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 BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge the battery before proceeding to the next
step.
2. CHECK DLC3
(a) The ECU uses ISO 15765-4 for communication. The terminal arrangement of the ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitting ECU
Receiving ECU
Signal
Communication Method
Air Conditioning Control Assembly
Air Conditioning Amplifier Assembly
Rear windo ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
NOTICE:
When disconnecting the steering intermediate shaft assembly and pinion shaft
of the steering gear assembly, be sure to place matchmarks before servicing.
PROCEDURE
1. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
2. S ...