DESCRIPTION This DTC is
stored when a malfunction is detected in the vehicle stability control
system. Check the vehicle stability control system when DTC P1578 is
stored. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area | |
P1578 | Brake System |
While
the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar
cruise control system is operating, a malfunction in the vehicle
stability control system is detected for 0.2 seconds or more. |
- Vehicle stability control system
- Skid control ECU (brake actuator assembly)
- ECM
| CAUTION / NOTICE / HINT
NOTICE:
- Before replacing the ECM, refer to Registration.
Click here 
- First check the CAN communication system by following How to Proceed
with Troubleshooting. After checking that there are no malfunctions in
the CAN communication system, proceed with troubleshooting
Click here
PROCEDURE |
1. | CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) |
(a) Check for DTCs. Click here
|
Result | Proceed to | |
DTCs are not output | A | |
Vehicle stability control system DTCs are output |
B |
| B |
 | GO TO VEHICLE STABILITY CONTROL SYSTEM |
|
A |
 | |
| 2. |
CHECK FOR DTCs (RADAR CRUISE1) | (a) Clear the DTCs.
Click here (b) 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.
- Drive the vehicle at a speed for which dynamic radar cruise control operation is possible.
- Turn the cruise control system on using the cruise control main switch (ON-OFF button).
- Drive the vehicle at 36 km/h (22 mph) or more for 0.2 seconds or more.
(c) Check for DTCs. Click here
|
Result | Proceed to | |
DTC P1578 is not output |
A | | DTC P1578 is output |
B |
| A |
| USE SIMULATION METHOD TO CHECK |
|
B | |
| |
(a) Replace the ECM.
for 1UR-FE: Click here for 3UR-FE: Click here
for 3UR-FBE: Click here
|
NEXT | |
| |
| 4. |
CHECK FOR DTCs (RADAR CRUISE1) | (a) Clear the DTCs.
Click here (b) 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.
- Drive the vehicle at a speed for which dynamic radar cruise control operation is possible.
- Turn the cruise control system on using the cruise control main switch (ON-OFF button).
- Drive the vehicle at 36 km/h (22 mph) or more for 0.2 seconds or more.
(c) Check for DTCs. Click here
|
Result | Proceed to | |
DTC P1578 is not output |
A | | DTC P1578 is output |
B |
| A |
| END |
| B |
| REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) | | 
