P1575

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

DTC P1575 - Warning Buzzer Malfunction

DESCRIPTION

The skid control ECU receives an alarm demand signal from the ECM 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 VSC actuator assembly, perform zero point calibration Programming and Relearning.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Select the Active Test mode and operate the skid control buzzer using the Techstream.

ABS/VSC/TRAC





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

Result





B -- REPLACE VSC ACTUATOR ASSEMBLY
A -- Continue to next step.

2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)





(a) Disconnect the H5 buzzer connector.
(b) Turn the ignition switch to ON.
(c) 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) Disconnect the H5 buzzer connector.
(b) 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:
Skid control buzzer sounds.

NG -- REPLACE SKID CONTROL BUZZER ASSEMBLY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)





(a) Disconnect the A19 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)





(a) Disconnect the A19 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE VSC ACTUATOR ASSEMBLY