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DTC P1805 BRAKE SWITCH
EC-733
[QR (WITHOUT EURO-OBD)]
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EC
DTC P1805 BRAKE SWITCH PFP:25320
Description EBS01121
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 EBS01122
Specification data are reference values.
On Board Diagnosis Logic EBS01123
This self-diagnosis has the one trip detection logic.
FALI-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure EBS01124
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 DTC is detected, go to EC-736, "
Diagnostic Procedure" .
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
an extremely long time while the vehicle is
driving.
● Harness or connectors
(Stop lamp switch circuit is open or shorted.)
● Stop lamp switch
Engine operating condition in 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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