P1805
DTC P1805 BRAKE SWITCHComponent 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-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.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to "Diagnosis Procedure".
Wiring Diagram
EC-BRK/SW-01:
Diagnosis Procedure
ICC MODELS
Step 1-3:
Step 3 (Continued)-7:
Step 7 (Continued)-9:
ASCD MODELS
Step 1-3:
Step 3 (Continued)-7:
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 following conditions.
4. If NG, adjust stop lamp switch installation, refer to BR-6, Adjustments and perform step 3 again.
ICC BRAKE HOLD RELAY
1. Check continuity between ICC brake hold relay terminals 3 and 5 under the following conditions.
2. If NG, replace ICC brake hold relay.