| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001G79H |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TERMINALS OF ECU; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
TERMINALS OF ECU
TERMINALS OF ECU
|
*a |
Component without harness connected (Skid Control ECU (Brake Booster with Master Cylinder Assembly)) |
- |
- |
|
Terminal No. (Symbol) |
Terminal Description |
|---|---|
|
1 (MRO1) |
Motor power supply output 1 |
|
2 (MRI1) |
Motor power supply input 1 |
|
3 (FR+) |
Front speed sensor RH (+) power supply output |
|
4 (FR-) |
Front speed sensor RH (-) signal input |
|
5 (+BI2) |
+BI2 power source input |
|
6 |
- (Not used) |
|
7 (RR+) |
Rear speed sensor RH (+) power supply output |
|
8 (RR-) |
Rear speed sensor RH (-) signal input |
|
9 (IG2) |
IG2 power source input |
|
10 |
- (Not used) |
|
11 (SP1) |
Speed sensor signal output |
|
12 (STP) |
Stop light switch assembly input |
|
13 (SKG1) |
Brake pedal stroke sensor assembly ground 1 |
|
14 (+BS) |
ABS solenoid drive power output |
|
15 (+BI1) |
+BI1 power source input |
|
16 (LBL) |
Brake fluid level warning switch (Brake booster with master cylinder assembly) input |
|
17 (SKS1) |
Brake pedal stroke sensor assembly signal input 1 |
|
18 (CSW) |
VSC OFF switch (Combination switch assembly) input |
|
19 (SKS2) |
Brake pedal stroke sensor assembly signal input 2 |
|
20 (CSW2) |
Brake hold switch (Electric parking brake switch assembly) input |
|
21 (VSK2) |
Brake pedal stroke sensor assembly power supply output 2 |
|
22 (STPO) |
Stop light control relay (Stop light switch assembly) output |
|
23 (IG1) |
IG1 power source input |
|
24 (CTY) |
Front door courtesy light switch assembly LH input |
|
25 (VSK1) |
Brake pedal stroke sensor assembly power supply output 1 |
|
26 (GND1) |
Skid control ECU (Brake booster with master cylinder assembly) ground 1 |
|
27 (MRO2) |
Motor power supply output 2 |
|
28 (MRI2) |
Motor power supply input 2 |
|
29 (CA2L) |
CAN communication line 2 (L) |
|
30 (CA2H) |
CAN communication line 2 (H) |
|
31 (FL+) |
Front speed sensor LH (+) power supply output |
|
32 (FL-) |
Front speed sensor LH (-) signal input |
|
33 (SKG2) |
Brake pedal stroke sensor assembly ground 2 |
|
34 (RL+) |
Rear speed sensor LH (+) power supply output |
|
35 (RL-) |
Rear speed sensor LH (-) signal input |
|
36 |
- (Not used) |
|
37 (STP2) |
Stop light control relay (Stop light switch assembly) input |
|
38 |
- (Not used) |
|
39 (GND2) |
Skid control ECU (Brake booster with master cylinder assembly) ground 2 |
|
40 (+BM) |
ABS motor drive power output |
|
41 (BM) |
ABS motor relay power supply input |
|
42 (CA1L) |
CAN communication line 1 (L) |
|
43 (CA1H) |
CAN communication line 1 (H) |
|
44 (SFRR) |
Front ABS reduction solenoid RH (-) output |
|
45 (SFLR) |
Front ABS reduction solenoid LH (-) output |
|
46 (SRRR) |
Rear ABS reduction solenoid RH (-) output |
|
47 (SRLR) |
Rear ABS reduction solenoid LH (-) output |
|
48 (SFRH) |
Front ABS holding solenoid RH (-) output |
|
49 (SFLH) |
Front ABS holding solenoid LH (-) output |
|
50 (SRRH) |
Rear ABS holding solenoid RH (-) output |
|
51 (SRLH) |
Rear ABS holding solenoid LH (-) output |
|
52 (BS) |
ABS solenoid relay power supply input |
TERMINAL INSPECTION
(a) Disconnect the connector and measure the voltage or resistance on the wire harness side.
|
*a |
Front view of wire harness connector (to Skid Control ECU (Brake Booster with Master Cylinder Assembly)) |
- |
- |
HINT:
The voltage cannot be measured with the connector connected to the skid control ECU (brake booster with master cylinder assembly) as the connector is watertight.
Standard
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
A48-2 (MRI1) - Body ground |
B - Body ground |
Motor power supply input 1 |
Always |
11 to 14 V |
|
A48-5 (+BI2) - Body ground |
B - Body ground |
+BI2 power source input |
Always |
11 to 14 V |
|
A48-9 (IG2) - Body ground |
W - Body ground |
IG2 power source input |
Power switch on (IG) |
11 to 14 V |
|
A48-12 (STP) - Body ground |
LG - Body ground |
Stop light switch assembly input |
Stop light switch assembly on → off (Brake pedal depressed → released) |
11 to 14 V → 1.5 V or less |
|
A48-15 (+BI1) - Body ground |
V - Body ground |
+BI1 power source input |
Always |
11 to 14 V |
|
A48-16 (LBL) - Body ground |
P - Body ground |
Brake fluid level warning switch (Brake booster with master cylinder assembly) input |
Brake fluid level warning switch off → on |
1.84 to 2.16 kΩ → Below 1 Ω |
|
A48-18 (CSW) - Body ground |
BR - Body ground |
VSC OFF switch (Combination switch assembly) input |
VSC OFF switch (Combination switch assembly) held on → off (Released) |
Below 50 Ω → 10 kΩ or higher |
|
A48-20 (CSW2) - Body ground |
LG - Body ground |
Brake hold switch (Electric parking brake switch assembly) input |
Brake hold switch (Electric parking brake switch assembly) held on → off (Released) |
Below 50 Ω → 10 kΩ or higher |
|
A48-22 (STPO) - Body ground |
P - Body ground |
Stop light control relay (Stop light switch assembly) output |
Always |
11 to 14 V |
|
A48-23 (IG1) - Body ground |
B - Body ground |
IG1 power source input |
Power switch on (IG) |
11 to 14 V |
|
A48-24 (CTY) - Body ground |
Y - Body ground |
Front door courtesy light switch assembly LH input |
Driver door closed → open |
11 to 14 V → 1.5 V or less |
|
A48-26 (GND1) - Body ground |
W-B - Body ground |
Skid control ECU (Brake booster with master cylinder assembly) ground 1 |
1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal |
Below 1 Ω |
|
A48-28 (MRI2) - Body ground |
R - Body ground |
Motor power supply input 2 |
Always |
11 to 14 V |
|
A48-37 (STP2) - Body ground |
GR - Body ground |
Stop light control relay (Stop light switch assembly) input |
Stop light switch assembly on → off (Brake pedal depressed → released) |
11 to 14 V → 1.5 V or less |
|
A48-39 (GND2) - Body ground |
W-B - Body ground |
Skid control ECU (Brake booster with master cylinder assembly) ground 2 |
1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal |
Below 1 Ω |
|
A48-41 (BM) - Body ground |
W - Body ground |
ABS motor relay power supply input |
Always |
11 to 14 V |
|
A48-52 (BS) - Body ground |
W - Body ground |
ABS solenoid relay power supply input |
Always |
11 to 14 V |
|
|