Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONTROL MODULE GROUND CIRCUIT

Turn the ignition switch OFF.
Disconnect steering force control module harness connector.

Check the continuity between control module harness connector and ground.

Steering force control module		-	Continuity
Connector	Terminal	-	Continuity
M72	33	Ground	Existed

Is the inspection result normal?

YES

GO TO STEP 2 .

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

CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (1)

Turn the ignition switch ON.

Check the voltage between control module harness connector and ground.

Steering force control module		-	Voltage (Approx.)
Connector	Terminal	-	Voltage (Approx.)
M72	34	Ground	10.5 - 16.0 V

Is the inspection result normal?

YES

GO TO STEP 4 .

GO TO STEP 3 .

CHECK CONTROL MODULE POWER SUPPLY CIRCUIT (2)
1. Turn the ignition switch OFF.
2. Check the 60A fusible link (#G).
3. Check the harness for open or short between steering force control module harness connector No. 34 terminal and the 60A fusible link (#G).
Is the inspection result normal?

YES

Perform the trouble diagnosis for battery power supply circuit. Refer to WIRING DIAGRAM - BATTERY POWER SUPPLY - .

NO

Repair or replace error - detected parts.

CHECK INTERMITTENT INCIDENT
1. Turn the ignition switch OFF.
2. Check enlarged contact spring of terminal. Refer to HOW TO CHECK TERMINAL .
3. Perform intermittent incident while turning steering wheel. Refer to INTERMITTENT INCIDENT .
Is the inspection result normal?

YES

Replace steering force control module. Refer to REMOVAL AND INSTALLATION .

NO

Repair or replace error - detected part.