Nissan Ariya: Steering Control System

• Diagnosis and Repair Work Flow
• Additional Service When Replacing Power Steering Control Module
• Configuration (power Steering Control Module)
• Res Reset

Diagnosis and Repair Work Flow

Work Flow

DETAILED FLOW

INTERVIEW FROM THE CUSTOMER

Clarify customer complaints before inspection. First of all, perform an interview utilizing Diagnostic Work Sheet. and reproduce symptoms as well as fully understand it. Ask customer about his/her complaints carefully. Check symptoms by driving Nissan Ariya vehicle with customer, if necessary.

CAUTION:

Customers are not professional. Never guess easily like “maybe the customer means that...,” or “maybe the customer mentions this symptom”.

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GO TO 2.

CHECK SYMPTOM

Reproduce the symptom that is indicated by the customer, based on the information from the customer obtained by interview. Also check that the symptom is not caused by protection function. Refer to Protection Function .

CAUTION:

When the symptom is caused by normal operation, fully inspect each portion and obtain the.understanding of customer that the symptom is not caused by a malfunction.

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GO TO 3.

PERFORM SELF DIAGNOSTIC RESULT

CONSULT

Select “Self Diagnostic Result” mode of “EPS/DAST 3”.

Is any DTC detected?

YES>>

Record or print DTC and freeze frame data (FFD). GO TO 4.

NO>>

GO TO 6.

RECHECK SYMPTOM

CONSULT

1. Erase “Self Diagnostic Result” mode of “EPS/DAST 3”.

2. Perform DTC confirmation procedures for the malfunctioning system.

NOTE:

If some DTCs are detected at the same time, determine the order for performing the diagnosis based on DTC Inspection Priority Chart.

Is any DTC detected?

YES>>

GO TO 5.

NO >>

Check harness and connectors based on the information obtained by interview. Refer to Diagnostic Work Sheet.

REPAIR OR REPLACE MALFUNCTIONING PARTS

CONSULT

• Repair or replace malfunctioning parts.

• Reconnect part or connector after repairing or replacing.

• When DTC is detected, erase “Self Diagnostic Result” mode of “EPS/DAST 3”.

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GO TO 7.

IDENTIFY MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS

Estimate malfunctioning system based on symptom diagnosis and perform inspection.

Can the malfunctioning system be identified?

YES>>

GO TO 7.

NO >>

Check harness and connectors based on the information obtained by interview. Refer to Diagnostic Work Sheet.

FINAL CHECK

CONSULT

1. Check the reference value for EPS control unit.

2. Recheck the symptom and check that symptom is not reproduced on the same conditions.

Is the symptom reproduced?

YES>>

GO TO 3.

NO>>

Inspection End.

Diagnostic Work Sheet

Description

• In general, customers have their own criteria for a problem. Therefore, it is important to understand the symptom and status well enough by asking the customer about his/her concerns carefully. To systemize all the information for the diagnosis, prepare the interview sheet referring to the interview points.

• In some cases, multiple conditions that appear simultaneously may cause a DTC to be detected.

Interview sheet sample

Interview sheet
Customer name	MR/MS	Registration number		Initial year registration
		Nissan Ariya Vehicle type		VIN
Storage date		Mileage	km (Mile)
Symptom		□The steering wheel position (center) is in the wrong position.
		□EPS warning lamp turns on.
		□Noise  □Vibration
		□Others (                                     )
First occurrence		□Recently  □Others (                          )
Frequency of occurrence		□Always  □Under a certain conditions of  □Sometimes (time(s)/day)
Climate conditions		□Irrelevant
	Weather	□Fine  □Cloud  □Rain  □Snow  □Others (           )
	Temperature	□Hot  □Warm  □Cool  □Cold  □Temperature [Approx.     °C °F)]
	Relative humidity	□High  □Moderate  □Low
Road conditions		□Urban area  □Suburb area  □High way □Mountain road (uphill or down hill)  □Rough road
Operation conditions, etc.		□Irrelevant □During driving  □During acceleration  □At constant speed driving □During deceleration  □During cornering (right curve or left curve) □During steering
Other conditions
Memo

Additional Service When Replacing Power Steering Control Module

Work Procedure

Vehicle specification needs to be written with CONSULT because it is not written after replacing the power steering control module.

For details the operation, refer to “CONSULT Operation Manual”.

WRITING VEHICLE SPECIFICATION

With CONSULT

Perform writing Nissan Ariya vehicle specification to power steering control module according to "Replace ECU" in CONSULT Operation Manual.

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GO TO 2.

PERFORM NECESSARY WORK

With CONSULT

1. Perform configuration. Work Procedure .

2. Perform adjustment of steering angle sensor neutral position. Work Procedure.

3. Perform steering torque calibration. Wrok procedure .

4. Perform rack reset. Work Procedure .

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

6. Erase the memory of self-diagnosis results.

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WORK END

Configuration (power Steering Control Module)

Work Procedure

Vehicle specification needs to be written with CONSULT because it is not written after replacing the power steering control module.

For details the operation, refer to “CONSULT Operation Manual”.

WRITING VEHICLE SPECIFICATION

With CONSULT

Perform writing Nissan Ariya vehicle specification to power steering control module according to "Replace ECU" in CONSULT Operation Manual.

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WORK END

Res Reset

Work Procedure

NOTE:

• When steering column assembly and steering gear assembly are replaced, RES reset (steering angle learning value reset) is performed.

• When the toe-in is adjusted, RES reset (steering wheel turning angle learning value reset) is performed.

RES RESET

With CONSULT

1. Set the Nissan Ariya vehicle to READY.

2. Select "EPS/DIRECT ADAPTIVE STEERING 3", "Work support", and "Rack end value reset" in the order.

3. Touch "Start".

4. Touch "End".

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GO TO 2.

RES LEARNING

With CONSULT

1. The steering wheel from full left stop to full right stop.

2. Select "EPS/DIRECT ADAPTIVE STEERING 3" and "Data monitor" in the order.

3. Select "Rack end learning status (Left)" and "Rack end learning status (Right)", and check that the display is "Completed".

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

There is a possibility that resetting and learning have not been performed correctly, so start over from Step 1. GO TO 1.

ERASE SELF DIAGNOSTIC RESULT

With CONSULT

1. Record or print self-diagnosis results and freeze frame data (FFD).

2. Erase self-diagnostic results for “EPS/DIRECT ADAPTIVE STEERING 3”.

Is the memory erase completed?

YES>>

INSPECTION END

NO>>

Check the items displayed in the self-diagnosis.