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 INPUT SPEED SENSOR POWER CIRCUIT

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

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

+		-	Voltage
Input speed sensor
Connector	Terminal
F37	3	Ground	10 - 16 V

Is the inspection result normal?

YES

GO TO 2.

GO TO 6.

CHECK INPUT SPEED SENSOR GROUND CIRCUIT

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

Input speed sensor		--	Continuity
Connector	Terminal
F37	1	Ground	Existed

Is the inspection result normal?

YES

GO TO 3.

Repair or replace malfunctioning parts.

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

Turn ignition switch OFF.
Disconnect TCM connector.

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

Input speed sensor		TCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F37	2	F25	24	Existed

Is the inspection result normal?

YES

GO TO 4.

Repair or replace malfunctioning parts.

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

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

Input speed sensor		--	Continuity
Connector	Terminal
F37	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 input speed sensor.

+		-	Condition	Frequency (Approx.)
TCM
Connector	Terminal
F25	24	Ground	Selector lever: "M1" position Vehicle speed: 20 km/h (12 MPH)	880 Hz Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

Replace input 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 input 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.