Nissan Quest E52. Manual - part 1060

MOTOR SENSOR

SE-69

< DTC/CIRCUIT DIAGNOSIS >

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Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK MOTOR SENSOR (RH) 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 (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 MOTOR SENSOR (RH) GROUND CIRCUIT

1.

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

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.

(+)

(–)

Condition

Voltage (V)

Power return motor assembly (RH)

Connector

Terminal 

B494

6

Ground

When power return motor (RH) is operated

9 – 16

Seatback power return control unit

Power return motor assembly (RH)

Continuity

Connector

Terminal

Connector

Terminal

B487

3

B494

6

Existed

Seatback power return control unit

Ground

Continuity 

Connector

Terminal

B487

3

Not existed

Seatback power return control unit

Power return motor assembly (RH)

Continuity 

Connector

Terminal

Connector

Terminal

B487

1

B494

4

Existed

Seatback power return control unit

Ground

Continuity 

Connector

B487

1

Not existed

SE-70

< DTC/CIRCUIT DIAGNOSIS >

MOTOR SENSOR

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK MOTOR SENSOR (RH) SIGNAL CIRCUIT

1.

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

2.

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

3.

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

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.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

(+)

(–)

Condition

Signal

(Reference value)

Seatback power return control unit

Connector

Terminal 

B487

2

Ground

During the power return motor 
(RH) operation

When pinching seatback occurs

The above pulse width should be 
expanded

JMKIA0070GB

Seatback power return control unit

Power return motor assembly (RH)

Continuity

Connector

Terminal

Connector

Terminal

B487

2

B494

3

Existed

Seatback power return control unit

Ground

Continuity

Connector

Terminal

B487

2

Not existed

SEATBACK DOES NOT OPERATE POWER RETURN

SE-71

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

SEATBACK DOES NOT OPERATE POWER RETURN

BOTH SIDES

BOTH SIDES : Diagnosis Procedure

INFOID:0000000009652969

1.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check power supply and ground circuit.
Refer to 

SE-48, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CHECK VEHICLE SPEED SIGNAL CIRCUIT

Check vehicle speed signal circuit.
Refer to

SE-54, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning parts.

3.

CONFIRM THE OPERATION

Confirm the operation again.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> GO TO 1.

LH

LH : Diagnosis Procedure

INFOID:0000000009652970

1.

CHECK THIRD SEAT FOLD SWITCH (LH)

Check third seat fold switch (LH).
Refer to 

SE-49, "LH : Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CHECK POWER RETURN MOTOR (LH)

Check power return motor (LH).
Refer to 

SE-65, "LH : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning parts.

3.

CHECK SEATBACK ANGLE LIMIT SWITCH (LH)

Check seatback angle limit switch (LH).
Refer to 

SE-55, "LH : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the malfunctioning parts.

4.

CONFIRM THE OPERATION

Confirm the operation again.

Is the result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

SE-72

< SYMPTOM DIAGNOSIS >

SEATBACK DOES NOT OPERATE POWER RETURN

NO

>> GO TO 1.

RH

RH : Diagnosis Procedure

INFOID:0000000009652971

1.

CHECK THIRD SEAT FOLD SWITCH (RH)

Check third seat fold switch (RH).
Refer to 

SE-51, "RH : Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CHECK POWER RETURN MOTOR (RH)

Check power return motor (RH).
Refer to 

SE-65, "RH : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning parts.

3.

CHECK SEATBACK ANGLE LIMIT SWITCH (RH)

Check seatback angle limit switch (RH).
Refer to 

SE-56, "RH : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the malfunctioning parts.

4.

CONFIRM THE OPERATION

Confirm the operation again.

Is the result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> GO TO 1.