TERMINALS OF ECU
TERMINALS OF ECU
*a | Component without harness connected (Skid Control ECU (Brake Actuator Assembly)) | - | - |
Terminal No. (Symbol) | Terminal Description |
---|---|
1 (GND1) | Skid control ECU (brake actuator assembly) ground |
2 | - |
3 | - |
4 (RL-) | Rear wheel speed LH (-) signal input |
5 (RL+) | Rear wheel speed LH (+) power supply output |
6 (FR-) | Front wheel speed RH (-) signal input |
7 (FR+) | Front wheel speed RH (+) power supply output |
8 | - |
9 (CSW) | VSC OFF switch (combination switch assembly) input |
10 | - |
11 (STP) | Stop light switch assembly input |
12 | - |
13 | - |
14 (+BS) | Solenoid relay power supply |
15 | - |
16 | - |
17 | - |
18 (SP1) | Speed signal output for speedometer |
19 (RR-) | Rear wheel speed RH (-) signal input |
20 (RR+) | Rear wheel speed RH (+) power supply output |
21 (FL-) | Front wheel speed LH (-) signal input |
22 (FL+) | Front wheel speed LH (+) power supply output |
23 | - |
24 | - |
25 | - |
26 | - |
27 (CANH) | CAN communication line H |
28 (FSW+) | Brake pedal load sensing switch (brake pedal support assembly) input |
29 | - |
30 (GND2) | Pump motor ground |
31 | - |
32 (STPO) | Stop light control relay output |
33 | - |
34 | - |
35 (PKB) | Brake hold switch (electric parking brake switch assembly) input |
36 | - |
37 (STP2) | Stop light signal input |
38 | - |
39 | - |
40 | - |
41 | - |
42 | - |
43 (CANL) | CAN communication line L |
44 | - |
45 (IG1) | ECU power supply input |
46 (BM) | Motor relay power supply |
TERMINAL INSPECTION
(a) Disconnect the A41 connector and measure the voltage or resistance on the wire harness side.
*a | Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) | - | - |
HINT:
Voltage cannot be measured with the connector connected to the skid control (brake actuator assembly) as the connector is watertight.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A41-1 (GND1) - Body ground | W-B - Body ground | Skid control ECU (brake actuator assembly) ground | 1 minute or more after disconnecting the cable from the negative (-) battery terminal | Below 1 Ω |
A41-9 (CSW) - Body ground | P - Body ground | VSC OFF switch (combination switch assembly) input | VSC OFF switch (combination switch assembly) pressed and held → released | Below 1 Ω → 10 kΩ or higher |
A41-11 (STP) - Body ground | B - Body ground | Stop light switch assembly input | Stop light switch assembly on → off (brake pedal depressed → released) | 8 to 14 V → Below 1.5 V |
A41-14 (+BS) - Body ground | L - Body ground | Solenoid relay power supply | Always | 11 to 14 V |
A41-18 (SP1) - Body ground | BE - Body ground | Speed signal output for speedometer | Engine switch on (IG) | 11 to 14 V |
A41-28 (FSW+) - Body ground | W - Body ground | Brake pedal load sensing switch (brake pedal support assembly) input | Brake pedal depressed → released | 950 to 1050 Ω → 203 to 223 Ω |
A41-30 (GND2) - Body ground | W-B - Body ground | Pump motor ground | 1 minute or more after disconnecting the cable from the negative (-) battery terminal | Below 1 Ω |
A41-32 (STPO) - Body ground | B - Body ground | Semiconductor PWR integration ECU output | Engine switch on (IG) | 11 to 14 V |
A41-35 (PKB) - Body ground | R - Body ground | Brake hold switch (electric parking brake switch assembly) input | Brake hold switch (electric parking brake switch assembly) pressed and held → released | Below 1 Ω → 10 kΩ or higher |
A41-37 (STP2) - Body ground | P - Body ground | Stop light signal input | Brake pedal depressed → released | 8 to 14 V → Below 1.5 V |
A41-45 (IG1) - Body ground | V - Body ground | ECU power supply input | Engine switch on (IG) | 11 to 14 V |
A41-46 (BM) - Body ground | R - Body ground | Motor relay power supply | Always | 11 to 14 V |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Quarter Trim Speaker (w/o Rear No. 2 Seat): Components
COMPONENTS ILLUSTRATION *A for TMK Made *B for TMMC Made *C for LH Side - - *1 DECK BOARD ASSEMBLY *2 DECK SIDE TRIM BOX RH *3 FRONT DECK FLOOR BOX *4 REAR DECK FLOOR BOX *5 REAR FLOOR FINISH PLATE *6 REAR NO. 3 FLOOR BOARD *7 REAR NO. 4 FLOOR ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Steering Lock System: System Diagram
SYSTEM DIAGRAM Circuit Description Component Outline Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)
The steering is locked and unlocked by communicating with the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) via LIN communicati ...