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 CodesHINT:
- 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.
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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 | .gif) | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
| B | | USE SIMULATION METHOD TO CHECK |
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Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever DTCs are detected, the blind spot monitor sensor stores the current vehicle (sensor) state as freeze frame data. CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the blind spot monitor system
Utility
UTILITY NOTICE:
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