Nissan Titan A60. Manual — part 272
P1810 4 LO SWITCH
DLN-27
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
C
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DLN
N
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P
P1810 4 LO SWITCH
Description
INFOID:0000000006179445
The 4LO switch detects that the transfer case is in 4LO range. DTC P1810 or flash code 6 will set when an
improper signal from the 4LO switch is input due to an open or short circuit.
DTC Logic
INFOID:0000000006179446
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1810 or flash code 6 displayed?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000006179447
Regarding Wiring Diagram information, refer to
.
1.
CHECK 4LO POSITION SWITCH SIGNAL
With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out the value of 4L POSI SW.
Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
OK or NG
DTC
CONSULT-III
Diagnostic item is detected when...
Reference
[P1810]
4L POSI SW TF
Improper signal from 4LO switch is input
due to open or short circuit.
Condition
Display value
• Vehicle stopped
• Engine running
• A/T selector lever N position
• Brake pedal depressed
4WD shift switch: 4LO
ON
Except the above
OFF
Connector
Terminal
Condition
Voltage
(Approx.)
E142
24 -
Ground
• Vehicle stopped
• Engine running
• A/T selector lever
N position
• Brake pedal de-
pressed
4WD shift switch: 4LO
0V
Except the above
Battery
voltage
SDIA3363E
DLN-28
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
P1810 4 LO SWITCH
OK
>> GO TO 5.
NG
>> GO TO 2.
2.
CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND 4LO SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the 4LO switch harness connector.
3. Check continuity between transfer control unit harness connec-
tor E142 terminal 24 and 4LO switch harness connector F60 ter-
minal 13.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect 4LO switch harness connector.
3. Check continuity between 4LO switch harness connector F60
terminal 12 and ground.
Also check harness for short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to power in harness or con-
nectors.
4.
CHECK 4LO SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect 4LO switch harness connector.
3. Remove 4LO switch. Refer to
DLN-12, "Component Parts Location"
.
4. Push and release 4LO switch and check continuity between
4LO switch terminals 12 and 13.
OK or NG
OK
>> GO TO 5.
NG
>> Replace 4LO switch.
5.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
OK or NG
OK
>> GO TO 6.
NG
>> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
6.
CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
Continuity should exist.
SDIA3364E
Continuity should exist.
PDIA0203E
Terminal
Condition
Continuity
12 - 13
Push 4LO switch
Yes
Release 4LO switch
No
PDIA0204E
P1810 4 LO SWITCH
DLN-29
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
C
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H
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DLN
N
O
P
OK
>> Inspection End.
NG
>> Replace transfer control unit. Refer to
DLN-93, "Removal and Installation"
.
Component Inspection
INFOID:0000000006179448
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect 4LO switch harness connector.
3. Remove 4LO switch. Refer to
DLN-12, "Component Parts Location"
.
4. Push and release 4LO switch and check continuity between
4LO switch terminals 12 and 13.
5. If the inspection results are not normal replace the 4LO switch.
Terminal
Condition
Continuity
12 - 13
Push 4LO switch
Yes
Release 4LO switch
No
PDIA0204E
DLN-30
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
P1813 4WD SHIFT SWITCH
P1813 4WD SHIFT SWITCH
Description
INFOID:0000000006179449
The 4WD shift switch allows the driver to select 2WD or 4WD and 4H or 4LO. DTC P1813 or flash code 9 will
set if more than two switch inputs are simultaneously detected by the transfer control unit due to a short circuit
in the 4WD shift switch.
DTC Logic
INFOID:0000000006179450
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1813 or flash code 9 displayed?
YES
>> Perform diagnosis procedure. Refer to
DLN-30, "Diagnosis Procedure (With 3 Control Dial Sys-
DLN-32, "Diagnosis Procedure (With 2 Control Dial System or Auto A/
.
NO
>> Inspection End.
Diagnosis Procedure (With 3 Control Dial System Without Auto A/C)
INFOID:0000000006179451
Regarding Wiring Diagram information, refer to
.
1.
CHECK 4WD SHIFT SWITCH SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out ON/OFF switching action of the 2WD SWITCH, 4H SWITCH, 4L SWITCH with operating 4WD
shift switch.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between transfer control unit harness connector
terminals and ground.
DTC
CONSULT-III
Diagnostic item is detected when...
Reference
[P1813]
4WD MODE SW
More than two switch inputs are simulta-
neously detected due to short circuit of
4WD shift switch.
DLN-30, "Diagnosis Procedure (With 3
Control Dial System Without Auto A/C)"
or,
DLN-32, "Diagnosis Procedure (With 2
Control Dial System or Auto A/C)"
SDIA3365E
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