P1805

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.

On Board Diagnosis Logic






FAIL-SAFE MODE






DTC Confirmation Procedure

WITH CONSULT-III
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 "Diagnosis Procedure".

WITH GST
Follow the procedure "WITH CONSULT-III" above.

Diagnosis Procedure

Step 1-2:

Step 2 (Continued)-6:

Component Inspection

STOP LAMP SWITCH




1. Disconnect stop lamp switch harness connector.




2. Check continuity between stop lamp switch terminals 3 and 4 under the following conditions.
3. If NG, adjust stop lamp switch installation, refer to BR-14, "Inspection and Adjustment", Adjustments and perform step 2 again.