ECU Data (for PRIUS, RX400h, GS450h and CAMRY HV)
The HV ECU and the battery ECU have a lot of ECU data.
The following describes the contents and uses of ECU data based on systems.
Data from which driving conditions can be learned are shown using a «, and data which can be utilized for troubleshooting are shown using a ¶. (Other data items also need to be confirmed, because they might be important depending on the situation.)
i. HV ECU ¥ ECU data + FFD, l ECU data only, ¡ FFD only
Item(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
Sensor Signals / «Vehicle Spd
(Vehicle Spd) / km/h
or
MPH / ¥ / ¥ / ¥ / ¥ / Shows vehicle speed
(a vehicle speed signal from the skid control ECU).
«Vehicle Speed (Resolver)
(VHCL SPD (RSLVR)) / km/h
or
MPH / l / l / l / l / Shows vehicle speed calculated based on the speed sensor (resolver) for MG2.
+B (+B) / V / ¥ / ¥ / ¥ / ¥ / Shows voltage of the auxiliary battery (12 V).
(+B1 and +B2 terminals)
Ambient Temperature (Ambient Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows temperature detected by the ambient temperature sensor for A/C system control.
Accel Pedal Pos #1 (Accel Pos #1) / % / ¥ / ¥ / ¥ / ¥ / Shows the accelerator pedal position sensor No.1.
Sensor voltage is multiplied by 20 and expressed as a percentage. e.g.: 15.6 ~ 72.1 %
Accel Pedal Pos #2 (Accel Pos #2) / % / ¡ / ¥ / ¥ / ¥ / Shows the accelerator pedal position sensor No.2.
Sensor voltage is multiplied by 20 and expressed as a percentage. e.g.: 31.7 ~ 89.0 %
Accel Sensor Main
(Accel Sensor M) / % / ¡ / ¡ / ¡ / ¡ / Shows main accelerator pedal position sensor main.
«Accelerator Degree / % / l / l / l / l / Shows ECU judgement of accelerator pedal opening amount.
(0 ~ 100 %)
¶Shift Sensor Shift Pos
(Shift Position) / Position / ¥ / ¥ / ¥ / ¥ / Shows shift lever position detected by the shift lever position sensor.
Shift Sensor Main
(M Shift Sensor) / V / l / - / - / - / Shows output voltage of the shift position sensor (main). (Examples of actual measurement)
Shifting into the R position: approx. 0.8 V
Selector lever in its home position: approx. 2.4 V
Shifting into the B or D position: approx. 4.0 V
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
Sensor Signals / Shift Sensor Sub
(S Shift Sensor) / V / l / - / - / - / Shows output voltage of the shift position sensor (sub).
Examples of actual measurements:
Shifting into the R position: approx. 0.8 V
Selector lever in its home position: approx. 2.4 V
Shifting into the B or D position: approx. 4.0 V
Shift Sensor Select Main
(Sm Shift Sensor) / V / l / - / - / - / Shows output voltage of the select position sensor (main).
Examples of actual measurements:
Selector lever in its home position: approx. 3.5 V
Shifting into the R, N or D position: approx. 1.5 V
Shift Sensor Select Sub
(Ss Shift Sensor) / V / l / - / - / - / Shows output voltage of the select position sensor (sub). Examples of actual measurements:
Selector lever in its home position: approx. 3.5 V
Shifting into the R, N or D position: approx. 1.5 V
Shift Sensor Shift Pos (Shift Position) / ON-OFF / - / l / l / l / Shows the shift lever position (P, R, N, D or B).
Shift Sensor Switch-FD
(SHIFT SW FD) / ON-OFF / - / l / l / l / Shows FD signal of the shift sensor.
Comes ON when the shift lever is in D or B.
Shift Sensor Switch-RV
(SHIFT SW RV) / ON-OFF / - / l / l / l / Shows RV signal of the shift sensor.
Comes ON when the shift lever is in R.
Shift Sensor Switch-MJ
(SHIFT SW MJ) / ON-OFF / - / l / l / l / Shows MJ signal of the shift sensor.
Comes ON when the shift lever position is identified.
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
Engine Signals / «Target Engine Rev (Target Eng Spd) / rpm / l / l / l / l / Shows target engine revolution speed.
«Engine Spd
(Engine Spd) / rpm / ¥ / ¥ / ¥ / ¥ / Shows actual engine speed.
«Engine Revolution
(Engine Rev)
«Request Power (Power Rqst) / W / ¥ / ¥ / ¥ / ¥ / Shows requested engine power output value.
The HV ECU requests engine power output based on accelerator pedal position and vehicle speed.
¶Throttle Position (Throttle POS) / % / - / ¥ / ¥ / ¥ / Shows the throttle position sensor No.1 opening amount.
Sensor voltage is multiplied by 20 and expressed as a percentage.
Calculate Load
(Calc Load) / % / - / ¥ / ¥ / ¥ / Shows engine load condition.
¶Intake Air Temperature
(Intak Air Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows engine intake air temperature.
¶Engine Coolant Temp
(Coolant Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows engine coolant temperature.
HCAC OBD Request
(HCAC Absrt Rqst) / No-
Request / l / l / l / l / Shows requests HC adherence OBD demand.
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
MG2 / «Motor (MG2) Revolution
(MG2 Rev) / rpm / ¥ / ¥ / ¥ / ¥ / Shows MG2 rpm (resolver).
«Motor (MG2) Torq (MG2 Torq) / N·m / ¥ / ¥ / ¥ / ¥ / Shows requested MG2 torque value.
(HV ECU ® MG ECU)
«M (MG2) Trq Exec Val
(MG2 Trq Exc Val) / N·m / l / l / l / l / Shows MG2 torque execution value (based on feedback from current sensors).
¶Motor Temp No1 (Motor1 Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows MG2 temperature.
Open circuit (5 V):
-50°C (-58°F)
Short circuit (0 V):
205°C (401°F)
Motor Temp MG2 (No1)
(MG2 (No1) Temp)
¶Inverter Temp-(MG2)
(MG2 Invert Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows MG2 inverter temperature.
Open circuit (0 V):
150°C (302°F)
Highest voltage (5 V): 15°C (59°F)
MG2 Gate Status (MG2 Gate) / ON-OFF / l / l / l / l / Shows shutdown condition of the MG2 inverter.
MG2 Control Mode (MG2 Ctrl Mode) / - / l / l / l / l / Shows waveform mode that drives MG2.
0 = PWM: Low speed
(Torque change is small.)
1 = Variable PWM: Middle speed
(Output increases.)
2 = Rectangular wave: High speed
(Output increases.)
MG2 Carrier Frequency
(MG2 Carrir Freq) / kHz / l / l / l / l / Shows PWM signal frequency to MG2.
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
MG1 / «Generat or (MG1) Rev (MG1 Rev) / rpm / ¥ / ¥ / ¥ / ¥ / Shows MG1 speed (resolver).
«Generator (MG1) Torq (MG1 torq) / N·m / ¥ / ¥ / ¥ / ¥ / Shows requested MG1 torque value.
(HV ECU ® MG ECU)
«G (MG1) Trq Exec Val
(MG1 Trq Exc Val) / N·m / l / l / l / l / Shows MG1 torque execution value (based on feedback from current sensors).
¶Motor Temp No.2 (Motor2 Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows MG1 temperature.
Open circuit (5 V):
-50°C (-58°F)
Short circuit (0 V):
205°C (401°F)
Motor Temp MG2 (No2)
(MG2 (No2) Temp)
¶Inverter Temp-(MG1)
(MG1 Invert Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows MG1 inverter temperature.
Open circuit (0 V):
150°C (302°F)
Highest voltage (5 V): 15°C (59°F)
MG1 Gate Status (MG1 Gate) / ON-OFF / l / l / l / l / Shows shutdown condition of the MG1 inverter.
MG1 Control Mode (MG1 Ctrl Mode) / - / l / l / l / l / Shows waveform mode that drives MG1.
0 = PWM: Low speed
(Torque change is small.)
1 = Variable PWM: Middle speed
(Output increases.)
2 = Rectangular wave: High speed
(Output increases.)
MG1 Carrier Frequency
(MG1 Carrir Freq) / kHz / l / l / l / l / Shows PWM signal frequency of MG1.
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
MGR / «Rear Motor Revolution
(Rr Motor Rev) / rpm / - / ¥ / - / - / Shows MGR speed (resolver).
«Rear Motor Torq
(Rr Motor) / N·m / - / ¥ / - / - / Shows requested MGR torque value.
(HV ECU ® MG ECU)
«Rear Mtr Trq Exec Val
(R-Motor Trq Exc) / N·m / - / l / - / - / Shows MGR torque execution value
(based on feedback from current sensors).
¶Rear Motor Temp (Rr Motor Temp) / °C or °F / - / ¥ / - / - / Shows MGR temperature.
Open circuit (5 V):
-50°C (-58°F)
Short circuit (0 V):
205°C (401°F)
¶Rear Inverter Temp / °C or °F / - / ¥ / - / - / Shows MGR inverter temperature.
Open circuit (0 V):
150°C (302°F)
Highest voltage (5 V): 15°C (59°F)
Shutdown (Rear) (Shutdown Rr) / ON-OFF / - / l / - / - / Shows shutdown condition of the MGR inverter.
Rmg Control Mode (Rmg Ctrl Mode) / - / - / l / - / - / Shows waveform mode that drives MGR.
0 = PWM: Low speed
(Torque change is small.)
1 = Variable PWM: Middle speed
(Output increases.)
2 = Rectangular wave: High speed
(Output increases.)
Rmg Carrier Frequency
(Rmg Carrir Freq) / kHz / - / l / - / - / Shows PWM signal frequency of MGR.
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
Boost Converter / «VL-Voltage before Raise (VL) / V / ¥ / ¥ / ¥ / ¥ / Shows voltage before boost.
«VH-Voltage after Raise (VH) / V / ¥ / ¥ / ¥ / ¥ / Shows voltage after boost.
Accelerator pedal depressed deeply with the shift lever in the D position: maximum boost
Raising Pressure Ratio
(Rais Pres Ratio) / % / l / l / l / l / Shows boost ratio
Example:
Before boost: 300 V
After boost: 450 V
® Boost ratio: approx. 33 % (150/450)
¶Converter Temperature (Converter Temp) / °C or °F / ¥ / ¥ / ¥ / ¥ / Shows boost converter temperature.
Open circuit (0 V):
150°C (302°F)
Highest voltage (5 V): 15°C (59°F)
Converter Gate Status (Cnv Gate) / ON-OFF / l / l / l / l / Shows shutdown condition of the boost converter.
Converter Carrier Freq
(Cnv Carier Freq) / kHz / l / l / l / l / Shows PWM signal frequency of the boost converter.
DC-DC Converter / Target Battery Voltage
(DCDC Converter) (TAR BAT VOL (DC)) / V / - / - / l / l / Shows DC-DC converter auxiliary battery target drive voltage.
DCDC Converter cooling fan mode
(DCDC FAN MODE) / - / - / - / l / l / Shows DC-DC converter cooling fan mode.
Inverter Coolant Water Temperature
(Inv Coolant Tmp) / °C / - / - / l / l / Shows PCU coolant temperature Cold start to fully warmed up: Temp. gradually rises.
HV Battery / «Status of Charge
(SOC) / % / ¥ / ¥ / ¥ / ¥ / Shows state of charge (SOC) of the high-voltage battery.
Usually, SOC is determined based on calculation of electrical current levels.
SOC will default to 60 % after SOC data is reset, and then move closer to the actual level based on IV judgement.
Control target level: 60 %
Upper control limit: 75 %
Lower control limit: 30 %
«SOC (SOC)
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
HV Battery / ¶WOUT Control Power
(WOUT Ctrl Power) / W / ¥ / ¥ / ¥ / ¥ / Shows the amount of electricity that can be discharged from the high-voltage battery.
(The wattage value which is calculated by the HV ECU.)
This discharge control value changes depending on battery temperature or SOC.
¶ WIN Control Power
(WIN Ctrl Power) / W / ¥ / ¥ / ¥ / ¥ / Shows the amount of electricity that can be charged to the high-voltage battery. (The wattage value which is calculated by the HV ECU.)
This charge control value changes depending on battery temperature and SOC.
«Power Resource VB (Pwr Resource VB) / V / ¥ / ¥ / ¥ / ¥ / Shows HV battery voltage (total voltage).
«Power Resource IB (Pwr Resource IB) / A / ¥ / ¥ / ¥ / ¥ / Shows electrical current value of the HV battery current sensor.
¶Short Wave Highest Val
(Short Wave High) / V / l / l / l / l / Shows voltage for the leak detection circuit.
Normal: approx. 5 V
Abnormal: Declines toward 0 V
* Voltage decrease at the time of voltage boost is ignored.
* The voltage level is set to 1.5 V for 45 seconds after IG ON in order to check the leak detection circuit.
System Main Rly-Con 1
(Smr Cont1) / ON-OFF / l / l / l / l / Shows operating condition of system main relay No.1.
System Main Rly-Con 2
(Smr Cont2) / ON-OFF / l / l / l / l / Shows operating condition of system main relay No.2.
System Main Rly-Con 3
(Smr Cont3) / ON-OFF / l / l / l / l / Shows operating condition of system main relay No.3.
Discharge Rqst to SOC
(Dchg Rqst SOC) / W / l / l / - / - / Shows wattage value at the time of uniform on-board charging.
Item
(Tester Abbreviation) / Available
Units / THS II / Description
Prius / RX400h
Highlander HV / GS450h / Camry
HV
Skid Control ECU / Regenertive Brake Torq
(Regen Exec Torq) / N·m / l / l / - / l / Shows MG2 regenerative brake torque execution.
(Executed torque value is sent to the skid control ECU.)
Rqst Regen Brake Torq
(Regen Rqst Torq) / N·m / l / l / - / l / Shows regenerative brake requested torque (for MG2), which is calculated by the skid control ECU.
(The skid control ECU makes the regenerative braking request.)
Rear Regen Brake Torq
(Rr Regen Exetrq) / N·m / - / l / l / - / Shows MGR regenerative brake torque execution.
(Executed torque value is sent to the skid control ECU.)
R Rqst Regen Brk Torq
(Rr Regen Rq Trq) / N·m / - / l / l / - / Shows regenerative brake requested torque (for MGR), which is calculated by the skid control ECU.