Nissan Murano: Dtc/circuit Diagnosis / P1805 Brake Switch

Nissan Murano (Z52) 2015-2024 Service Manual / Engine / Engine Control System :: Vq35de / Dtc/circuit Diagnosis / P1805 Brake Switch

DTC Description

DESCRIPTION

Brake switch signal is applied to the ECM via the stop lamp switch when the brake pedal is depressed. This signal is used mainly to decrease the engine speed when the Nissan Murano vehicle is driven.

DTC DETECTION LOGIC

A brake switch signal is not sent to ECM for extremely long time while the vehicle is driving.

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P1805

BRAKE SW/CIRCUIT

(Stop lamp switch circuit) 		Diagnosis condition —
Signal (terminal) Stop lamp switch signal
Threshold A brake switch signal is not sent to ECM while the Nissan Murano vehicle is driving
Diagnosis delay time Extremely long time

POSSIBLE CAUSE

  • Harness or connectors

    (Stop lamp switch circuit is open or shorted.)

  • Stop lamp switch

FAIL-SAFE

Engine operating condition in fail-safe mode
Fail safe mode Nissan Murano Vehicle behavior
Brake switch

ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.

Therefore, acceleration will be poor.
Nissan Murano Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
DTC Confirmation Procedure

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.

  4. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Go to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK STOP LAMP SWITCH CIRCUIT

  1. Turn ignition switch OFF.

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

    Brake pedal Stop lamp
    Fully released Not illuminated
    Slightly depressed Illuminated

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 2.

CHECK STOP LAMP SWITCH SIGNAL CIRCUIT-I

  1. Turn ignition switch OFF.

  2. Remove stop lamp switch.

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

    + − Voltage
    Stop lamp switch
    Connector Terminal
    E38 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK STOP LAMP SWITCH SIGNAL CIRCUIT-II

  1. Check the continuity between stop lamp switch harness connector and ECM harness connector.

    Stop lamp switch ECM Continuity
    Connector Terminal Connector Terminal
    E38 2 E32 139 Existed

  2. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK STOP LAMP SWITCH

Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch) .

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace stop lamp switch. Refer to Removal and Installation.

Component Inspection (Stop Lamp Switch)

CHECK STOP LAMP SWITCH-I

  1. Turn ignition switch OFF.

  2. Disconnect stop lamp switch harness connector.

  3. Check harness continuity between stop lamp switch terminals under the following conditions.

    Terminals Condition Continuity
    1 and 2 Brake pedal Fully released Not existed
    Slightly depressed Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 2.

CHECK STOP LAMP SWITCH-II

  1. Adjust stop lamp switch installation. Refer to Adjustment.

  2. Check harness continuity between stop lamp switch terminals under the following conditions.

    Terminals Condition Continuity
    1 and 2 Brake pedal Fully released Not existed
    Slightly depressed Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace stop lamp switch. Refer to Removal and Installation.

    P1800 Vias Control Solenoid Valve 1

    DTC Description DTC DETECTION LOGICAn excessively low or high voltage signal is sent to ECM through the VIAS control solenoid valve 1. DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P1800 VIAS S/V CIRC-B1 (VIAS solenoid valve circuit bank 1) Diagnosis condition Start engine and let it idle Signal (terminal) VIAS control solenoid valve 1 signal Threshold An excessively low or high voltage signal is sent to ECM Diagnosis delay time — POSSIBLE CAUSE Harness or connectors (Input speed sensor circuit is open or shorted) VIAS control solenoid valve 1 FAIL-SAFENot applicable DTC Confirmation Procedure CONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test...

    P2096 A/f Sensor 1

    DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P2096 POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim system too lean bank 1) Diagnosis condition — Signal (terminal) — Threshold The output voltage computed by ECM from the A/F sensor 1 signal is shifts to the lean side for a specified period Diagnosis delay time — P2097 POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim system too rich bank 1) Diagnosis condition — Signal (terminal) — Threshold The A/F signal computed by ECM from the A/F sensor 1 signal is shifts to the rich side for a specified period Diagnosis delay time — P2098 POST CAT FUEL TRIM SYS B2 (Post catalyst fuel trim system too lean bank 2) Diagnosis condition — Signal (terminal) — Threshold The output voltage computed by ECM from the A/F sensor 1 signal is shifts to the lean side for a specified period Diagnosis delay time — P2099 POST CAT FUEL TRIM SYS B2 (Post catalyst fuel trim system too rich bank 2) Diagnosis condition — Signal (terminal) — Threshold The A/F signal computed by ECM from the A/F sensor 1 signal is shifts to the rich side for a specified period Diagnosis delay time — POSSIBLE CAUSEDTC P2096 A/F sensor 1 (bank 1) A/F sensor 1 heater Heated oxygen sensor 2 (bank 1) Fuel pressure Fuel injector Intake air leaks Exhaust gas leaks DTC P2097 A/F sensor 1 (bank 1) A/F sensor 1 heater Heated oxygen sensor 2 (bank 1) Fuel pressure Fuel injector Intake air leaks Exhaust gas leaks DTC P2098 A/F sensor 1 (bank 2) A/F sensor 1 heater Heated oxygen sensor 2 (bank 2) Fuel pressure Fuel injector Intake air leaks Exhaust gas leaks DTC P2099 A/F sensor 1 (bank 2) A/F sensor 1 heater Heated oxygen sensor 2 (bank 2) Fuel pressure Fuel injector Intake air leaks Exhaust gas leaks FAIL-SAFENot applicable DTC Confirmation Procedure PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test...

    Other information:

    Nissan Murano (Z52) 2015-2024 Service Manual: B1383 Incomp Steering Angle Sensor Adjust


    DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detection condition B1383–01 Incomp steering angle senor adjust (Steering angle sensor calibration) Diagnosis condition When ignition switch is ON...

    Nissan Murano (Z52) 2015-2024 Service Manual: Theft Alm


    CONSULT Function (BCM - THEFT ALM) ECU IDENTIFICATIONThe BCM part number is displayed.SELF DIAGNOSTIC RESULTRefer to DTC Index.DATA MONITOR Monitor Item Description REQ SW -DR [On/Off] Indicates condition of door request switch LH. REQ SW -AS [On/Off] Indicates condition of door request switch RH...

    Categories

    Vehicle security system

    Nissan Murano. Vehicle security system

    Your vehicle has two types of security systems:

    Vehicle security system NISSAN Vehicle Immobilizer System

    The vehicle security system provides visual and audible alarm signals if someone opens the doors, liftgate or the hood when the system is armed. It is not, however, a motion detection type system that activates when a vehicle is moved or when a vibration occurs.

    read more

     
    Copyright © 2026 www.nimurano.com