TERMINALS OF ECU
1. TERMINALS OF ECU
*1 |
Component without harness connected (Brake Actuator (Skid Control ECU)) |
Terminal No. (Symbol) |
Terminal Description |
---|---|
1 (GND2) |
Pump motor ground |
2 (+BM) |
Motor relay power supply |
3 (+BS) |
Solenoid relay power supply |
4 (GND1) |
Skid control ECU ground |
5 (FL-) |
Front wheel speed LH (-) signal input |
6 (RL+) |
Rear wheel speed LH (+) signal input |
8 (RR+) |
Rear wheel speed RH (+) signal input |
9 (FR+) |
Front wheel speed RH (+) signal input |
10 (FR-) |
Front wheel speed RH (-) signal input |
11 (D/G) |
Diagnosis tester communication line |
13 (STP2) |
Stop light control relay input |
14 (CANL) |
CAN communication line L |
16 (TS) |
Sensor check input |
17 (CSW) |
VSC OFF switch input |
20 (FSW+) |
Brake pedal load sensing switch input |
26 (FL+) |
Front wheel speed LH (+) signal input |
27 (RL-) |
Rear wheel speed LH (-) signal input |
28 (IG1) |
ECU power supply |
29 (RR-) |
Rear wheel speed RH (-) signal input |
30 (STP) |
Stop light switch input |
33 (SP1) |
Speed signal output for speedometer |
35 (CANH) |
CAN communication line H |
39 (STP0) |
Stop light control relay output |
2. TERMINAL INSPECTION
(a) Disconnect the connector and measure the voltage and resistance on the wire harness side.
*1 |
Front view of wire harness connector (to Brake Actuator (Skid Control ECU)) |
HINT:
Voltage cannot be measured with the connector connected to the skid control ECU because the connector is watertight.
Standard
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
A42-1 (GND2) - Body ground |
W-B - Body ground |
Pump motor ground |
Always |
Below 1 Ω |
A42-2 (+BM) - Body ground |
Y - Body ground |
Motor relay power supply |
Always |
11 to 14 V |
A42-3 (+BS) - Body ground |
GR - Body ground |
Solenoid relay power supply |
Always |
11 to 14 V |
A42-4 (GND1) - Body ground |
W - Body ground |
Skid control ECU ground |
Always |
Below 1 Ω |
A42-13 (STP2) - Body ground |
R - Body ground |
Stop light control relay input |
Stop light switch ON → OFF (Brake pedal depressed → released) |
8 to 14 V → Below 1.5 V |
A42-17 (CSW) - Body ground |
LG - Body ground |
VSC OFF switch input |
VSC OFF switch held ON → OFF (Not pressed) |
Below 1 Ω → 10 kΩ or higher |
A42-20 (FSW+) - Body ground |
R - Body ground |
Brake pedal load sensing switch input |
Brake pedal load sensing switch OFF → ON (Brake pedal depressed → released) |
950 to 1050 Ω → 203 to 223 Ω |
A42-28 (IG1) - Body ground |
GR - Body ground |
ECU power supply |
Ignition switch ON |
11 to 14 V |
A42-30 (STP) - Body ground |
P - Body ground |
Stop light switch input |
Stop light switch ON → OFF (Brake pedal depressed → released) |
8 to 14 V → Below 1.5 V |
A42-39 (STP0) - Body ground |
BR - Body ground |
Stop light control relay output |
Ignition switch ON |
11 to 14 V |
Diagnosis System
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) Check the DLC3 (See page ).
2. FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR
(a) Initial check.
(1) Turn the ignition switch to ON.
(2) The passenger airbag ON/OFF indicator ("ON" and "OFF") comes o ...
Brake Warning Light Remains ON
DESCRIPTION
The skid control ECU is connected to the combination meter via CAN communication.
If any of the following is detected, the brake warning light remains on:
The skid control ECU connector is disconnected from the skid control
ECU.
T ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT FLUID LEVEL
(a) Check the fluid level.
Text in Illustration
*1
MAX Line
*2
MIN Line
HINT:
If brake ...