Nissan Altima 2007-2012 Service Manual: 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.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE


DTC CONFIRMATION PROCEDURE

1.PERFORM 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.

Is 1st trip DTC detected? YES >> Go to EC-406, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK STOP LAMP SWITCH CIRCUIT

1. Turn ignition switch OFF.

2. Check the stop lamp when depressing and releasing the brake pedal.

Is 1st trip DTC detected?


Is 1st trip DTC detected? YES >> GO TO 4.

NO >> GO TO 2.

2.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

3. Check the voltage between stop lamp switch harness connector and ground.


Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 4.

NO >> GO TO 3.

3.DETECT MALFUNCTIONING PART

Check the following.

    P1715 input speed sensor (primary speed sensor)
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    P2004 tumble control valve
    Description Tumble control valve (3) is installed in the intake manifold adapter (1). Tumble control valve actuator (2) is connected to the front end of the valve shaft. Tumble control valve ...

    Other materials:

    Avoiding collision and rollover
    WARNING Failure to operate this vehicle in a safe and prudent manner may result in loss of control or an accident. Be alert and drive defensively at all times. Obey all traffic regulations. Avoid excessive speed, high speed cornering, or sudden steering maneuvers, because these driving practi ...

    Sun visors
    1 To block glare from the front, swing down the main sun visor. 2 To block glare from the side, remove the main sun visor from the center mount and swing the visor to the side. 3 To extend (if so equipped) the sun visor, slide in or out as needed. CAUTION ● Do not store the sun visor ...

    Vehicle information display warnings and indicators
    1. No Key Detected 2. Key ID Incorrect 3. Shift to Park 4. Push ignition to OFF 5. Key Battery Low 6. Engine start operation for Intelligent Key system 7. Release parking brake 8. Low Fuel 9. Low Washer Fluid 10. Door Open 11. Trunk Open 12. Timer Alert – Time for a driver break? 13 ...