Nissan Frontier. Instruction — part 348
DLN-294
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
LOCK INDICATOR LAMP
LOCK INDICATOR LAMP
Description
INFOID:0000000009479855
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.
Component Function Check
INFOID:0000000009479856
1.
CHECK DIFF LOCK INDICATOR LAMP OPERATION
1. Turn the ignition switch ON.
2. Observe the DIFF LOCK indicator lamp.
Does the DIFF LOCK indicator lamp prove out normally?
YES
>> DIFF LOCK indicator lamp is operating normally.
NO, ALWAYS ON>> Perform self diagnostics on differential lock control unit. Refer to
TIAL LOCK CONTROL UNIT : CONSULT Function (DIFF LOCK)"
NO, ALWAYS OFF>>Check DIFF LOCK indicator lamp control circuit. Refer to
.
Diagnosis Procedure
INFOID:0000000009479857
Regarding Wiring Diagram information, refer to
1.
CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER AND GROUND SUPPLY
Check the differential lock control unit power and ground supply. Refer to
DLN-276, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning component.
2.
CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch OFF.
2. Disconnect differential lock control unit harness connector and
combination meter harness connector.
3. Check continuity between differential lock control unit harness
connector M70 (A) terminal 21 and combination meter harness
connector M24 (B) terminal 25.
4. Check continuity between differential lock control unit harness
connector M70 (A) terminal 21 and ground.
Is the inspection result normal?
Ignition switch ON
Indicator prove out
A
B
Continuity
Connector
Terminal
Connector
Terminal
M70
21
M24
25
Yes
A
—
Continuity
Connector
Terminal
M70
21
Ground
No
AWDIA0312ZZ
LOCK INDICATOR LAMP
DLN-295
< DTC/CIRCUIT DIAGNOSIS >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
YES
>> Replace combination meter. Refer to
MWI-90, "Removal and Installation"
NO
>> Repair harness or connector.
DLN-296
< ECU DIAGNOSIS INFORMATION >
[REAR FINAL DRIVE: M226 (ELD) ]
DIFFERENTIAL LOCK CONTROL UNIT
ECU DIAGNOSIS INFORMATION
DIFFERENTIAL LOCK CONTROL UNIT
Reference Value
INFOID:0000000009479858
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
(W/G)
Ground
Ign power supply
Input
Ignition ON or START
Battery voltage
2
(W/G)
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
(Y)
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
(GR)
Ground
Differential lock solenoid
(LO)
Output
Differential lock mode switch: ON
0V
Differential lock mode switch: OFF
Battery voltage
12
(L)
Ground
Differential lock solenoid
(HIGH)
Output
Differential lock mode switch: ON
0V
Differential lock mode switch: OFF
Battery voltage
13
(SB)
–
K-LINE
–
–
–
15
(R/Y)
Ground
Battery power supply
(Memory back-up)
Input
Ignition OFF
Battery voltage
20
(BR)
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
(SB)
Ground
DIFF LOCK indicator lamp
Output
DIFF LOCK indicator lamp: ON
0V
DIFF LOCK indicator lamp: OFF
Battery voltage
22
(G)
Ground
Differential lock mode switch
(OFF)
Input
Differential lock mode switch: ON
0V
Differential lock mode switch: OFF
Battery voltage
DIFFERENTIAL LOCK CONTROL UNIT
DLN-297
< ECU DIAGNOSIS INFORMATION >
[REAR FINAL DRIVE: M226 (ELD) ]
C
E
F
G
H
I
J
K
L
M
A
B
DLN
N
O
P
DTC Index
INFOID:0000000009479859
CAUTION:
If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communication
line.
Items (CONSULT screen
terms)
Diagnostic item is detected when...
Check item
INITIAL START
[P1833]
Due to removal of battery which cuts off power supply to differential
control unit, self-diagnosis memory function is suspended.
CONTROL UNIT 1
[P1834]
Malfunction is detected in the memory (RAM) system of differential
lock control unit.
CONTROL UNIT 2
[P1835]
Malfunction is detected in the memory (ROM) system of differential
lock control unit.
CONTROL UNIT 3
[P1836]
Malfunction is detected in the memory (EEPROM) system of differ-
ential lock control unit.
CONTROL UNIT 4
[P1837]
AD converter system of differential lock control unit is malfunctioning.
ON SW
[P1838]
More than two switch inputs are simultaneously detected due to
short circuit of differential lock mode switch.
POSI SW ON
[P1839]
When differential lock position switch is ON, rotation difference oc-
curs in wheel speed (rear wheel right and left).
RELAY
[P1844]
Differential lock control unit detects as irregular by comparing target
value with monitor value.
SOL CIRCUIT
[P1847]
Malfunction is detected in differential lock control unit internal circuit.
SOL DISCONNECT
[P1848]
• Differential lock solenoid internal circuit or harness is open.
• Differential lock solenoid relay does not switch to ON position.
SOL SHORT
[P1849]
Differential lock solenoid internal circuit or harness is shorted.
SOL CURRENT
[P1850]
Differential lock solenoid relay does not switch to OFF position.
ABS SYSTEM
[C1203]
Malfunction related to wheel sensor has been detected by ABS ac-
tuator and electric unit (control unit).
CAN COMM CIRCUIT
[U1000]
Malfunction has been detected from CAN communication line.
NO DTC IS DETECTED.
FURTHER TESTING MAY
BE REQUIRED.
No malfunction has been detected.
—
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