Dtc Description

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

  • Direct fuel injector circuit is shorted

• Battery power supply

• ECM (direct injector driver unit)

• direct fuel injector

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. Note: ECM does not control the accelerator pedal releasing speed.
Device fix mode		This mode fixes the EVT control solenoid valve in the reference position. The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

Confirmation Procedure

Confirmation Procedure

DTC CONFIRMATION PROCEDURE

1. 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.

   TESTING CONDITION:

   • Before performing the following procedure, confirm that battery voltage is between 12 - 15 V at idle.

   >>

   GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start engine and let it idle for at least 20 seconds.

   2. Check 1st trip DTC.

   Is 1st trip DTC detected?

   YES >>

   Refer to DTC Diagnosis Procedure.

   NO-1 >>

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

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK DIRECT FUEL INJECTOR

   Check direct fuel injector. Refer to Component Function Check.

   Is inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair or replace error-detected parts.

2. PERFORM DTC CONFIRMATION PROCEDURE

   1. Turn ignition switch ON.

   2. Erase DTC.

   3. Perform DTC confirmation procedure again. Refer to Confirmation Procedure.

   4. Check 1st trip DTC.

   Is the DTC P0262 displayed again?

   YES >>

   Replace ECM. Refer to ECM : Removal & Installation.

   NO >>

   INSPECTION END