fully turned upward (Tail cancel switch on) |
Below 1 V → 4 to 6 V |
|
I4-19 (EP) - Body ground |
W-B - Body ground |
Ground |
- |
Always |
Below 1 Ω |
|
I4-20 (SI) - Body ground |
GR - Body ground |
Speed signal for other system (Input) |
Input |
Engine switch on (IG), wheel being rotated |
Pulse generation (See waveform 1) |
|
I4-22 (B) - Body ground |
G - Body ground |
Battery |
- |
Always |
11 to 14 V |
|
I4-23 (ES) - Body ground |
W-B - Body ground |
Ground |
- |
Always |
Below 1 Ω |
|
I4-24 (FE&B) -Body ground |
P - Body ground |
Fuel sender gauge (Ground) |
- |
Always |
Below 1 Ω |
|
I4-25 (CANL) |
W |
CAN communication line |
- |
- |
- |
|
I4-27 (MSCH)*1, *2 |
LG |
Local bus communication line |
- |
- |
- |
|
I4-31 (FR) - I4-24 (FE&B) |
R - P |
Fuel level signal |
Input |
Engine switch on (IG), fuel level full → low (fuel level warning light on) |
Pulse generation (See waveform 2) |
|
I4-32 (MSM+) - Body ground |
GR - Body ground |
Steering pad switch signal |
Input |
Engine switch on (IG), OK and back switches on steering pad switch not pushed |
4.8 to 5.2 V |
|
I4-34 (SW1) - Body ground |
R - Body ground |
Light control rheostat (Power source) |
Input |
Engine switch on (IG) |
4 to 6 V |
|
I4-35 (ILL-) - Body ground |
W-B - Body ground |
Illumination signal |
Output |
Taillights off → on |
Below 1 V → Pulse generation |
|
I4-36 (+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) |
|
I4-38 (IG+) - Body ground |
LG - Body ground |
Engine switch signal |
Input |
Engine switch off → Engine switch on (IG) |
Below 1 V → 11 to 14 V |
|
I5-1 (LL) - Body ground |
LA-V - Body ground |
LH turn switch signal |
Output |
LH turn indicator light off → blinking |
Below 1 V → 11 to 14 V ←→ Below 1 V |
|
I5-2 (LR) - Body ground |
LA-V - Body ground |
RH turn switch signal |
Output |
RH turn indicator light off → blinking |
Below 1 V → 11 to 14 V ←→ Below 1 V |
|
I5-5 (TRNL) - Body ground |
V - Body ground |
LH turn switch signal |
Output |
LH turn indicator light off → blinking |
Below 1 V → 11 to 14 V ←→ Below 1 V |
|
I5-6 (TRNR) - Body ground |
G - Body ground |
RH turn switch signal |
Output |
RH turn indicator light off → blinking |
Below 1 V → 11 to 14 V ←→ Below 1 V |
|
I5-7 (LP) - Body ground |
R - Body ground |
Security indicator signal |
Input |
Security indicator light off → blinking |
Below 2 V → Pulse generation |
|
I5-14 (WLVL) - Body ground*3 |
L - Body ground |
Washer fluid level signal |
Input |
Engine switch on (IG), washer fluid level not low → low |
11 to 14 V → Below 1 V |
|
I5-16 (SW) - Body ground |
P - Body ground |
Brake fluid level signal |
Input |
Engine switch on (IG), brake fluid level not low (brake warning light off) → low (brake warning light on) |
11 to 14 V → Below 1 V |
|
I5-17 (HAZ) - Body ground |
P - Body ground |
Hazard warning signal switch signal |
Input |
Hazard warning signal switch off → pushed |
11 to 14 V → Below 1 V |
|
I5-19 (RCSB) - Body ground |
W - Body ground |
Rear center seat belt warning signal |
Input |
Engine switch on (IG) rear center seat belt unfastened → fastened |
Below 1 V → 11 to 14 V |
|
I5-24 (INT) - Body ground |
B - Body ground |
Tire pressure warning system signal |
Output |
Engine switch on (IG), OK switch on steering pad switch not pushed |
8 to 15 V |
|
I5-31 (OILW) - Body ground |
B - Body ground |
Engine oil level signal |
Input |
Engine switch on (IG), engine oil level not low → low |
Below 1 V → 11 to 14 V |
|
I5-32 (VCM) - Body ground |
L - Body ground |
Vacuum warning switch signal |
Input |
Engine started, vacuum warning switch off (brake warning light off) → on (brake warning light on) |
11 to 14 V → Below 1 V |
|
I5-35 (RRSB) - Body ground |
R - Body ground |
Rear right seat belt warning signal |
Input |
Engine switch on (IG) rear right seat belt unfastened → fastened |
Below 1 V → 11 to 14 V |
|
I5-36 (RLSB) - Body ground |
G - Body ground |
Rear left seat belt warning signal |
Input |
Engine switch on (IG) rear left seat belt unfastened → fastened |
Below 1 V → 11 to 14 V |
- *1: w/ Audio Tab Display
- *2: w/ Headup Display System
- *3: w/ Washer Fluid Level Warning
-
Waveform 1:
Item
Condition
Tester connection
I4-14 (FV) - Body ground
Tool setting
2.5 V/DIV., 20 ms./DIV.
Condition
Engine switch on (IG)
Specified Condition
4.5 to 5.5 V
-
Waveform 2:
Item
Condition
Tester connection
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 3:
Item
Condition
Tester connection
I4-31 (FR) - I4-24 (FE&B)
Tool setting
2.5 V/DIV., 20 ms./DIV.
Condition
Engine switch on (IG), fuel level full → low (fuel level warning light on)
HINT:
(A) will depending on the fuel level.
- Fuel level full: 4.0 to 4.6 V
- Fuel level low (fuel level warning light on): 0.3 to 1.1 V
|
|