Infiniti QX56 (JA60). Manual - part 283

P1822 CLUTCH PRESSURE SOLENOID

DLN-55

< COMPONENT DIAGNOSIS >

[ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

Are the inspection results normal?

YES 

>> GO TO 7.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND CLUTCH PRESSURE SOLENOID

VALVE

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

2. Disconnect transfer control unit harness connector, transfer terminal cord assembly harness connector

and transfer dropping resistor.

3. Check continuity between transfer control unit harness connec-

tor E142 terminal 19 and transfer terminal cord assembly har-

ness connector F56 terminal 6.

4. Check continuity between transfer dropping resistor harness

connector E135 terminal 2 and transfer terminal cord assembly

harness connector F56 terminal 6.

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

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER DROPPING RESISTOR

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

2. Disconnect transfer control unit harness connector and transfer dropping resistor harness connector.

Connector

Terminal

Condition

Voltage 

(Approx.)

E142

 10 - 

Ground

• Vehicle stopped
• Engine running
• A/T selector lever 

N position

• Brake pedal de-

pressed

4WD shift switch: 
AUTO

4 - 14V

4WD shift switch: 
2WD, 4H or 4LO

Less than 
1V

 19 - 

Ground

• Vehicle stopped
• Engine running
• A/T selector lever 

N position

• Brake pedal de-

pressed

4WD shift switch: 
AUTO

1.5 - 3V

4WD shift switch: 
2WD, 4H or 4LO

Less than 
1V

Continuity should exist.

SDIA2720E

Continuity should exist.

SDIA2721E

DLN-56

< COMPONENT DIAGNOSIS >

[ATX14B]

P1822 CLUTCH PRESSURE SOLENOID

3. Check continuity between transfer control unit harness connec-

tor E142 terminal 10 and transfer dropping resistor harness con-

nector E135 terminal 1.

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

Are the inspection results normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK GROUND CIRCUIT

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

2. Disconnect transfer terminal cord assembly harness connector.

3. Check continuity between transfer terminal cord assembly har-

ness connector F56 terminal 19 and ground.

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

Are the inspection results normal?

YES 

>> GO TO 5.

NO

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

in harness or connectors.

5.

CHECK CLUTCH PRESSURE SOLENOID

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

2. Disconnect transfer terminal cord assembly harness connector.

3. Check resistance between transfer terminal cord assembly har-

ness connector F56 terminals 6 and 19.

Are the inspection results normal?

YES

>> GO TO 6.

NO

>> Replace clutch pressure solenoid.  Refer to 

DLN-16,

"Component Parts Location"

.

6.

CHECK TRANSFER DROPPING RESISTOR

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

2. Disconnect transfer dropping resistor harness connector.

3. Check resistance between transfer dropping resistor terminals 1

and 2.

Are the inspection results normal?

YES

>> GO TO 7.

NO

>> Replace transfer dropping resistor.

7.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-81, "Reference Value"

.

Continuity should exist.

SDIA2722E

Continuity should exist.

SDIA2723E

6 - 19

: Approx. 3.0 - 3.4 

Ω

SDIA2724E

1 - 2

: Approx. 11.2 - 12.8 

Ω

SDIA2725E

P1822 CLUTCH PRESSURE SOLENOID

DLN-57

< COMPONENT DIAGNOSIS >

[ATX14B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

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

Drive the vehicle and then perform self-diagnosis.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> Replace transfer control unit. Refer to 

DLN-130, "Removal and Installation"

.

Component Inspection

INFOID:0000000005148820

CLUTCH PRESSURE SOLENOID

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer terminal cord assembly harness connector.
3. Check resistance between transfer terminal cord assembly ter-

minals 6 and 19.

4. If the inspection results are abnormal replace clutch pressure

solenoid. Refer to 

DLN-16, "Component Parts Location"

.

TRANSFER DROPPING RESISTOR

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer dropping resistor harness connector.
3. Check resistance between transfer dropping resistor terminals 1

and 2.

4. If the inspection results are abnormal replace transfer dropping

resistor. Refer to 

DLN-16, "Component Parts Location"

.

6 - 19

: Approx. 3.0 - 3.4 

Ω

WDIA0225E

1 - 2

: Approx. 11.2 - 12.8 

Ω

SDIA2725E

DLN-58

< COMPONENT DIAGNOSIS >

[ATX14B]

P1823 2-4 SOLENOID

P1823 2-4 SOLENOID

Description

INFOID:0000000005148821

Proper voltage is not applied to the 2-4WD solenoid valve due to an open or short circuit.

DTC Logic

INFOID:0000000005148822

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1823 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-58, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005148823

Regarding Wiring Diagram information, refer to 

DLN-89, "Wiring Diagram - ALL-MODE 4WD SYSTEM -"

.

1.

CHECK 4WD SHIFT SWITCH SYSTEM

Perform self-diagnosis. Refer to 

DLN-18, "CONSULT-III Function (ALL MODE AWD/4WD)"

.

Is the 4WD MOD SW [P1814] (with CONSULT-III) or Flickering pattern: 16 (without CONSULT-III) detected?

YES

>> Perform trouble diagnosis for 4WD shift switch. Refer to 

DLN-32, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

CHECK 2-4WD SHIFT SOLENOID SIGNAL

With CONSULT-III

1. Start engine.

2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.

3. Read out the value of 2-4WD SOL and 2-4WD SOL MON.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1823]

2-4WD SOLENOID

Proper voltage is not applied to 2-4WD 
solenoid valve due to open or short cir-
cuit.

Refer to 

DLN-58

.

Monitored 

item

Condition

Display 

value

2-4WD SOL

• Vehicle stopped
• Engine running
• A/T selector lever N 

position

• Brake pedal de-

pressed

4WD shift switch: 2WD

OFF

4WD shift switch: AUTO

ON

4WD shift switch: 4H

4WD shift switch: 4LO

4WD shift switch: AUTO 
(Wait function is operating.)

OFF

4WD shift switch: 4H (Wait 
function is operating.)

OFF