Nissan Frontier. Manual — part 347
DLN-290
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
P1849 SOLENOID SHORT
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Check for a mechanical malfunction with the differential lock system. Replace differential sole-
noid.
4.
CHECK DIFFERENTIAL LOCK SOLENOID CIRCUIT
1. Disconnect differential lock control unit harness connector.
2. Check continuity between differential lock control unit harness
connector M70 (A) terminals 11, 12 and differential lock solenoid
harness connector C117 (B) terminals 4, 2.
3. Check continuity between differential lock control unit harness
connector M70 (A) terminals 11, 12 and ground.
Is the inspection result normal?
YES
>> Replace the differential lock control unit. Refer to
DLN-311, "Removal and Installation"
.
NG
>> Repair harness or connector.
Component
(+)
(-)
Solenoid operation
Terminal
Terminal
Differential lock
solenoid
4
2
Yes
A
B
Continuity
Connector
Terminal
Connector
Terminal
M70
11
C117
4
Yes
12
2
A
—
Continuity
Connector
Terminal
M70
11
Ground
No
12
AWDIA0311ZZ
P1850 SOLENOID CURRENT
DLN-291
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
P1850 SOLENOID CURRENT
Description
INFOID:0000000009479850
The differential lock control unit supplies power and ground to the differential lock solenoid via the differential
lock solenoid relay (integral to the differential lock control unit).
DTC Logic
INFOID:0000000009479851
Diagnosis Procedure
INFOID:0000000009479852
Regarding Wiring Diagram information, refer to
1.
CHECK DIFFERENTIAL SOLENOID CONTROL
1. Start engine.
2. Using CONSULT, select “RELAY ON”, “RELAY MTR”, “SOL MTR” of DIFF LOCK data monitor.
3. Observe the display values while operating the differential lock system.
Is the inspection result normal?
YES
>> Differential lock solenoid control system is operating normally.
NO
>> GO TO 2.
2.
CHECK DIFFERENTIAL LOCK SOLENOID RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect differential lock solenoid harness connector C117.
3. Check resistance between differential lock solenoid terminals 2 and 4.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace differential solenoid.
3.
CHECK DIFFERENTIAL LOCK SOLENOID OPERATION
Check operation by applying power and ground to the differential lock solenoid terminals.
Is the inspection result normal?
DTC
Display contents of CONSULT
DTC Detection Condition
Action to take
P1850
SOL CURRENT
[P1850]
The differential lock relay does not switch to OFF or there
is a short to power in the harness.
Inspect the differential lock
solenoid. Refer to
.
Monitor item
Condition
Differential lock mode switch
Display value
RELAY ON
• Vehicle stopped
• Engine running
• VDC OFF switch: ON
• 4WD shift switch: 4LO
ON
ON
OFF
OFF
RELAY MTR
ON
ON
OFF
OFF
SOL MTR
ON
ON
OFF
OFF
2 - 4
: Approx. 3.4
Ω
Component
(+)
(-)
Solenoid operation
Terminal
Terminal
Differential lock
solenoid
4
2
Yes
DLN-292
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
P1850 SOLENOID CURRENT
YES
>> GO TO 4.
NO
>> Check for a mechanical malfunction with the differential lock system. Replace differential sole-
noid.
4.
CHECK DIFFERENTIAL LOCK SOLENOID CIRCUIT
1. Disconnect differential lock control unit harness connector.
2. Check continuity between differential lock control unit harness
connector M70 (A) terminals 11, 12 and differential lock solenoid
harness connector C117 (B) terminals 4, 2.
3. Check continuity between differential lock control unit harness
connector M70 (A) terminals 11, 12 and ground.
Is the inspection result normal?
YES
>> Replace the differential lock control unit. Refer to
DLN-311, "Removal and Installation"
.
NG
>> Repair harness or connector.
A
B
Continuity
Connector
Terminal
Connector
Terminal
M70
11
C117
4
Yes
12
2
A
—
Continuity
Connector
Terminal
M70
11
Ground
No
12
AWDIA0311ZZ
C1203 ABS SYSTEM
DLN-293
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
C1203 ABS SYSTEM
Description
INFOID:0000000009479853
The differential lock control unit and the ABS actuator and electric unit (control unit) are in communication via
the CAN communication network. Vehicle speed and wheel slippage information is used by the differential lock
control unit to determine if conditions are met to actuate the differential lock solenoid.
DTC Logic
INFOID:0000000009479854
DTC
Display contents of CONSULT
DTC Detection Condition
Action to take
C1203
ABS SYSTEM
[C1203]
A malfunction related to wheel speed sensors has been
detected by the ABS actuator and electric unit (control
unit).
Check for proper ABS oper-
ation. Refer to
(Type
2).
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