Lexus ES: 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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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
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
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
SEE MORE:
TERMINALS OF ECU CHECK HYBRID VEHICLE CONTROL ECU Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A32-15 (STP) - G59-6 (E1) GR - W-B Stop light switch signal Brake pedal depressed 11 to 14 V Brake pedal released 0 to 1.5 V A33-2
DESCRIPTION Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS control. The speed sensor detects the magnetic fields of the speed sensor rotor as it rotates and outputs a pulse signal. The frequency of the puls
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