Lexus ES: On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY (for Gasoline Model)
HINT:
Using the GTS to perform the Utilities allows relays, VSVs and actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Utilities early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Utilities.
(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 following menus: Chassis / ABS/VSC/TRC / Utility.
(f) When the vehicle's tires are lifted off the ground and the Techstream is used to operate the electric parking brake, check the condition of the rear tires.
(g) According to the display on the tester, perform the Utility.
Chassis > Brake/EPB > Utility| Tester Display |
|---|
| EPB Control Switch |
| Tester Display | Condition of the Rear Tire |
|---|---|
| Lock | Lock |
| Release | Free |
If the result is not as specified, inspect the electric parking brake actuator.
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(h) Turn the engine switch on (IG), push the electric parking brake switch to the lock side for 1 second and check that the parking brake indicator light (red) illuminates.
(i) Pull the electric parking brake switch to the release side for 1 second and check that the parking brake indicator light (red) turns off.
(j) Also, check that the brake warning light / yellow (minor malfunction) does not illuminate at this time.
2. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY (for HV Model)
HINT:
Using the Techstream to perform the Active Tests allows relays, VSVs and actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Turn the power switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Electric Parking Brake / Active Test.
(f) When the vehicle's tires are lifted off the ground and the Techstream is used to operate the electric parking brake, check the condition of the rear tires.
(g) According to the display on the tester, perform the Active Test.
Chassis > Electric Parking Brake > Active Test| Tester Display |
|---|
| PKB Lock Control |
| Tester Display |
|---|
| PKB Release Control |
| Tester Display | Control Range | Condition of the Rear Tire |
|---|---|---|
| PKB Lock Control | ON | Lock |
| PKB Release Control | ON | Free |
If the result is not as specified, inspect the electric parking brake actuator.
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(h) Turn the power switch on (IG), push the electric parking brake switch to the lock side for 1 second and check that the parking brake indicator light (red) illuminates.
(i) Pull the electric parking brake switch to the release side for 1 second and check that the parking brake indicator light (red) turns off.
(j) Also, check that the brake warning light / yellow (minor malfunction) does not illuminate at this time.
READ NEXT:
Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. PRECAUTION Click here 2. RELEASE PARKING BR
Electric Parking Brake Switch
ComponentsCOMPONENTS ILLUSTRATION *1 ELECTRIC PARKING BRAKE SWITCH ASSEMBLY *2 LOWER INSTRUMENT PANEL *3 INSTRUMENT PANEL FINISH PANEL END - - InspectionINSPECTION PROCEDURE 1
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Parts Location
PARTS LOCATION ILLUSTRATION *1 FORWARD RECOGNITION CAMERA *2 FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY *3 BRAKE ACTUATOR ASSEMBLY - SKID CONTROL ECU *4 ECM ILLUSTRATION *1 STEERING SENSOR *2 AIRBAG ECU ASSEMBLY - YAW RATE SENSOR *3 MAIN BODY ECU (MULTIP
