DTC Confirmation Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
If DTC P0116 is displayed with DTC P0117 or P0118, first perform the confirmation procedure (trouble diagnosis) for DTC P0117 or P0118.

Is DTC P0117 or P0118 detected?

YES

Perform diagnosis of applicable.
- DTC P0117: Refer to DTC Description .
- DTC P0118: Refer to DTC Description .
NO

GO TO 2.
INSPECTION START
Is it necessary to erase permanent DTC?

YES

GO TO 4.

NO

GO TO 3.

PERFORM COMPONENT FUNCTION CHECK

NOTE: Use the component function check to check the overall function of the ECT sensor circuit. During this check, a 1st trip DTC might not be confirmed.

Turn ignition switch OFF.
Disconnect ECT sensor harness connector.
Remove ECT sensor. Refer to Exploded View .

Check resistance between ECT sensor terminals by heating with hot water as shown in the figure.

Courtesy of NISSAN NORTH AMERICA, INC.

ECT sensor		Condition		Resistance
Terminal
1	2	Temperature [ deg.C (deg.F)]	20 (68)	2.10 - 2.90 kOhm
			50 (122)	0.68 - 1.00 kOhm
			90 (194)	0.236 - 0.260 kOhm

Is the inspection result normal?

YES

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

YES

Confirmation after repair: INSPECTION END

Proceed to Diagnosis 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.
TEST CONDITION:
- Before performing the following procedure, do not add fuel.
- Before performing the following procedure, check that fuel level is between 1/4 and 4/4.
- Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
GO TO 5.
PERFORM DTC CONFIRMATION PROCEDURE
1. Move the vehicle to a cool place.
  NOTE: Cool the vehicle in an environment of ambient air temperature between -10 deg.C (14 deg.F) and 35 deg.C (95 deg.F).
2. Turn ignition switch OFF and leave the vehicle for 12 hours.
  CAUTION: Never turn ignition switch ON during this procedure.
  
  NOTE: The vehicle must be cooled with the hood open.
3. Start engine and let it idle for 20 minutes or more.
  CAUTION: Never turn ignition switch OFF during idling.
4. Check 1st trip DTC.
Is DTC P0116 detected?

YES

Proceed to Diagnosis Procedure .

NO

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

NO

Confirmation after repair: INSPECTION END