Nissan Titan. Manual — part 113
DLN-24
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
P1802 – P1804, P1809 TRANSFER CONTROL UNIT
2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate AD converter?
YES
>> Replace transfer control unit. Refer to
DLN-91, "Removal and Installation"
.
NO
>> Inspection End.
P1807 VEHICLE SPEED SENSOR (A/T)
DLN-25
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
C
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DLN
N
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P1807 VEHICLE SPEED SENSOR (A/T)
Description
INFOID:0000000009885964
The transmission control module (TCM) transmits the output shaft revolution signal via CAN communication to
Transfer control unit. DTC P1807 or flash code 2 will set when a malfunction is detected in the output shaft
revolution signal or an improper signal is input while driving.
DTC Logic
INFOID:0000000009885965
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1807 or flash code 2 detected?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009885966
1.
CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer to
TM-38, "CONSULT Function (TRANSMISSION)"
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 2.
2.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
Are the inspection results normal?
YES
>> GO TO 3.
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.
3.
CHECK DTC
Drive vehicle and then perform Self-diagnosis.
Is DTC P1807 displayed?
YES
>> Perform self-diagnosis with TCM again.
NO
>> Inspection End.
DTC
CONSULT
Diagnostic item is detected when...
Reference
[P1807]
VHCL SPEED SEN·AT
• Malfunction is detected in output shaft
revolution signalthat is output from
TCM through CAN communication.
• Improper signal is input while driving.
DLN-26
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
P1808 VEHICLE SPEED SENSOR (ABS)
P1808 VEHICLE SPEED SENSOR (ABS)
Description
INFOID:0000000009885967
The ABS actuator and electric unit (control unit) transmits a vehicle speed signal via CAN communication to
the transfer control unit. DTC P1808 or flash code 3 sets when a malfunction is detected in the vehicle speed
signal that is output from the ABS actuator and electric unit (control unit) or an improper signal is input while
driving.
DTC Logic
INFOID:0000000009885968
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1808 or flash code 3 displayed?
YES
>> Perform diagnosis procedure. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009885969
1.
CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to
.
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 2.
2.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to
Are the inspection results normal?
YES
>> GO TO 3.
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.
3.
CHECK DTC
Drive vehicle and then perform Self-diagnosis.
Is DTC P1808 displayed?
YES
>> Perform self-diagnosis with ABS actuator and electric unit (control unit).
NO
>> Inspection End.
DTC
CONSULT
Diagnostic item is detected when...
Reference
[P1808]
VHCL SPEED SEN·ABS
• Malfunction is detected in vehicle
speed signal that is output from ABS
actuator and electric unit (control unit)
through CAN communication.
• Improper signal is input while driving.
P1810 4 LO SWITCH
DLN-27
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TX15B]
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DLN
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P1810 4 LO SWITCH
Description
INFOID:0000000009885970
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:0000000009885971
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:0000000009885972
Regarding Wiring Diagram information, refer to
.
1.
CHECK 4LO POSITION SWITCH SIGNAL
With CONSULT
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT.
3. Read out the value of 4L POSI SW.
Without CONSULT
1. Start engine.
2. Check voltage between transfer control unit harness connector
terminal and ground.
OK or NG
DTC
CONSULT
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
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