P1575

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1575: Warning Buzzer Malfunction
P1575 - Warning Buzzer Malfunction

DESCRIPTION

The brake booster with master cylinder (skid control ECU) receives an alarm demand signal from the hybrid vehicle control ECU and operates the skid control buzzer assembly. The buzzer sounds to warn that the distance between the vehicle in front and your own vehicle is decreasing.





HINT
If the vehicle ahead in the same lane significantly decreases its speed or another vehicle moves in front of your vehicle, adequate deceleration cannot be applied and the vehicle-to-vehicle distance will shorten. At this time, the system sounds the buzzer and the master warning light blinks to inform the driver. This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more CAN communication system DTCs are stored.

WIRING DIAGRAM





INSPECTION PROCEDURE

This DTC may be output by the electronically controlled brake system at the same time. In that case, perform troubleshooting for the electronically controlled brake system first How To Proceed With Troubleshooting.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (BUZZER)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS / VSC / TRAC / Active Test.

ABS/VSC/TRAC





(e) Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using the Techstream.

Result:





B -- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (SKID CONTROL BUZZER CIRCUIT) Electronically Controlled Brake System
A -- Continue to next step.

2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER

(a) Replace brake booster with master cylinder (skid control ECU) Removal.

NEXT -- Continue to next step.

3. READ OUTPUT DTC (DTC P1575)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs Dynamic Radar Cruise Control System.

(e) 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 - SET switch to activate the cruise control.

(f) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(g) Read the DTCs Dynamic Radar Cruise Control System.

Result:





B -- REPLACE HYBRID VEHICLE CONTROL ECU Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting