Lexus ES: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
Hybrid Battery System| Symptom | Suspected Area | Link |
|---|---|---|
| "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display.* | 1. Make sure the HV battery cooling system intake port is not blocked. | - |
| 2. Make sure there are no gaps between the connecting parts of the ducts. | - | |
| 3. Clean the No. 1 HV battery intake filter. Check for entry of foreign matter. | | |
| 4. Clear the DTCs to reset the learning values even if no DTCs are stored. | | |
| Abnormal sound is heard from the area around the No. 1 hybrid battery intake duct. | 1. Make sure the HV battery cooling system intake port is not blocked. | - |
| 2. Make sure there are no gaps between the connecting parts of the ducts. | - | |
| 3. Clean the No. 1 HV battery intake filter. Check for entry of foreign matter. | | |
| 4. Clear the DTCs to reset the learning values even if no DTCs are stored. | | |
| "Have Traction Battery Inspected" is displayed on the multi-information display. | "Have Traction Battery Inspected" is displayed. | |
| Power switch does not turn on (READY). | Smart Access System with Push-Button Start (for Start Function) | |
| ECU Power Source Circuit (Hybrid Battery System) | | |
| ECU Power Source Circuit (Hybrid Control System) | | |
| Check Vehicle Control History (Ready ON Prevention) | | |
| The power switch is slow to turn on (READY). | Check Vehicle Control History (Ready ON Prevention) | |
| Engine stops and starts less frequently. | Check Vehicle Control History (Limit to Charge / Discharge Control Value by Hybrid/EV Battery) | |
| Engine speed returns to idle slowly after accelerator pedal is fully released. | Check Vehicle Control History (Limit to Charge / Discharge Control Value by Hybrid/EV Battery) | |
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*: If the battery cooling blower assembly malfunctions, DTC P0A8111, P0A8115 or P0A8196 will be stored. If only "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, perform the inspection of the HV battery cooling system intake port, filter and duct.
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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)
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
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Left Rear Wheel Speed Sensor Circuit Intermittent (C050C1F)
DESCRIPTION Refer to DTC C050C12 Click here DTC No. Detection Item DTC Detection Condition Trouble Area C050C1F Left Rear Wheel Speed Sensor Circuit Intermittent
The speed sensor signal is excessively noisy.
The calculated change in wheel speed is more than 980 m/s2 for 5*1 o
System Diagram
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line Main Body ECU (Multiplex Network Body ECU) Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)
Sliding roof operation permission signal
IG signal
Front door courtesy light switch assembly signal
Key-linked
