Dtc P1578 Brake System Malfunction

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
Cruise Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)

DTC P1578 Brake System Malfunction


DESCRIPTION

This DTC may also be stored when there is a vehicle stability control system malfunction.

DTC Code
DTC Detection Condition
Trouble Area
P1578
During cruise control operation (vehicle-to-vehicle distance control mode), the brake system malfunctions.
  1. Vehicle stability control system
  2. ECM

INSPECTION PROCEDURE

NOTICE:
This DTC code may be output under the vehicle stability control system at the same time. In that case, perform troubleshooting for the vehicle stability control system first.
1.CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

  1. Using the intelligent tester, enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Code.

  1. Check for DTCs (Click here).

    OK:
    DTC is not output.


NG
GO TO VEHICLE STABILITY CONTROL SYSTEM (Click here)
OK


2.CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)

  1. Using the intelligent tester, enter the following menus: Powertrain / Radar Cruise / Trouble Code.

  1. Clear the DTCs (Click here).

  1. Perform the following to make sure the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.

    1. Drive the vehicle at a speed of 50 km/h (30 mph) or more.

    2. Turn the cruise control main switch on.

    3. Push the -SET switch to activate the dynamic radar cruise control.

  1. Check for DTCs (Click here).

    OK:
    DTC P1578 is not output.
Result
Result
Proceed to
OK
A
NG (for 1UR-FE)
B
NG (for 3UR-FE)
C


B
REPLACE ECM (Click here)

C
REPLACE ECM (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)