Nissan Frontier D40. Manual — part 252
P1810 4 LO SWITCH
DLN-29
< COMPONENT DIAGNOSIS >
[TRANSFER: TX15B]
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A
B
DLN
N
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P
YES
>> GO TO 5.
NO
>> 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 M152 terminal 24 and 4LO switch harness connector F60
terminal 13.
Also check harness for short to ground and short to power.
Is there continuity?
YES
>> GO TO 3.
NO
>> 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.
Is there continuity?
YES >> GO TO 4.
NO
>> 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-13, "Component Parts Location"
4.
Push and release 4LO switch and check continuity between
4LO switch terminals 12 and 13.
Are the inspection results normal?
YES
>> GO TO 5.
NO
>> Replace 4LO switch.
5.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
Are the inspection results normal?
YES
>> GO TO 6.
NO
>> 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
Drive the vehicle and then perform self-diagnosis.
Is DTC P1810 displayed?
Continuity should exist.
SDIA3364E
Continuity should exist.
PDIA0203E
Terminal
Condition
Continuity
12 - 13
Push 4LO switch
Yes
Release 4LO switch
No
PDIA0204E
DLN-30
< COMPONENT DIAGNOSIS >
[TRANSFER: TX15B]
P1810 4 LO SWITCH
YES
>> Replace transfer control unit. Refer to
DLN-13, "Component Parts Location"
.
NO
>> Inspection End.
Component Inspection
INFOID:0000000005275429
1.
Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2.
Disconnect 4LO switch harness connector.
3.
Remove 4LO switch. Refer to
DLN-13, "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
P1813 4WD SHIFT SWITCH
DLN-31
< COMPONENT DIAGNOSIS >
[TRANSFER: TX15B]
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P1813 4WD SHIFT SWITCH
Description
INFOID:0000000005275430
The 4WD shift switch allows the driver to select 2WD or 4WD and 4H or 4LO. DTC P1813 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:0000000005275431
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Perform self-diagnosis.
Is DTC P1813 displayed?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000005275432
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.
Are the inspection results normal?
YES
>> GO TO 5.
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.
Connector
Terminal
Condition
Voltage (Ap-
prox.)
M152
14 - Ground
4WD shift switch: 2WD
Battery voltage
4WD shift switch: 4H and 4LO
0V
15 - Ground
4WD shift switch: 4H
Battery voltage
4WD shift switch: 2WD and 4LO
0V
16 - Ground
4WD shift switch: 4LO
Battery voltage
4WD shift switch: 2WD and 4H
0V
SDIA3365E
DLN-32
< COMPONENT DIAGNOSIS >
[TRANSFER: TX15B]
P1813 4WD SHIFT SWITCH
NO
>> GO TO 2.
2.
CHECK 4WD SHIFT SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2.
Disconnect 4WD shift switch harness connector.
3.
Check voltage between 4WD shift switch harness connector ter-
minal 1 and ground.
4.
Turn ignition switch “ON”. (Do not start engine.)
5.
Check voltage between 4WD shift switch harness connector ter-
minal 1 and ground.
Is there voltage?
YES
>> GO TO 3.
NO
>> 1.
Check harness for short or open between 4WD shift
switch harness connector terminal 1 and transfer
shut off relay 2 harness connector E157 terminal 5
and 10A fuse (No. 58 located in the fuse and relay box). If any items are damaged, repair or
replace damaged parts.
2.
Perform trouble diagnosis for power supply circuit. Refer to
3.
CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER CONTROL UNIT
1.
Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2.
Disconnect transfer control unit harness connector and the 4WD shift switch harness connector.
3.
Check continuity between the following terminals.
-
Transfer control unit harness connector M152 terminal 14 and
4WD shift switch harness connector M141 terminal 3.
-
Transfer control unit harness connector M152 terminal 15 and
4WD shift switch harness connector M141 terminal 5.
-
Transfer control unit harness connector M152 terminal 16 and
4WD shift switch harness connector M141 terminal 6.
Also check harness for short to ground and short to power.
Is there continuity?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK 4WD SHIFT SWITCH
1.
Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2.
Remove 4WD shift switch harness connector.
Connector
Terminal
Voltage (Approx.)
M141
1 - Ground
0V
SDIA2803E
Connector
Terminal
Voltage (Approx.)
M141
1 - Ground
Battery voltage
SDIA2802E
Continuity should exist.
SDIA3366E
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