Nissan Quest E52. Manual - part 1059

POWER RETURN MOTOR

SE-65

< DTC/CIRCUIT DIAGNOSIS >

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POWER RETURN MOTOR

LH

LH : Diagnosis Procedure

INFOID:0000000009652965

1.

CHECK POWER RETURN MOTOR (LH) INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Check voltage between power return motor assembly (LH) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK POWER RETURN MOTOR (LH) CIRCUIT

1.

Disconnect seatback power return control unit connector and power return motor assembly (LH) connec-
tor.

2.

Check continuity between seatback power return control unit harness connector and power return motor
assembly (LH) harness connector. 

3.

Check continuity between seatback power return control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace seatback power return control unit. Refer to 

SE-139, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace power return motor assembly (LH) [reclining device assembly (LH)]. Refer to 

SE-122,

"Exploded View"

.

NO

>> Repair or replace harness.

RH

RH : Diagnosis Procedure

INFOID:0000000009652966

1.

CHECK POWER RETURN MOTOR (RH) INPUT SIGNAL

1.

Turn ignition switch OFF.

(+)

(–)

Condition

Voltage (V)

Power return motor assembly (LH)

Connector

Terminal

B498

1

Ground

Power return motor assembly (LH)

Reverse operation

9 – 16

Other than the above

0 – 0.5

5

Return operation

9 – 16

Other than the above

0 – 0.5

Seatback power return control unit

Power return motor assembly (LH)

Continuity 

Connector

Terminal

Connector

Terminal

B487

5

B498

1

Existed

6

5

Seatback power return control unit 

Ground

Continuity

Connector

Terminal

B487

5

Not existed

6

SE-66

< DTC/CIRCUIT DIAGNOSIS >

POWER RETURN MOTOR

2.

Check voltage between power return motor assembly (RH) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK POWER RETURN MOTOR (RH) CIRCUIT

1.

Disconnect seatback power return control unit connector and power return motor assembly (RH) connec-
tor.

2.

Check continuity between seatback power return control unit harness connector and power return motor
assembly (RH) harness connector. 

3.

Check continuity between seatback power return control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace seatback power return control unit. Refer to 

SE-139, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace power return motor assembly (RH) [reclining device assembly (RH)]. Refer to 

SE-122,

"Exploded View"

.

NO

>> Repair or replace harness.

(+)

(–)

Condition

Voltage (V)

Power return motor assembly (RH)

Connector

Terminal

B494

1

Ground

Power return motor assembly (RH)

Reverse operation

9 – 16

Other than the above

0 – 0.5

5

Return operation

9 – 16

Other than the above

0 – 0.5

Seatback power return control unit

Power return motor assembly (RH)

Continuity 

Connector

Terminal

Connector

Terminal

B487

7

B494

1

Existed

8

5

Seatback power return control unit 

Ground

Continuity

Connector

Terminal

B487

7

Not existed

8

MOTOR SENSOR

SE-67

< DTC/CIRCUIT DIAGNOSIS >

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MOTOR SENSOR

LH

LH : Diagnosis Procedure

INFOID:0000000009652967

1.

CHECK MOTOR SENSOR (LH) POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect power return motor assembly (LH) connector.

3.

Check voltage between power return motor assembly (LH) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK MOTOR SENSOR (LH) POWER SUPPLY CIRCUIT

1.

Disconnect seatback power return control unit connector.

2.

Check continuity between seatback power return control unit harness connector and power return motor
assembly (LH) harness connector.

3.

Check continuity between seatback power return control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace seatback power return control unit. Refer to 

SE-139, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK MOTOR SENSOR (LH) GROUND CIRCUIT

1.

Check continuity between seatback power return control unit harness connector and power return motor
assembly (LH) harness connector.

2.

Check continuity between seatback power return control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK MOTOR SENSOR (LH) OUTPUT SIGNAL

(+)

(–)

Condition

Voltage (V)

Power return motor assembly (LH)

Connector

Terminal 

B498

6

Ground

When power return motor (LH) is operated

9 – 16

Seatback power return control unit

Power return motor assembly (LH)

Continuity

Connector

Terminal

Connector

Terminal

B487

11

B498

6

Existed

Seatback power return control unit

Ground

Continuity 

Connector

Terminal

B487

11

Not existed

Seatback power return control unit

Power return motor assembly (LH)

Continuity 

Connector

Terminal

Connector

Terminal

B487

9

B498

4

Existed

Seatback power return control unit

Ground

Continuity 

Connector

B487

9

Not existed

SE-68

< DTC/CIRCUIT DIAGNOSIS >

MOTOR SENSOR

1.

Connect seatback power return control unit connector.

2.

Check signal between seatback power return control unit harness connector and ground with an oscillo-
scope.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK MOTOR SENSOR (LH) SIGNAL CIRCUIT

1.

Disconnect power return motor assembly (LH) connector and seatback power return control unit connec-
tor.

2.

Check continuity between power return motor assembly (LH) harness connector and seatback power
return control unit harness connector.

3.

Check continuity between power return motor assembly (LH) harness connector and ground.

Is the inspection result normal?

YES

>> Replace power return motor assembly (LH) [reclining device assembly (LH)]. Refer to 

SE-122,

"Exploded View"

.

NO

>> Repair or replace harness.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

RH

RH : Diagnosis Procedure

INFOID:0000000009652968

1.

CHECK MOTOR SENSOR (RH) POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect power return motor assembly (RH) connector.

3.

Check voltage between power return motor assembly (RH) harness connector and ground.

(+)

(–)

Condition

Signal

(Reference value)

Seatback power return control unit

Connector

Terminal 

B487

10

Ground

During the power return motor 
(LH) operation

When pinching of seatback oc-
curs

The above pulse width should be 
expanded

JMKIA0070GB

Seatback power return control unit

Power return motor assembly (LH)

Continuity

Connector

Terminal

Connector

Terminal

B487

10

B498

3

Existed

Seatback power return control unit

Ground

Continuity

Connector

Terminal

B487

10

Not existed