Nissan Rogue manuals

Nissan Rogue Service Manual: P1805 brake switch

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition
P1805 BRAKE SW/CIRCUIT (BRAKE SW/CIRCUT) A stop lamp switch signal is not sent to ECM for extremely long time while the vehicle is driving.

POSSIBLE CAUSE

FAIL-SAFE ECM controls the electric throttle control actuator by regulating the throttle opening to a small range. Therefore, acceleration will be poor.

Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration

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.
  4.  Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-418, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.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.

Check stop lamp switch power supply circuit

Is the inspection result normal? YES >> GO TO 2.

NO >> Perform the trouble diagnosis for power supply circuit.

2.CHECK STOP LAMP SWITCH GROUND CIRCUIT

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

Check stop lamp switch ground circuit

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

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace error-detected parts.

3.CHECK STOP LAMP SWITCH

Check the stop lamp switch. Refer to EC-412, "Component Inspection (Stop Lamp Switch)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-41, "Intermittent Incident".

NO >> Replace stop lamp switch. Refer to BR-20, "Exploded View".

Component Inspection (Stop Lamp Switch)

1.CHECK STOP LAMP SWITCH-1

  1.  Turn ignition switch OFF.
  2.  Disconnect stop lamp switch harness connector.
  3.  Check the continuity between stop lamp switch terminals as per the following conditions.

Check stop lamp switch-1

Is the inspection result normal? YES >> INSPECTION END

NO >> GO TO 2.

2.CHECK STOP LAMP SWITCH-2

  1. Adjust stop lamp switch installation. Refer to BR-15, "Adjustment".
  2.  Check the continuity between stop lamp switch terminals as per the following conditions.

Check stop lamp switch-2

Is the inspection result normal? YES >> INSPECTION END

NO >> Replace stop lamp switch. Refer to BR-20, "Exploded View".

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