Lexus ES: Brake System (P157800)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System (for Gasoline Model) / Brake System (P157800)

DESCRIPTION

When a malfunction in the electronically controlled brake system is detected, DTC P157800 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from
P157800	Brake System	When the engine switch is on (IG) and the dynamic radar cruise control system is operating, a malfunction in the electronically controlled brake system is detected for 0.2 seconds or more.	Electronically controlled brake system	Does not come on	ECM

PROCEDURE

1.	GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

HINT:

If DTC P157800 is output by the dynamic radar cruise control system, perform troubleshooting for the electronically controlled brake system.

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END

SEE MORE:

Brake Switch "A" Circuit Short to Battery (P057112)

DESCRIPTION The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied. DTCs may be stored if either of the following occurs: Stop light switch assembly stuck on malfunction. The accelerator and bra

Data List / Active Test

DATA LIST / ACTIVE TEST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of switches,

Lexus ES: Brake System (P157800)

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Data List / Active Test