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DTC P0504 ASCD BRAKE SWITCH
EC-1275
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P0504 ASCD BRAKE SWITCH PFP:25320
Component Description BBS00226
When the brake pedal is depressed, ASCD brake switch (1) and
stop lamp switch (2) are turned ON. ECM detects the state of the
brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-1454, "
AUTOMATIC SPEED CONTROL DEVICE
(ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor Mode BBS00227
Specification data are reference values.
On Board Diagnosis Logic BBS00228
This self-diagnosis has the one trip detection logic.
The MI will not light up for this diagnosis.
PBIB2882E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW
(Stop lamp switch)
● Ignition switch: ON
Brake pedal: Fully released OFF
Brake pedal: Slightly
depressed
ON
BRAKE SW2
(ASCD brake switch)
● Ignition switch: ON
Brake pedal and clutch pedal:
Fully released
OFF
Brake pedal and/or clutch
pedal: Slightly depressed
ON
DTC No.
Trouble Diagnosis
Name
DTC Detecting Condition Possible Cause
P0504
0504
ASCD brake switch
● When the vehicle speed is above 5 km/h (3
MPH), ON signal from the stop lamp switch
and OFF signal from the ASCD brake
switch are sent to the ECM at the same
time.
● Harness or connectors
(The stop lamp switch circuit is open or
shorted.)
● Harness or connectors
(The ASCD brake switch circuit is open or
shorted.)
● Harness or connectors
(The ASCD clutch switch circuit is open or
shorted.)
● Stop lamp switch
● ASCD brake switch
● ASCD clutch switch
● Incorrect stop lamp switch installation
● Incorrect ASCD brake switch installation
● Incorrect ASCD clutch switch installation
● ECM
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