ASCD Brake Switch
P1572 ASCD BRAKE SWITCHDescription
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-56, "System Description" Automatic Speed Control Device (ASCD) for the ASCD function.
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC-336, "DTC Logic". P0605
- This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed. 1st trip DTC is erased when ignition switch OFF. And even when malfunction A is detected in two consecutive trips, DTC is not stored in ECM memory.
DTC CONFIRMATION PROCEDURE
Step 1-2:
Step 2 (Continued)-3:
Diagnosis Procedure
Step 1-2:
Step 2 (Continued)-6:
Step 6 (Continued)-13:
Component Inspection (ASCD Brake Switch)
Step 1-2:
Component Inspection (Stop Lamp Switch)
