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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Cruise Control Input Processor (P160700)
DESCRIPTION When the ECM detects that it is not functioning normally, DTC P160700 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from P160700
Cruise Control Input Processor (P160700)
DESCRIPTION When the ECM detects that it is not functioning normally, DTC P160700 is stored. DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from P160700
Communication Error from VSC to ECM Invalid Serial Data Received (P163081)
DESCRIPTION The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. If an abnormal signal is detected, the ECM stores DTC P163081. DTC No. Detection
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Installation
INSTALLATION PROCEDURE 1. INSTALL STUD BOLT HINT: If a stud bolt is deformed or its threads are damaged, replace it. (a) Using an E8 "TORX" socket wrench, install the 2 stud bolts to the exhaust manifold assembly LH (TWC: Front Catalyst). Torque: 19.5 N·m {199 kgf·cm, 14 ft·lbf} 2
Short circuit in Power source circuit (C13A1)
DESCRIPTION C13A1 is stored if the power supply relay in the parking brake ECU assembly has a short circuit. C13A1 is stored if the power switch is off and a voltage of 2.5 V or higher is applied to the IG terminal and an electric parking brake switch assembly malfunction or wire harness malfunction
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