Nissan Murano: Dtc/circuit Diagnosis / P2297 Air Fuel Ratio Sensor 1

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

Air fuel ratio(A/F) sensor 1 bank1

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine and warm it up to normal operating temperature.

2. Drive the Nissan Murano vehicle a 80 km/h (50 MPH), with selecting suitable gear.

   NOTE:

   Always keep safe driving to the first priority.

3. Release accelerator pedal completely to decelerate the Nissan Murano vehicle for more than 10 seconds.

   NOTE:

   Always keep safe driving to the first priority.

4. Check 1st trip DTC.

Is 1st trip DTC detected?

Refer to DTC Diagnosis Procedure.

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

Confirmation after repair: INSPECTION END

CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY

1. Disconnect A/F sensor 1 harness connector.

2. Turn ignition switch ON.

3. Check the voltage between A/F sensor 1 harness connector and ground.

   A/F sensor 1			Ground	Voltage
   Bank	Connector	Terminal
   1	F12	1	Ground	Battery voltage

Is the inspection result normal?

GO TO 3.

GO TO 2.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.

Is the inspection result normal?

Perform the trouble diagnosis for power supply circuit.

Repair or replace error-detected parts.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector .

   A/F sensor 1			ECM		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F12	3	F79	66	Existed
   		4		67

4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground.

   A/F sensor 1			Ground	Continuity
   Bank	Connector	Terminal
   1	F12	3	Ground	Not existed
   		4

   ECM		Ground	Continuity
   Connector	Terminal
   F79	66	Ground	Not existed
   	67

5. Also check harness for short to power.

Is the inspection result normal?

INSPECTION END

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