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EC-408
[QR (WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
DTC P1805 BRAKE SWITCH PFP:25320
Description BBS001IR
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
CONSULT-II Reference Value in Data Monitor Mode BBS001IS
Specification data are reference values.
On Board Diagnosis Logic BBS001IT
The MI will not light up for this self-diagnosis.
FAIL-SAFE MODE BBS001IU
When the malfunction is detected, the ECM enters in fail-safe mode.
DTC Confirmation Procedure BBS001IV
WITH CONSULT-II
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-II.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. If 1st trip DTC is detected, go to EC-410, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW
● Ignition switch: ON
Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805
1805
Brake switch
A brake switch signal is not sent to ECM for
extremely long time while the vehicle is driv-
ing.
● Harness or connectors
(Stop lamp switch circuit is open or shorted.)
● Stop lamp switch
Engine operation condition in fail-fail safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.Therefore,acceleration will be
poor.
Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
PBIB1952E
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