Lexus ES: Definition Of Terms
DEFINITION OF TERMS
| Term | Definition |
|---|---|
| Monitor description | Description of what the hybrid vehicle control ECU monitors and how it detects malfunctions (monitoring purpose and details). |
| Related DTCs | Group of diagnostic trouble codes that are output by the hybrid vehicle control ECU based on the same malfunction detection logic. |
| Typical enabling conditions | Preconditions that allow the hybrid vehicle control ECU to detect malfunctions. With all preconditions satisfied, the hybrid vehicle control ECU stores a DTC when the monitored value(s) exceeds the malfunction threshold(s). |
| Sequence of operation | The priority order that is applied to monitoring if multiple sensors and components are used to detect the malfunction. While one sensor is being monitored, the next sensor or component will not be monitored. |
| Required sensors/Components | The sensors and components that are used by the hybrid vehicle control ECU to detect malfunctions. |
| Frequency of operation | The number of times that the hybrid vehicle control ECU checks for malfunctions per driving cycle. "Once per driving cycle" means that the hybrid vehicle control ECU detects a malfunction only once during a single driving cycle. "Continuous" means that the hybrid vehicle control ECU detects a malfunction every time the enabling conditions are met. |
| Duration | The minimum time for which the hybrid vehicle control ECU must detect a continuous deviation in the monitored value(s) in order to store a DTC. Timing begins after the "typical enabling conditions" are met. |
| Typical malfunction thresholds | Value beyond which the hybrid vehicle control ECU will determine that there is a malfunction and stores a DTC. |
| MIL operation | MIL illumination timing after a malfunction is detected. "Immediate" means that the hybrid vehicle control ECU illuminates the MIL the instant the hybrid vehicle control ECU determines that there is a malfunction. "2 driving cycles" means that the hybrid vehicle control ECU illuminates the MIL if the same malfunction is detected again in the next driving cycle. |
| Component operating range | Normal operation range of sensors and solenoids under normal driving conditions. Use these ranges as a reference. The ranges cannot be used to judge if a sensor or solenoid is defective or not. |
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Parts Location
PARTS LOCATION ILLUSTRATION *1 MILLIMETER WAVE RADAR SENSOR ASSEMBLY *2 FORWARD RECOGNITION CAMERA *3 BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - SKID CONTROL ECU *4 BRAKE ACTUAT
System Diagram
SYSTEM DIAGRAM
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Before performing troubleshooting for the dynamic radar cruise control system, perform troubleshooting for the pre-collision system.
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*: Use the Techstre
SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered be
Hybrid/EV Battery Discharge Control Malfunction (P300000)
DESCRIPTION The hybrid vehicle control ECU alerts the driver and performs fail-safe control based on error signals received from the battery voltage sensor. This DTC is stored when the SOC (state of charge) of the HV battery has dropped excessively as a result of leaving shift lever in N, running ou
