DTC P1578: Brake System Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
5. Read the DTCs. Refer to DTC CHECK/CLEAR [08/2012 - ] .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   4 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK/CLEAR [08/2012 - ] .
5. Perform the following to make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the malfunction cannot be detected.

   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 cruise control main switch to -SET to activate the cruise control.
6. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
7. Read the DTCs. Refer to DTC CHECK/CLEAR [08/2012 - ] .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC P1578 is output (for 2GR-FSE)	B
   DTC P1578 is output (for 4GR-FSE)	C

B → See step   5 

C → See step   6 

A → See step   3