Lexus ES: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.
- Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Heavy steering | Check assist limit record | |
| Front tires (improperly inflated, unevenly worn) | | |
| Front wheel alignment (incorrect) | | |
| Front suspension (Lower ball joint) | | |
| Rack and pinion power steering gear assembly | | |
| Steering effort differs between right and left or is uneven | Rotation angle sensor initialization and torque sensor zero point calibration incomplete | |
| Front tires (improperly inflated, unevenly worn) | | |
| Front wheel alignment (incorrect) | | |
| Front suspension (Lower ball joint) | | |
| Rack and pinion power steering gear assembly | | |
| Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column) | | |
| Steering column assembly (for Power Tilt and Power Telescopic Steering Column) | | |
| While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily | Skid control ECU (Brake actuator assembly) | |
| Speed sensor | | |
| Rack and pinion power steering gear assembly | | |
| CAN communication system | | |
| Friction sounds occur when turning steering wheel during low speed driving | Rack and pinion power steering gear assembly | |
| Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column) | | |
| Steering column assembly (for Power Tilt and Power Telescopic Steering Column) | | |
| Spiral cable with sensor sub-assembly | | |
| Steering column cover contacting steering wheel assembly (for Manual Tilt and Manual Telescopic Steering Column) | | |
| Steering column cover contacting steering wheel assembly (for Power Tilt and Power Telescopic Steering Column) | | |
| High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped | Rack and pinion power steering gear assembly | |
| Steering wheel installation (incorrect) | | |
| Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock | Rack and pinion power steering gear assembly | |
| Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column) | | |
| Steering column assembly (for Power Tilt and Power Telescopic Steering Column) | | |
| Steering wheel installation (incorrect) | | |
| Drive mode does not change | Drive mode select switch circuit | |
| EPS warning light remains on | EPS warning light circuit | |
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Terminals Of Ecu
TERMINALS OF ECU TERMINALS OF ECU *a Component without harness connected (Rack and Pinion Power Steering Gear Assembly) - - HINT:
The rack and pinion power steering gear assembly uses
Diagnosis System
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here CHECK WARNING LIGHT (a) When a problem occurs in the power steering system, the EPS warning light in the combination meter assembly comes o
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTCs (USING TECHSTREAM) (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techstream on. (e) Enter the fo
SEE MORE:
Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure (P0E0028,...,P0E0828)
DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that the current sensor value is abnormal. The cause of this malfunction may be one of the following: Internal inverter malfunction
Current sensor malfunction
Inverter with converter assembly internal circuit malfunction
DESCRIPTION The
Cylinder 1 Injector "B" Circuit Open (P21CF13,P21D013-P21D213)
DESCRIPTION The D-4S system has two injection systems. One is an in-cylinder direct injection system that directly injects pressurized fuel into the combustion chamber. The other is an intake port injection system. The ECM determines the percentage of direct injection and port injection necessary in
