P1805

DTC P1805 BRAKE SWITCH

Description
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-III Reference Value in Data Monitor Mode




On Board Diagnosis Logic




FAIL-SAFE MODE

DTC Confirmation Procedure
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-III.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-BRK/SW-01:

Wiring Diagram

Step 1-2:

Step 3-6:

Diagnostic Procedure

Component Inspection

STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.




3. Check continuity between stop lamp switch terminals 1 and 2 under the given conditions.
If NG, adjust stop lamp switch installation, refer to "BRAKE PEDAL", and perform step 3 again.