Nissan Titan A60. Instruction — part 324
P1850 SOLENOID CURRENT
DLN-235
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
Check operation by applying power and ground to the differential
lock solenoid terminals.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Check for a mechanical malfunction with the differential
lock system. Replace differential lock solenoid.
4.
CHECK DIFFERENTIAL LOCK SOLENOID CIRCUIT
1. Disconnect differential lock control unit connector.
2. Check continuity between differential lock control unit connector
B77 (A) terminals 11, 12 and differential lock solenoid connector
C17 (B) terminals 2, 4.
3. Check continuity between differential lock control unit connector
B77 (A) terminals 11, 12 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.
Component
(+)
(-)
Solenoid operation
Terminal
Terminal
Differential lock
solenoid
2
4
Yes
AWDIA0395ZZ
A
B
Continuity
Connector
Terminal
Connector
Terminal
B77
11
C17
2
Yes
12
4
A
—
Continuity
Connector
Terminal
B77
11
Ground
No
12
AWDIA0396ZZ
DLN-236
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C1203 ABS SYSTEM
C1203 ABS SYSTEM
Description
INFOID:0000000006179608
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:0000000006179609
DTC
Display contents of CONSULT-III
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
LOCK INDICATOR LAMP
DLN-237
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
LOCK INDICATOR LAMP
Description
INFOID:0000000006179610
The DIFF LOCK indicator lamp has power available to it any time the ignition switch is in the ON or START
position. The differential lock control unit supplies ground to activate the DIFF LOCK indicator lamp. The DIFF
LOCK indicator lamp will go through a prove out at initial key ON. The DIFF LOCK will flash while the differen-
tial lock system is activating or while waiting for conditions to be met to activate. Once the differential lock has
been engaged, the DIFF LOCK indicator lamp will remain ON. For more information about the DIFF LOCK
indicator lamp, refer to the Owner’s Instruction.
Diagnosis Procedure
INFOID:0000000006179611
Regarding Wiring Diagram information, refer to
1.
CHECK DIFF LOCK INDICATOR LAMP OPERATION
1. Turn the ignition switch ON.
2. Observe the DIFF LOCK indicator lamp.
Is the inspection result normal?
YES
>> DIFF LOCK indicator lamp is operating normally.
NO, ALWAYS ON>> Perform self diagnostics on differential lock control unit. Refer to
.
NO, ALWAYS OFF>>GO TO 2.
2.
CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER AND GROUND SUPPLY
Check the differential lock control unit power and ground supply. Refer to
DLN-219, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning component.
3.
CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch OFF.
2. Disconnect differential lock control unit connector and combina-
tion meter connector.
3. Check continuity between differential lock control unit connector
B77 (A) terminal 21 and combination meter connector M24 (B)
terminal 14.
4. Check continuity between differential lock control unit connector
B77 (A) terminal 21 and ground.
Is the inspection result normal?
YES
>> Check DIFF LOCK indicator lamp bulb and power supply. Refer to
NO
>> Repair harness or connector.
Ignition switch ON
Indicator prove out
Differential lock control unit
Combination meter
Continuity
Connector
Terminal
Connector
Terminal
B77
21
M24
14
Yes
Differential lock control unit
—
Continuity
Connector
Terminal
B77
21
Ground
Yes
AWDIA0397ZZ
DLN-238
< ECU DIAGNOSIS INFORMATION >
[REAR FINAL DRIVE: M226 (ELD) ]
DIFFERENTIAL LOCK CONTROL UNIT
ECU DIAGNOSIS INFORMATION
DIFFERENTIAL LOCK CONTROL UNIT
Reference Value
INFOID:0000000006179612
DIFFERENTIAL LOCK CONTROL UNIT TERMINAL CONNECTOR LAYOUT
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
SDIA2573E
Terminal No.
(Wire color)
Description
Condition
Voltage (V) (Ap-
prox.)
+
-
Signal name
Input/
Output
1
(L)
Ground
Ign power supply
Input
Ignition ON or START
Battery voltage
2
(L)
Ground
Ign power supply
Input
Ignition ON or START
Battery voltage
3
(B)
Ground
Ground
Input
Ignition ON
Less than 0.2V
4
(P)
–
CAN-L
–
–
5
(L)
–
CAN-H
–
–
9
(G)
Ground
Differential lock mode switch
(ON)
Input
Differential lock mode switch: ON
Battery voltage
Differential lock mode switch: OFF
0V
10
(B)
Ground
Ground
Input
Ignition ON
Less than 0.2V
11
(V)
Ground
Differential lock solenoid
(LO)
Output
Differential lock mode switch: ON
0V
Differential lock mode switch: OFF
Battery voltage
12
(Y)
Ground
Differential lock solenoid
(HIGH)
Output
Differential lock mode switch: ON
0V
Differential lock mode switch: OFF
Battery voltage
13
(G/W)
–
K-LINE
–
–
–
15
(Y/R)
Ground
Battery power supply
(Memory back-up)
Input
Ignition OFF
Battery voltage
20
(W/R)
Ground
Differential lock position
switch
Input
Differential lock mode switch: ON
(DIFF LOCK indicator lamp: ON)
0V
Differential lock mode switch: OFF
(DIFF LOCK indicator lamp: OFF)
Battery voltage
21
(L)
Ground
DIFF LOCK indicator lamp
Output
DIFF LOCK indicator lamp: ON
0V
DIFF LOCK indicator lamp: OFF
Battery voltage
22
(O)
Ground
Differential lock mode switch
(OFF)
Input
Differential lock mode switch: ON
0V
Differential lock mode switch: OFF
Battery voltage
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