P1805

DTC P1805 BRAKE SWITCH




Component Description
Brake switch signal is applied to the ECM through the stop lamp switch (1) when the brake pedal is depressed. This signal is used mainly to decrease the engine speed when the vehicle is driving.
- ICC brake switch (models with ICC) (2)
- ASCD brake switch (models with ASCD) (2)




CONSULT-II Reference Value in Data Monitor Mode




On Board Diagnosis Logic




FAIL-SAFE MODE

DTC Confirmation Procedure

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 "Diagnostic Procedure".

WITH GST
Follow the procedure "WITH CONSULT-II".

EC-BRK/SW-01:

Wiring Diagram

Diagnostic Procedure

Step 1-2:

Step 3:

Step 4-9:

ICC MODELS

Step 1-3:

Step 4-7:

ASCD MODELS

Component Inspection

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




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

ICC BRAKE HOLD RELAY




1. Check continuity between ICC brake hold relay terminals 3 and 5 under the given conditions.
2. If NG, replace ICC brake hold relay.