Lexus ES: Problem Symptoms Table
Lexus ES (XZ10) Service Manual / Brake / Parking Brake / Electric Parking Brake System (for Hv Model) / 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 |
|---|---|---|
| Electric parking brake does not operate | Proceed to "Electric Parking Brake does not Operate" | |
| Parking brake indicator light does not illuminate (red) or turn off when parking brake is manually engaged and disengaged | Proceed to "Electric Parking Brake does not Operate" | |
| Electric parking brake AUTO function (shift-linked function) does not operate (shift-linked parking brake does not lock or release) | Proceed to "Electric Parking Brake System AUTO Function Circuit" | |
| Message not displayed on multi-information display when AUTO function set to ON/OFF | Proceed to "Message Not Displayed on Multi-Information Display When AUTO Function Set to ON/OFF" | |
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System Diagram
SYSTEM DIAGRAM
Terminals Of Ecu
TERMINALS OF ECU CHECK PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY) *a Front view of wire harness connector (to Parking Brake ECU (Brake Actuator Assembly)) - - (a) Disconnect the A54 park
Test Mode Procedure
TEST MODE PROCEDURE *1 Rear Disc Brake Piston *2 Nut *a The nut moves inward in pad replacement mode REAR BRAKE PAD REPLACEMENT MODE HINT: When replacing the rear disc brake pad a
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Precaution
PRECAUTION PRECAUTIONS FOR INSPECTING POWER SOURCE FOR MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Lane Control System (for
Camshaft Position Sensor "A" Circuit Bank 1 or Single Sensor (P034000,P034031)
DESCRIPTION If the cam position signal pulse sent from the ECM via a direct line is abnormal, the motor generator control ECU (MG ECU) (built into the inverter with converter assembly) stores DTC P034000 or P034031. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning
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