Lexus ES: On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT BRAKE BOOSTER ASSEMBLY
(a) Airtightness check
| (1) Start the engine and stop it after 1 or 2 minutes. Slowly depress the brake pedal several times. HINT: If the brake pedal can be depressed nearly to the floor the first time, but on the 2nd and 3rd time cannot be depressed as far, the brake booster assembly is airtight. |  | | *a | Correct | | *b | Incorrect | | *c | 1st | | *d | 2nd | | *e | 3rd | | |
(2) Depress the brake pedal with the engine running, and stop the engine with the brake pedal depressed.
HINT:
If there is no change in the brake pedal reserve distance while holding the brake pedal depressed for 30 seconds, the brake booster assembly is airtight.
(b) Operation check
| (1) Depress the brake pedal several times with the engine switch off and check that there is no change in the brake pedal reserve distance when the brake pedal is depressed. | |
| (2) Depress and hold the brake pedal, then start the engine. HINT: If the brake pedal goes down slightly, operation is normal. | |
READ NEXT:
REASSEMBLY PROCEDURE 1. INSTALL VACUUM WARNING SWITCH ASSEMBLY (a) Install a new check valve grommet to the brake booster assembly. (b) Install the vacuum warning switch assembly to the brake booster
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during brak
SEE MORE:
The following procedures may be
used to start the hybrid system if the
12-volt battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.
Restarting the hybrid system
If you have a set of jumper (or booster)
cables and a second vehicle with a 12-
volt battery, y
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during rear stabilizer bar removal/installation are shown below. Necessary Procedures After Parts Removed/Inst
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