Diagnosis 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 PRIMARY SPEED SENSOR POWER CIRCUIT

Turn ignition switch OFF.
Disconnect primary speed sensor connector.
Turn ignition switch ON.

Check voltage between primary speed sensor harness connector terminal and ground.

+		-	Voltage
Primary speed sensor
Connector	Terminal
F35	3	Ground	10 - 16 V

Is the inspection result normal?

YES

GO TO 2.

GO TO 6.

CHECK PRIMARY SPEED SENSOR GROUND CIRCUIT

Check continuity between primary speed sensor harness connector terminal and ground.

Primary speed sensor		--	Continuity
Connector	Terminal
F35	1	Ground	Existed

Is the inspection result normal?

YES

GO TO 3.

Repair or replace malfunctioning parts.

CHECK CIRCUIT BETWEEN PRIMARY SPEED SENSOR AND TCM (PART 1)

Turn ignition switch OFF.
Disconnect TCM connector.

Check continuity between primary speed sensor harness connector terminal and TCM harness connector terminal.

Primary speed sensor		TCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F35	2	F25	35	Existed

Is the inspection result normal?

YES

GO TO 4.

Repair or replace malfunctioning parts.

CHECK CIRCUIT BETWEEN PRIMARY SPEED SENSOR AND TCM (PART 2)

Check continuity between primary speed sensor harness connector terminal and ground.

Primary speed sensor		--	Continuity
Connector	Terminal
F35	2	Ground	Not existed

Is the inspection result normal?

YES

GO TO 5.

Repair or replace malfunctioning parts.

CHECK TCM INPUT SIGNALS

Connect all of disconnected connectors.
Lift the vehicle.
Start the engine.

Check frequency of primary speed sensor.

+		-	Condition	Frequency (Approx.)
TCM
Connector	Terminal
F25	35	Ground	Selector lever: "M1" position Vehicle speed: 20 km/h (12 MPH)	700 Hz Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

Replace primary speed sensor. Refer to Removal and Installation .

DETECT MALFUNCTIONING ITEMS
Check the following items:
- Harness open circuit or short circuit between ignition switch and IPDM E/R. Refer to Wiring Diagram - IGNITION POWER SUPPLY - .
- Harness open circuit or short circuit between IPDM E/R connector terminal 61 and primary speed sensor connector terminal 3.
- 10A fuse (No. 46, located in the IPDM E/R). Refer to IPDM E/R Terminal Arrangement .
- IPDM E/R
Is the check result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Repair or replace malfunctioning parts.