Nissan Titan A60. Instruction — part 321
P1837 CONTROL UNIT 4
DLN-223
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
P1837 CONTROL UNIT 4
Description
INFOID:0000000006179586
Replace the differential lock control unit if this DTC is displayed. Refer to
DLN-253, "Removal and Installation"
.
DTC Logic
INFOID:0000000006179587
DTC
Display contents of CONSULT-III
DTC Detection Condition
Action to take
P1837
CONTROL UNIT 4
[P1837]
The AD converter system of the differential lock control
unit is malfunctioning.
DLN-224
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
P1838 ON SWITCH
P1838 ON SWITCH
Description
INFOID:0000000006179588
The differential lock mode switch sends differential lock ON/OFF signals to the differential lock control unit.
DTC Logic
INFOID:0000000006179589
Diagnosis Procedure
INFOID:0000000006179590
Regarding Wiring Diagram information, refer to
1.
CHECK DIFFERENTIAL LOCK MODE SWITCH OPERATION
1. Turn ignition switch ON.
2. Using CONSULT-III, select “D-LOCK SW SIG” of DIFF LOCK data monitor items.
3. While operating the differential lock mode switch, check that the display value changes between ON/OFF.
Is the inspection result normal?
YES
>> Differential lock mode switch is operating properly.
NO
>> GO TO 2.
2.
CHECK DIFFERENTIAL LOCK MODE SWITCH POWER SUPPLY CIRCUIT
1. Disconnect differential lock mode switch connector.
2. Turn ignition switch ON.
3. Check voltage between differential lock mode switch connector
M72 terminal 3 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK DIFFERENTIAL LOCK MODE SWITCH SIGNAL
DTC
Display contents of CONSULT-III
DTC Detection Condition
Action to take
P1838
ON SW
[P1838]
Two switch inputs were simultaneously detected due to a
short circuit in the differential lock mode switch.
Inspect the differential lock
mode switch. Refer to
Switch ON
Display item ON
Switch OFF
Display item OFF
(+)
(-)
Voltage (Approx.)
Connector
Terminal
M72
3
Ground
Battery voltage
SDIA2534E
P1838 ON SWITCH
DLN-225
< DTC/CIRCUIT 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 connector.
3. Check voltage between differential lock control unit connector
B77 terminals 9, 22 and ground.
Is the inspection result normal?
YES
>> Replace the differential lock control unit. Refer to
DLN-253, "Removal and Installation"
.
NO
>> GO TO 4.
4.
CHECK DIFFERENTIAL LOCK MODE SWITCH
1. Turn ignition switch OFF.
2. Disconnect differential lock mode switch 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 connector
B77 (A) terminals 9, 22 and differential lock mode switch con-
nector M72 (B) terminals 2, 1.
2. Check continuity between differential lock control unit connector
B77 (A) terminals 9, 22 and ground.
Is the inspection result normal?
YES >> Replace the differential lock control unit. Refer to
DLN-253, "Removal and Installation"
.
NO
>> Repair harness or connector.
(+)
(-)
Differential lock mode
switch
Voltage (Approx.)
Connector
Terminal
B77
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
B77 (A)
9
M72 (B)
2
Yes
22
1
Connector
Terminal
Ground
Continuity
B77 (A)
9
No
22
ALDIA0165ZZ
DLN-226
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
P1839 POSITION SWITCH ON
P1839 POSITION SWITCH ON
Description
INFOID:0000000006179591
The differential lock position switch sends a signal to the differential lock control module when the differential
lock is engaged. The differential lock control module monitors the left and right rear wheel speed sensor sig-
nals to determine wheel slippage. When the differential lock is engaged the left and right rear wheel speed
sensor signals should match.
DTC Logic
INFOID:0000000006179592
Diagnosis Procedure
INFOID:0000000006179593
Regarding Wiring Diagram information, refer to
1.
CHECK DIFFERENTIAL LOCK POSITION SWITCH SIGNAL
1. Start engine.
2. 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
C16.
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 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-254, "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 mod-
ule detects a difference between left and right rear wheel
speeds.
Inspect the differential lock
position switch. Refer to
DLN-226, "Diagnosis Proce-
dure"
.
Monitor item
Condition
Display value
D-LOCK POS SW SIG
• Vehicle stopped
• Engine running
• VDC OFF switch (if
equipped): 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
AWDIA0436ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст