Nissan Armada 2025-2026 Service and Repair Manual: Diagnosis Procedure

PERFORM SELF-DIAGNOSIS

With CONSULT

1. Pull the parking brake switch.

   NOTE:

   Check to make sure that the parking brake switch indicator is turned ON.

2. Ignition switch OFF.

3. Get out of the vehicle and close all doors.

4. Wait 65 seconds.

   NOTE:

   • Check to make sure that the parking brake switch indicator is turned OFF.

   • If the rear brake calipers are hot, wait up to an hour until parking brake indicator light on the switch turns OFF. Once indicator light on the switch turns OFF, move to next step.

5. Ignition switch ON.

6. Perform self-diagnosis for “EPS/DIRECT ADAPTIVE STEERING 3”.

Is a malfunctioning system displayed?

YES>>

Check the DTC. Refer to DTC Index.

NO>>

GO TO 2.

CHECK THE ILLUMINATION OF THE POWER STEERING WARNING LAMP

Check that the power steering warning lamp turns ON when ignition switch ON. Then, power steering warning lamp turns OFF after the engine is started.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Perform trouble diagnosis of power steering warning lamp. Refer to Component Function Check.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (1)

With CONSULT

1. Start the engine.

   CAUTION:

   Never drive the vehicle.

2. Turn steering wheel from full left stop to full right stop.

3. Select “EPS/DIRECT ADAPTIVE STEERING 3”, “Data monitor” and “Assist level” in this order. Refer to Reference Value.

Dose the item in “Data monitor” indicate “99%”?

YES>>

GO TO 6.

NO>>

GO TO 4.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (2)

With CONSULT

Select “EPS/DIRECT ADAPTIVE STEERING 3”, “Data monitor” and “Battery voltage” in this order. Refer to Reference Value.

Is the display value “10.5 V” or more?

YES>>

GO TO 5.

NO>>

Perform trouble diagnosis of power steering control module power supply and ground. Refer to Diagnosis Procedure.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (3)

With CONSULT

1. Stop the EPS system until the item becomes “99%”.

   NOTE:

   While stopping the EPS system, do not turn steering wheel.

2. Check that the symptom continues.

Dose the symptom continue?

YES>>

GO TO 6.

NO>>

The assist torque decreases because of protection function. This is not malfunction. INSPECTION END

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (4)

With CONSULT

1. Start the engine.

   CAUTION:

   Never drive the vehicle.

2. Turn steering wheel from full left stop to full right stop.

3. Select “EPS/DIRECT ADAPTIVE STEERING 3”, “Data monitor” and “Steering torque” in this order. Refer to Reference Value.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Replace the power steering control module (steering gear assembly). Refer to Removal and Installation.

CHECK THE STEERING FORCE

Check the steering wheel turning force. Refer to Inspection.

Is the check result normal?

YES>>

INSPECTION END

NO>>

It is possible that there is a mechanical malfunction. Check the steering system. Refer to Inspection.