Nissan Frontier D40. Manual — part 315
P1838 ON SWITCH
DLN-281
< COMPONENT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
1.
Turn ignition switch OFF.
2.
Connect differential lock mode switch harness connector.
3.
Check voltage between differential lock control unit harness
connector M70 terminals 9, 22 and ground.
Is the inspection result normal?
YES
>> Replace the differential lock control unit. Refer to
DLN-310, "Removal and Installation"
.
NO
>> GO TO 4.
4.
CHECK DIFFERENTIAL LOCK MODE SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect differential lock mode switch harness connector.
3.
Operate differential lock mode switch and check continuity
between differential lock mode switch terminals.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace differential lock mode switch.
5.
CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND DIFFERENTIAL LOCK
MODE SWITCH
1.
Check continuity between differential lock control unit harness
connector M70 (A) terminals 9, 22 and differential lock mode
switch harness connector M149 (B) terminals 2, 1.
2.
Check continuity between differential lock control unit harness
connector M70 (A) terminals 9, 22 and ground.
Is the inspection result normal?
YES >> Replace the differential lock control unit. Refer to
DLN-310, "Removal and Installation"
.
NO
>> Repair harness or connector.
(+)
(-)
Differential lock mode
switch
Voltage (Approx.)
Connector
Terminal
M70
9
Ground
ON
Battery voltage
OFF
0V
22
ON
0V
OFF
Battery voltage
SDIA2568E
Terminals
Differential lock mode switch
Continuity
1 - 3
ON
No
OFF
Yes
2 - 3
ON
Yes
OFF
No
SDIA2535E
Connector
Terminal
Connector
Terminal
Continuity
M70 (A)
9
M149 (B)
2
Yes
22
1
Connector
Terminal
Ground
Continuity
M70 (A)
9
No
22
ALDIA0165ZZ
DLN-282
< COMPONENT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
P1839 POSITION SWITCH ON
P1839 POSITION SWITCH ON
Description
INFOID:0000000005275604
The differential lock position switch sends a signal to the differential lock control unit when the differential lock
is engaged. The differential lock control unit monitors the left and right rear wheel speed sensor signals to
determine wheel slippage. When the differential lock is engaged the left and right rear wheel speed sensor sig-
nals should match.
DTC Logic
INFOID:0000000005275605
Diagnosis Procedure
INFOID:0000000005275606
Regarding Wiring Diagram information, refer to
1.
CHECK DIFFERENTIAL LOCK POSITION SWITCH SIGNAL
1.
Start engine.
2.
Using CONSULT-III, select “D-LOCK POS SW SIG” of DIFF LOCK data monitor.
3.
Activate the differential lock according to the directions listed in the table and monitor the display value.
Is the inspection result normal?
YES
>> Differential lock position switch is operating normally.
NO
>> GO TO 2.
2.
CHECK DIFFERENTIAL LOCK POSITION SWITCH
1.
Disconnect differential lock position switch harness connector.
2.
Turn ignition switch ON.
3.
Select “D-LOCK POS SW SIG” of DIFF LOCK data monitor.
4.
Monitor the display value while connecting and disconnecting a
jumper wire between differential lock position switch harness
connector C116 terminals 1 and 3.
Is the inspection result normal?
YES
>> Check the mechanical operation of the differential lock. Replace the differential lock position
switch. Refer to
DLN-311, "Removal and Installation"
.
NO
>> GO TO 3.
3.
CHECK DIFFERENTIAL LOCK POSITION SWITCH VOLTAGE
DTC
Display contents of CONSULT-III
DTC Detection Condition
Action to take
P1839
POSI SW ON
[P1839]
The differential lock position switch is ON indicating the
differential is locked, but the differential lock control unit
detects a difference between left and right rear wheel
speeds.
Inspect the differential lock
position switch. Refer to
DLN-282, "Diagnosis Proce-
dure"
.
Monitor item
Condition
Display value
D-LOCK POS SW SIG
• Vehicle stopped
• Engine running
• VDC OFF switch (A/T mod-
els): ON
• 4WD shift switch: 4LO
Differential lock mode switch: ON
(DIFF LOCK indicator lamp: ON)
ON
Differential lock mode switch: OFF
(DIFF LOCK indicator lamp: OFF)
OFF
Monitor item
Condition
Display value
D-LOCK POS SW SIG
Jumper wire connected
ON
Jumper wire disconnected
OFF
AWDIA0305ZZ
P1839 POSITION SWITCH ON
DLN-283
< COMPONENT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
Check voltage between differential lock position switch harness con-
nector C116 terminal 3 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between differential lock position switch har-
ness connector C116 terminal 1 and ground.
Is the inspection result normal?
YES
>> Replace the differential lock control unit. Refer to
310, "Removal and Installation"
NO
>> Repair harness or connector.
5.
CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND DIFFERENTIAL LOCK PO-
SITION SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect differential lock control unit harness connector.
3.
Check continuity between differential lock control unit harness
connector M70 (A) terminal 20 and differential lock position
switch harness connector C116 (B) terminal 3.
4.
Check continuity between differential lock control unit harness
connector M70 (A) terminal 20 and ground.
Is the inspection result normal?
YES >> Replace differential lock control unit. Refer to
DLN-310, "Removal and Installation"
.
NO
>> Repair harness or connector.
(+)
(-)
Voltage (Approx.)
Connector
Terminal
C116
3
Ground
Battery voltage
AWDIA0306ZZ
Connector
Terminal
—
Continuity
C116
1
Ground
Yes
AWDIA0307ZZ
Connector
Terminal
Connector
Terminal
Continuity
M70 (A)
20
C116 (B)
3
Yes
Connector
Terminal
Ground
Continuity
M70 (A)
20
No
AWDIA0308ZZ
DLN-284
< COMPONENT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
P1844 RELAY
P1844 RELAY
Description
INFOID:0000000005275607
The differential lock solenoid relay is an integral part of the differential lock control unit.
DTC Logic
INFOID:0000000005275608
Diagnosis Procedure
INFOID:0000000005275609
Regarding Wiring Diagram information, refer to
1.
CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect differential lock control unit harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between differential lock control unit harness
connector M70 terminals 1, 2, 15 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Check fuse. Repair harness or connectors.
2.
CHECK DIFFERENTIAL LOCK CONTROL UNIT GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between differential lock control unit harness
connector M70 terminals 3, 10 and ground.
Is the inspection result normal?
YES
>> Power and ground supply is normal.
NO
>> Repair harness or connectors.
DTC
Display contents of CONSULT-III
DTC Detection Condition
Action to take
P1844
RELAY
[P1844]
The differential lock control unit relay monitor did not de-
tect expected voltage at the relay.
Inspect differential lock con-
trol unit relay power and
ground supply circuit. Refer
to
(+)
(-)
Voltage (Approx.)
Connector
Terminal
M70
1
Ground
Battery voltage
2
15
SDIA2563E
Connector
Terminal
—
Continuity
M70
3
Ground
Yes
10
SDIA2564E
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