P1575

CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: P1575: Warning Buzzer Malfunction

DTC P1575 - Warning Buzzer Malfunction

DESCRIPTION

The ABS & traction actuator (skid control ECU) receives an alarm demand signal from the ECU and operates the skid control buzzer. 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 DTCs in the CAN communication system are output.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTE: When replacing the brake actuator assembly, perform zero point calibration Calibration.

PROCEDURE

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SKID CONTROL BUZZER)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the Active Test mode on the intelligent tester Data List / Active Test.

ABS / VSC:





(d) Check that the buzzer sounds or stops when turning the skid control buzzer on or off by using the intelligent tester.
Result:






B -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)
A -- Continue to next step.
2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)





(a) Turn the ignition switch off.
(b) Disconnect the skid control buzzer connector.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK -- Continue to next step.
3. INSPECT SKID CONTROL BUZZER





(a) Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.
OK:
The skid control buzzer sounds.
NG -- REPLACE SKID CONTROL BUZZER
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)





(a) Turn the ignition switch off.
(b) Disconnect the skid control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(d) Connect the connectors.
HINT: If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part Problem Symptoms Table.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY