Lexus ES manuals

Lexus ES: Brake Hydraulic Pressure Malfunction (C164F)

DESCRIPTION

When a malfunction signal sent from the skid control ECU via CAN communication is detected by the clearance warning ECU assembly, DTC C164F is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C164F

Brake Hydraulic Pressure Malfunction

Brake master cylinder brake fluid pressure abnormal

Electronically controlled brake system

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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  • After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).

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PROCEDURE

1.

CHECK DTC OUTPUT

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

HINT:

After turning the power switch from off to on (IG), wait 4 seconds or more before checking for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

(b) Clear the DTCs according to the screen on the Techstream.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(c) Recheck for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

HINT:

  • DTC C164F is stored when a malfunction signal sent from the electronically controlled brake system is detected.
  • If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C164F will not be output again.
  • If DTC C164F is output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.

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Result

Proceed to

DTC C164F is output

A

DTC C164F is not output

B

A

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

B

USE SIMULATION METHOD TO CHECK

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 Replacement

REPLACEMENT CAUTION / NOTICE / HINT NOTICE: Perform fluid replacement with the shift lever in P and the parking brake applied. Perform fluid replacement while maintaining the brake fluid level between the MAX and MIN lines on the brake fluid reservoir. If the No. 1 brake a

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