Nissan Altima HL32 Hybrid. Manual - part 1060

C1606 EPS MOTOR

STC-19

< COMPONENT DIAGNOSIS >

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C1606 EPS MOTOR

Description

INFOID:0000000004212836

EPS motor provides the assist torque by control signal from EPS control unit.

DTC Logic

INFOID:0000000004212837

DTC DETECTION LOGIC

NOTE:
C1606 may be detected also for malfunctions other than EPS system components.

DTC CONFIRMATION PROCEDURE

1.

ERASE DTC MEMORY

 With CONSULT-III

1. Record DTC.

2. Erase DTC once.

NOTE:

After erasing DTC record, currently occurred DTC can be detected by reading out DTC again.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION

 With CONSULT-III

1. Turn the ignition switch ON (READY).

2. Steer 360

° leftward and rightward slowly.

3. Return the steering wheel to the straight-ahead position.

4. Perform the self-diagnosis.
Is DTC “C1606” detected?

YES

>> Proceed to 

STC-19, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004212838

1.

CHECK EPS MOTOR GROUND

1. Turn the ignition switch OFF.

2. Check the installation condition of the EPS motor ground wire connected to the steering gear assembly.

CAUTION:

EPS motor ground wire is securely installed to the steering gear assembly and body ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the EPS motor ground wire installation condition.

2.

CHECK EPS MOTOR ANGLE SENSOR CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect EPS control unit harness connector and EPS motor angle sensor harness connector.

DTC

Item

(CONSULT-III screen term)

DTC detecting condition

Possible cause

C1606

EPS MOTOR

When the motor driver malfunction in EPS control 
unit or EPS motor malfunction is detected.

• EPS motor angle sensor ini-

tialization incomplete

• EPS motor angle sensor
• Harness or connector
• EPS motor
• EPS control unit

STC-20

< COMPONENT DIAGNOSIS >

C1606 EPS MOTOR

3. Check the continuity between EPS control unit harness connec-

tor and EPS motor angle sensor harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the harnesses or connectors.

3.

CHECK EPS MOTOR CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect EPS control unit harness connector and EPS motor harness connector.

3. Check the continuity between EPS control unit harness connec-

tor and EPS motor harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the harnesses or connectors.

4.

CHECK EPS MOTOR

Check the resistance between EPS motor harness connector terminals. Refer to 

STC-21, "Component

Inspection (EPS Motor)"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> EPS motor is malfunctioning. Replace steering gear assembly. Refer to 

ST-12, "Removal and

Installation"

.

5.

CHECK EPS MOTOR ANGLE SENSOR

Check the resistance between EPS motor angle sensor harness connector terminals. Refer to 

STC-22, "Com-

ponent Inspection (EPS Motor Angle Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> EPS motor angle sensor is malfunctioning. Replace steering gear assembly. Refer to 

ST-12,

"Removal and Installation"

.

6.

CHECK EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION PER-

FORMED
Check if EPS motor angle sensor initialization and torque sensor calibration are performed before the self-

diagnosis.
Were the above items performed before the self-diagnosis?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT-III

EPS control unit

EPS motor angle sensor

Continuity

Connector

Terminal

Connector

Terminal

E326

14

E329

4

Existed

15

5

16

6

17

7

PGIA0089E

EPS control unit

EPS motor

Continuity

Connector

Terminal

Connector

Terminal

E325

11

E328

1

Existed

12

3

13

2

PGIA0090E

C1606 EPS MOTOR

STC-21

< COMPONENT DIAGNOSIS >

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Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

STC-19, "DTC Logic"

.

Which DTC is detected?

C1606 >> Replace EPS control unit. Refer to 

STC-58, "Removal and Installation"

.

Except C1606>>Check the malfunctioning system.

No DTC>>INSPECTION END

8.

INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN

 With CONSULT-III

Perform EPS motor angle sensor initialization and torque sensor calibration again. Refer to 

STC-5, "EPS

MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION : Special Repair

Requirement"

.

Were they performed correctly?

YES

>> GO TO 9.

NO

>> Check the malfunctioning cause.

9.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT-III

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

STC-19, "DTC Logic"

.

Is DTC “C1606” detected?

YES

>> GO TO 10.

NO

>> INSPECTION END

10.

CHECK THE NUMBER OF WORK SUPPORT IMPLEMENTATIOS

Check the numbers of EPS motor angle sensor initialization and torque sensor calibration.
How many times were they implemented?

Once/twice>>GO TO 8.

More than twice>>Replace EPS control unit, refer to 

STC-58, "Removal and Installation"

. Then GO TO 11.

11.

INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN

 With CONSULT-III

Perform EPS motor angle sensor initialization and torque sensor calibration again. Refer to 

STC-5, "EPS

MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION : Special Repair

Requirement"

.

Were they performed correctly?

YES

>> GO TO 12.

NO

>> Check the malfunctioning cause.

12.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT-III

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

STC-19, "DTC Logic"

.

Is DTC “C1606” detected?

YES

>> GO TO 13.

NO

>> INSPECTION END

13.

CHECK THE NUMBER OF WORK SUPPORT IMPLEMENTATIOS

Check the numbers of EPS motor angle sensor initialization and torque sensor calibration after replacement of

EPS control unit.
How many times were they implemented?

Once/twice>>GO TO 11.

More than twice>>EPS motor or EPS motor angle sensor is malfunctioning. Replace steering gear assembly.

Refer to 

ST-12, "Removal and Installation"

.

Component Inspection (EPS Motor)

INFOID:0000000004212839

1.

CHECK EPS MOTOR

1. Turn the ignition switch OFF.

2. Disconnect EPS motor harness connector.

STC-22

< COMPONENT DIAGNOSIS >

C1606 EPS MOTOR

3. Check the resistance between EPS motor harness connector

terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> EPS motor is malfunctioning. Replace steering gear assembly. Refer to 

ST-12, "Removal and

Installation"

.

Component Inspection (EPS Motor Angle Sensor)

INFOID:0000000004212840

1.

CHECK EPS MOTOR ANGLE SENSOR

1. Turn the ignition switch OFF.

2. Disconnect EPS motor angle sensor harness connector.

3. Check the resistance between EPS motor angle sensor harness

connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> EPS motor angle sensor is malfunctioning. Replace steering gear assembly. Refer to 

ST-12,

"Removal and Installation"

.

Special Repair Requirement

INFOID:0000000004212841

1.

INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN

Always perform EPS motor angle sensor initialization and torque sensor calibration after replacing EPS con-

trol unit or steering gear assembly. Refer to 

STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND

TORQUE SENSOR CALIBRATION : Special Repair Requirement"

.

>> END

EPS motor

 Resistance (Approx.)

Connector

Terminal

E328

1 – 2

Less than 10 

Ω

2 – 3

3 – 1

PGIA0091E

EPS motor angle sensor

 Resistance (Approx.)

Connector

Terminal

E329

4 – 6

50 – 140 

Ω

7 – 6

5 – 6

15 – 45 

Ω

PGIA0092E