Infiniti QX56 (JA60). Manual - part 285

 

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Infiniti QX56 (JA60). Manual - part 285

 

 

P1824 TRANSFER MOTOR

DLN-63

< COMPONENT DIAGNOSIS >

[ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

Without CONSULT-III

1. Start engine.

2. Check voltage between transfer control unit harness connector

terminal and ground.

MOTOR 
RELAY 
MON

• Accelerator ped-

al depressed

• Vehicle stopped
• Engine running
• Brake pedal de-

pressed

4WD shift switch: 2WD

OFF

4WD shift switch: AUTO or 
4LO (A/T selector lever P or N 
position)

OFF
(ON for approx. 
2 sec. after 
shifting to P and 
N.)

4WD shift switch: AUTO or 
4LO (Except for A/T selector 
lever P or N position)

ON

4WD shift switch: 4H (A/T se-
lector lever P position)

OFF
(ON for approx. 
2 sec. after 
shifting to P.)

4WD shift switch: 4H (Except 
for A/T selector lever P posi-
tion)

ON

Monitored 

item

Condition

Display value

(Approx.)

Connector

Terminal

Condition

Voltage (Approx.)

E142

 14 - 

Ground

• Accelera-

tor pedal 
depressed

• Vehicle 

stopped

• Engine 

running

• Brake 

pedal de-
pressed

4WD shift switch: 
2WD

Battery voltage

4WD shift switch: 
AUTO or 4LO (A/T 
selector lever P or N 
position)

Battery voltage
(0V for approx. 2 
sec. after shifting 
to P and N.)

4WD shift switch: 
AUTO or 4LO (Ex-
cept for A/T selector 
lever P or N position)

0V

4WD shift switch: 4H 
(A/T selector lever P 
position)

Battery voltage
(0V for approx. 2 
sec. after shifting 
to P.)

4WD shift switch: 4H 
(Except for A/T se-
lector lever P posi-
tion)

0V

SDIA2735E

DLN-64

< COMPONENT DIAGNOSIS >

[ATX14B]

P1824 TRANSFER MOTOR

Are the inspection results normal?

YES 

>> GO TO 7.

NO

>> GO TO 2.

2.

CHECK TRANSFER MOTOR RELAY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)

2. Connect transfer control unit harness connector.

3. Disconnect transfer motor relay.

4. Check voltage between transfer motor relay harness connector

terminals and ground.

5. Turn ignition switch ON. (Do not start engine.)

6. Check voltage between transfer motor relay harness connector

terminals and ground.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Check the following. If any items are damaged, repair

or replace damaged parts.

• 20A fuse (No. 58 located in the fuse and relay box).

• 10A fuse (No. 26 located in the fuse and fusible link box).

• Harness for short or open between battery and transfer motor relay harness connector E154 ter-

minal 5.

• Harness for short or open between transfer shut off relay harness connector E69 terminal 3  and

transfer motor relay harness connector E153 terminal 2.

E143

 41 - 

Ground

• Accelera-

tor pedal 
depressed

• Vehicle 

stopped

• Engine 

running

• Brake 

pedal de-
pressed

4WD shift switch: 
2WD

0V

4WD shift switch: 
AUTO or 4LO (A/T 
selector lever P or N 
position)

0V
(Battery voltage 
for approx. 2 sec. 
after shifting to P 
and N.)

4WD shift switch: 
AUTO or 4LO (Ex-
cept for A/T selector 
lever P or N position)

Battery voltage

4WD shift switch: 4H 
(A/T selector lever P 
position)

0V
(Battery voltage 
for approx. 2 sec. 
after shifting to P.)

4WD shift switch: 4H 
(Except for A/T se-
lector lever P posi-
tion)

Battery voltage

Connector

Terminal

Condition

Voltage (Approx.)

Connector

Terminal

Voltage (Approx.)

E153

2 - Ground

0V

E154

5 - Ground 

Battery voltage

WDIA0169E

Connector

Terminal

Voltage (Approx.)

E153

2 - Ground

Battery voltage

E154

5 - Ground 

WDIA0170E

P1824 TRANSFER MOTOR

DLN-65

< COMPONENT DIAGNOSIS >

[ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

• Battery and ignition switch.

3.

CHECK TRANSFER MOTOR RELAY

1. Turn ignition switch OFF.

2. Remove transfer motor relay. Refer to 

DLN-16, "Component Parts Location"

.

3. Apply 12V direct current between transfer motor relay terminals

1 and 2.

4. Check continuity between relay terminals 3 and 5.

Are the inspection results normal?

YES

>> GO TO 4.

NO

>> Replace the transfer motor relay.

4.

CHECK TRANSFER MOTOR CONTROL CIRCUIT

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)

2. Remove transfer motor relay.

3. Disconnect transfer control unit harness connector and transfer motor.

4. Check continuity between the following terminals.

-

Transfer control unit harness connector E142 terminal 14 and

transfer motor relay harness connector E153 terminal 1.

-

Transfer control unit harness connector E143 terminal 41 and

transfer motor relay harness connector E154 terminal 3.

-

Transfer control unit harness connector E143 terminal 41 and

transfer motor harness connector F57 terminal 14.

Also check harness for short to ground and short to power.

Are the inspection results normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK TRANSFER MOTOR GROUND CIRCUIT

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)

2. Disconnect transfer motor harness connector.

Condition

Continuity

12V direct current supply between terminals 1 and 2

Yes

OFF

No

LDIA0098E

SDIA2738E

Continuity should exist.

WDIA0143E

DLN-66

< COMPONENT DIAGNOSIS >

[ATX14B]

P1824 TRANSFER MOTOR

3. Check continuity between transfer motor harness connector F57

terminal 15 and ground.

Also check harness for short to ground and short to power.

Are the inspection results normal?

YES 

>> GO TO 6.

NO

>> Repair open circuit or short to ground or short to power

in harness or connectors.

6.

CHECK TRANSFER MOTOR

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)

2. Disconnect transfer motor harness connector.

3. Apply 12V direct current between transfer motor terminals 14

and 15.

Does transfer motor operate?

YES

>> GO TO 7.

NO

>> Replace transfer motor. Refer to 

DLN-140, "Removal

and Installation"

.

7.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-81, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 8.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

8.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> Replace transfer control unit. Refer to 

DLN-130, "Removal and Installation"

.

Component Inspection

INFOID:0000000005148828

TRANSFER MOTOR RELAY

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer motor relay. Refer to 

DLN-16, "Component Parts Location"

.

3. Apply 12V direct current between transfer motor relay terminals

1 and 2.

4. Check continuity between relay terminals 3 and 5.

5. If inspection results are abnormal replace transfer motor relay.

TRANSFER MOTOR

Continuity should exist.

SDIA2740E

LDIA0097E

Condition

Continuity

12V direct current supply between terminals 1 and 2

Yes

OFF

No

LDIA0098E

 

 

 

 

 

 

 

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