Lexus ES: Precaution
PRECAUTION
PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL
NOTICE:
When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following system(s) after the cable is reconnected.
| System | See Procedure |
|---|---|
| Lane Control System (for HV Model) | |
| Parking Support Brake System (for HV Model) | |
| Parking Assist Monitor System (for HV Model) | |
| Panoramic View Monitor System (for HV Model) | |
| Pre-collision System (for HV Model) | |
| Power Trunk Lid System (for HV Model) | |
| Lighting System (for HV Model) |
TROUBLESHOOTING PRECAUTIONS
(a) When inspecting the rear brakes, disconnect the connector or disconnect the cable from the negative (-) auxiliary battery terminal in order to shut off the supply of electrical power.
CAUTION:
- Do not perform the rear brake inspection while either the connector or the negative (-) auxiliary battery terminal are connected.
- The rear disc brake piston could operate, resulting in an accident such as hands being caught.
(b) The electric parking brake may still operate for 20 seconds* after the power switch is turned off.
- *: The electric parking brake may still operate up to 60 minutes depending on the state of the vehicle after the power switch is turned off, so be sure to perform the work procedures with the vehicle on a level surface.
(c) When any parts have been removed or installed, check for DTCs after completion of installation to confirm that the system is operating correctly.
HINT:
After performing work procedures such as installation, if the parking brake indicator light (red) is blinking, the parking brake must be released.
HANDLING PRECAUTIONS
(a) When tilting the vehicle to perform work after parking the vehicle on a level surface, the braking force may not be sufficient. Make sure to push the electric parking brake switch assembly to the lock side 2 times (2 lock operations).
HINT:
- The electric parking brake system determines the amount of force used to operate the parking brake according to the tilt angle detected by the deceleration sensor (airbag ECU assembly).
- When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pushed to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pushed to the lock side one more time.
(b) The parking brake indicator light blinks (red) when the power switch is turned on (IG) after replacing the parking brake ECU (brake actuator assembly). Operate the electric parking brake switch assembly to turn off the parking brake indicator light (red).
PRECAUTIONS FOR TOWING VEHICLES
(a) For towing precautions: Click here .gif)
PARKING BRAKE FORCED RELEASE METHOD
(a) For the parking brake forced release method: Click here
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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
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
SEE MORE:
Power Steering ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Power Steering ECU Communication Stop Mode Any of the following conditions are met:
Communication stop for "Power Steering (EPS)" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication sto
Relay
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT WIPER RELAY (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 3 - 5 Auxiliary battery voltage not applied between terminals 1
