Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
| *1 | Battery ECU assembly | - | - |
| Terminal No. (Symbols) | Wiring Color | Input/Output | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|---|
| y16-1 (AM) - y16-27 (GND) | BR - W-G | IN | Constant power source | Always | 11 to 14 V |
| y16-27 (GND) - Body ground | W-G | Ground | Ground | Always | Below 1 Ω |
| y16-3 (GND1) - Body ground | GR | Ground | Ground | Always | Below 1 Ω |
| y16-4 (ERTH) - Body ground | LG | Ground | Ground | Always | Below 1 Ω |
| y16-18 (TB0) - y16-17 (GB0) | P - P | IN | Battery temperature sensor 0 | Power switch on (IG) HV battery temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-31 (TB1) - y16-30 (GB1) | Y - Y | IN | Battery temperature sensor 1 | Power switch on (IG) HV battery temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-7 (TB2) - y16-6 (GB2) | L - L | IN | Battery temperature sensor 2 | Power switch on (IG) HV battery temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-20 (TB3) - y16-19 (GB3) | LG - B | IN | Battery temperature sensor 3 | Power switch on (IG) HV battery temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-33 (TB4) - y16-32 (GB4) | GR - W-G | IN | Battery temperature sensor 4 | Power switch on (IG) HV battery temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-9 (TB5) - y16-8 (GB5) | R - W | IN | Battery temperature sensor 5 | Power switch on (IG) HV battery temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-22 (TC0) - y16-21 (GC0) | P-B - V | IN | Intake air temperature sensor | Power switch on (IG) HV battery intake air temperature: -40 to 90°C (-40 to 194°F) | 4.75 (-40°C) to 0.46 V(90°C) |
| y16-12 (IB0) - y16-23 (GIB) | BR- B-W | IN | Battery current sensor 0 | Power switch on (IG) | Approximately 2.8 V |
| y16-24 (IB1) - y16-23 (GIB) | L-W - B-W | IN | Battery current sensor 1 | Power switch on (IG) | Approximately 2.2 V |
| y16-36 (VIB) - y16-23 (GIB) | G - B-W | OUT | Power source for battery current sensor | Power switch on (IG) | 4.5 to 5.5 V |
| y16-13 (IGCT) - y16-27 (GND) | L-W - W-G | IN | Power source | Power switch on (IG) | 11 to 15.5 V |
| y16-14 (SI0) - y16-27 (GND) | P-B - W-G | OUT | HV battery cooling blower operation signal | Cooling fans operating | Pulse generation (Waveform 1) |
| Cooling fans not operating | 4.5 to 5.5 V | ||||
| y16-15 (FP0) - y16-27 (GND) | V - W-G | IN | HV battery cooling blower monitor signal | Cooling fans operating | Pulse generation (Waveform 2) |
| Cooling fans not operating | 0 Hz | ||||
| y16-25 (CA1H) - y16-27 (GND) | B - W-G | IN/OUT | CAN communication line | Power switch on (IG) | Pulse generation (Waveform 3) |
| y16-26 (CA1L) - y16-27 (GND) | LG - W-G | IN/OUT | CAN communication line | Power switch on (IG) | Pulse generation (Waveform 3) |
| y16-28 (CA2L) - y16-27 (GND) | W - W-G | IN/OUT | CAN communication line | Power switch on (IG) | Pulse generation (Waveform 4) |
| y16-29 (CA2H) - y16-27 (GND) | R - W-G | IN/OUT | CAN communication line | Power switch on (IG) | Pulse generation (Waveform 4) |
| y15-1 (GA0) - y15-13 (VA1) | V - P | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-13 (VA1) - y15-25 (VA2) | P - L | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-25 (VA2) - y15-2 (VA3) | L - W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-2 (VA3) - y15-14 (VA4) | W - BR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-14 (VA4) - y15-26 (VA5) | BR - W-G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-26 (VA5) - y15-3 (VA6) | W-G - B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-3 (VA6) - y15-15 (VA7) | B - P-B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-15 (VA7) - y15-27 (VA8) | P-B - L-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-27 (VA8) - y15-4 (VA9) | L-W - LG | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-4 (VA9) - y15-16 (VA10) | LG - B-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-16 (VA10) - y15-28 (VA11) | B-W - Y | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-28 (VA11) - y15-5 (VA12) | Y - G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-5 (VA12) - y15-17 (VA13) | G - GR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-17 (VA13) - y15-29 (VA14) | GR - V | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-29 (VA14) - y15-6 (VA15) | V - R | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-6 (VA15) - y15-18 (VA16) | R - L | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-18 (VA16) - y15-30(VA17) | L - P | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-30(VA17) - y15-7 (VA18) | P - BR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-7 (VA18) - y15-19 (VA19) | BR - W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-19 (VA19) - y15-31 (VA20) | W - B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-31 (VA20) - y15-8 (VA21) | B - W-G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-8 (VA21) - y15-20(VA22) | W-G - L-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-20(VA22) - y15-32 (VA23) | L-W - P-B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-32 (VA23) - y15-9 (VA24) | P-B - B-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-9 (VA24) - y15-21 (VA25) | B-W - LG | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-21 (VA25) - y15-33 (VA26) | LG - G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-33 (VA26) - y15-10(VA27) | G - Y | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-10(VA27) - y15-22 (VA28) | Y - V | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-22 (VA28) - y15-34 (VA29) | V - GR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-34 (VA29) - y15-11 (VA30) | GR - L | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-11 (VA30) - y15-23 (VA31) | L - R | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-23 (VA31) - y15-35 (VA32) | R - BR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-35 (VA32) - y15-12 (VA33) | BR - P | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-12 (VA33) - y15-24 (VA34) | P - B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y15-24 (VA34) - y15-36 (VA35) | B - W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-1 (VAD) - y13-13 (VA36) | W - B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-13 (VA36) - y13-25 (VA37) | B - P | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-25 (VA37) - y13-2 (VA38) | P - BR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-2 (VA38) - y13-14 (VA39) | BR - R | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-14 (VA39) - y13-26 (VA40) | R - L | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-26 (VA40) - y13-3 (VA41) | L - GR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-3 (VA41) - y13-15 (VA42) | GR - V | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-15 (VA42) - y13-27 (VA43) | V - Y | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-27 (VA43) - y13-4 (VA44) | Y - G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-4 (VA44) - y13-16 (VA45) | G - LG | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-16 (VA45) - y13-28 (VA46) | LG - B-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-28 (VA46) - y13-5 (VA47) | B-W - P-B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-5 (VA47) - y13-17 (VA48) | P-B - L-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-17 (VA48) - y13-29 (VA49) | L-W - W-G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-29 (VA49) - y13-6 (VA50) | W-G - B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-6 (VA50) - y13-18 (VA51) | B - W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-18 (VA51) - y13-30(VA52) | W - BR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-30(VA52) - y13-7 (VA53) | BR - P | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-7 (VA53) - y13-19 (VA54) | P - L | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-19 (VA54) - y13-31 (VA55) | L - R | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-31 (VA55) - y13-8 (VA56) | R - V | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-8 (VA56) - y13-20(VA57) | V - GR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-20(VA57) - y13-32 (VA58) | GR - G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-32 (VA58) - y13-9 (VA59) | G - Y | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-9 (VA59) - y13-21 (VA60) | Y - B-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-21 (VA60) - y13-33 (VA61) | B-W - LG | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-33 (VA61) - y13-10(VA62) | LG - L-W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-10(VA62) - y13-22 (VA63) | L-W - P-B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-22 (VA63) - y13-34 (VA64) | P-B - B | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-34 (VA64) - y13-11 (VA65) | B - W-G | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-11 (VA65) - y13-23 (VA66) | W-G - BR | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-23 (VA66) - y13-35 (VA67) | BR - W | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-35 (VA67) - y13-12 (VA68) | W - L | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-12 (VA68) - y13-24 (VA69) | L - P | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
| y13-24 (VA69) - y13-36 (VA70) | P - V | IN | Hybrid Battery Cell Voltage | Always | 1.9 to 4.1 V |
Oscilloscope waveforms
HINT:
Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted.
(a) Waveform 1 (HV battery cooling blower operation signal)
| Item | Content |
|---|---|
| Terminal | y16-14 (SI0) - y16-27 (GND) |
| Equipment Setting | 10 V/DIV., 1 ms/DIV. |
| Condition | Cooling fans operating |
HINT:
The wavelength will vary with the operating speed of the battery cooling blower assembly.
(b) Waveform 2 (HV battery cooling blower monitor signal)
| Item | Content |
|---|---|
| Terminal | y16-15 (FP0) - y16-27 (GND) |
| Equipment Setting | 2 V/DIV., 2 ms/DIV. |
| Condition | Battery cooling blower assembly operating (Active Test of cooling fan being performed) |
HINT:
The wavelength will vary with the operating speed of the battery cooling blower assembly.
(c) Waveform 3 (CAN communication line)
| Item | Content |
|---|---|
| Terminal | CH1: y16-25 (CA1H) - y16-27 (GND) CH2: y16-26 (CA1L) - y16-27 (GND) |
| Equipment Setting | 1 V/DIV., 50 μs/DIV. |
| Condition | Power switch on (IG) |
HINT:
The waveform will vary depending on the content of the digital communication (digital signal).
(d) Waveform 4 (CAN communication line)
| Item | Content |
|---|---|
| Terminal | CH1: y16-29 (CA2H) - y16-27 (GND) CH2: y16-28 (CA2L) - y16-27 (GND) |
| Equipment Setting | 1 V/DIV., 50 μs/DIV. |
| Condition | Power switch on (IG) |
HINT:
The waveform will vary depending on the content of the digital communication (digital signal).
READ NEXT:
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) The battery ECU assembly has a self-diagnosis system. If the computer, hybrid control system, or a component is not working properly, the ECU records the conditions th
Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR DTCS (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / HV battery / Trouble
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA HINT: The battery ECU assembly records vehicle and driving condition information as freeze frame data the moment a DTC is stored. It can be used for estimating or d
SEE MORE:
Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS NOTICE:
If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read and saved, the operation history information could be lost.
The operation history fun
Components
COMPONENTS ILLUSTRATION *1 BRAKE MASTER CYLINDER RESERVOIR FILLER CAP ASSEMBLY - - ILLUSTRATION *1 FRONT DISC BRAKE BLEEDER PLUG *2 FRONT DISC BRAKE BLEEDER PLUG CAP *3 REAR DISC BRAKE BLEEDER PLUG *4 REAR DISC BRAKE BLEEDER PLUG CAP Tightening torque for "Maj
