Lexus ES: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Symptom | Suspected Area | Link |
Tight-corner braking phenomenon* | Linear solenoid circuit | |
Steering sensor circuit | |
Brake control system | |
4WD ECU assembly | |
AWD warning message remains displayed | AWD warning circuit | |
AWD warning message is not displayed | AWD warning circuit | |
HINT:
*: Tight corner braking phenomenon: a phenomenon in which an AWD vehicle may lurch and decelerate due to a rotational speed difference between the front and rear wheels, such as during low-speed cornering in AWD mode.
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TERMINALS OF ECU CHECK 4WD ECU ASSEMBLY (a) Measure the voltage and resistance of the connector. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G
DESCRIPTION The 4WD ECU assembly inputs the signals sent from the ECM, skid control ECU (brake actuator assembly) and steering sensor via CAN communication. When DTCs indicating a CAN communication sy
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ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: To avoid the danger of being burned, do not remove the reserve tank cap while the coolant (for inverter) is still hot. Pressurized, hot coolant (for inverter) and steam may be released and cause serious burns. PROCEDURE 1. INSPECT FOR COOLANT L
REPLACEMENT CAUTION / NOTICE / HINT CAUTION: To avoid the danger of being burned, do not remove the reserve tank cap or drain cock plug while the coolant (for inverter) is still hot. Pressurized, hot coolant (for inverter) and steam may be released and cause serious burns. *1 Reserve Tank Cap
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