Nissan Pathfinder (2005 year). Instruction — part 24
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
AT-163
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2005 Pathfinder
Diagnostic Procedure
UCS003QI
1.
CHECK INPUT SIGNALS
With CONSULT-II
1.
Start the engine.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.
3.
Drive vehicle in the “1” or “2” position (1
1
or 2
2
” gear), and con-
firm the ON/OFF actuation of the “ATF PRES SW 2” and “ON
OFF SOL”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-233, "Control Valve With TCM and A/T Fluid
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
●
Refer to
AT-162, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
SCIA4794E
AT-164
DTC P1841 ATF PRESSURE SWITCH 1
2005 Pathfinder
DTC P1841 ATF PRESSURE SWITCH 1
PFP:25240
Description
UCS0036O
Fail-safe function to detect front brake clutch solenoid valve condition.
CONSULT-II Reference Value
UCS0036P
On Board Diagnosis Logic
UCS0036Q
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1841 ATF PRES SW 1/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 1
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
UCS0036R
●
ATF pressure switch 1
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
UCS0036S
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd
Þ
4th Gear (FR/B ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3.
Perform step “2” again.
4.
Turn ignition switch “OFF”, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1841) is detected, go to
AT-165, "Diagnostic Procedure"
.
If DTC (P1757) is detected, go to
AT-149, "Diagnostic Procedure"
.
Item name
Condition
Display value
ATF PRES SW 1
Front brake engaged. Refer to
.
ON
Front brake disengaged. Refer to
.
OFF
BCIA0030E
DTC P1841 ATF PRESSURE SWITCH 1
AT-165
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M
A
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AT
2005 Pathfinder
Diagnostic Procedure
UCS003QJ
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Drive vehicle in the “D” position (3rd
Þ
4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 1”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-233, "Control Valve With TCM and A/T Fluid
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
●
Refer to
AT-165, "Diagnostic Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
PCIA0067E
AT-166
DTC P1843 ATF PRESSURE SWITCH 3
2005 Pathfinder
DTC P1843 ATF PRESSURE SWITCH 3
PFP:25240
Description
UCS0036U
Fail-safe function to detect input clutch solenoid valve condition.
CONSULT-II Reference Value
UCS0036V
On Board Diagnosis Logic
UCS0036W
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1843 ATF PRES SW 3/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 3
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
UCS0036X
●
ATF pressure switch 3
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
UCS0036Y
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd
Þ
4th Gear (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3.
Perform step “2” again.
4.
Turn ignition switch “OFF”, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1843) is detected, go to
AT-167, "Diagnostic Procedure"
.
If DTC (P1752) is detected, go to
AT-145, "Diagnostic Procedure"
.
Item name
Condition
Display value
ATF PRES SW 3
Input clutch engaged. Refer to
.
ON
Input clutch disengaged. Refer to
.
OFF
BCIA0030E
DTC P1843 ATF PRESSURE SWITCH 3
AT-167
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AT
2005 Pathfinder
Diagnostic Procedure
UCS003QK
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Drive vehicle in the “D” position (3rd
Þ
4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 3”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-233, "Control Valve With TCM and A/T Fluid
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
●
Refer to
AT-167, "Diagnostic Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
PCIA0067E
AT-168
DTC P1845 ATF PRESSURE SWITCH 5
2005 Pathfinder
DTC P1845 ATF PRESSURE SWITCH 5
PFP:25240
Description
UCS00370
Fail-safe function to detect direct clutch solenoid valve condition.
CONSULT-II Reference Value
UCS00371
On Board Diagnosis Logic
UCS00372
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1845 ATF PRES SW 5/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 5
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
UCS00373
●
ATF pressure switch 5
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
UCS00374
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 1st
Þ
2nd Gear (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3.
Perform step “2” again.
4.
Turn ignition switch “OFF”, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1845) is detected, go to
AT-169, "Diagnostic Procedure"
.
If DTC (P1762) is detected, go to
AT-153, "Diagnostic Procedure"
.
Item name
Condition
Display value
ATF PRES SW 5
Direct clutch engaged. Refer to
.
ON
Direct clutch disengaged. Refer to
.
OFF
BCIA0030E
DTC P1845 ATF PRESSURE SWITCH 5
AT-169
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E
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G
H
I
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K
L
M
A
B
AT
2005 Pathfinder
Diagnostic Procedure
UCS003QL
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Drive vehicle in the “D” position (1st
Þ
2nd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 5”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-233, "Control Valve With TCM and A/T Fluid
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
●
Refer to
AT-168, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
PCIA0067E
AT-170
DTC P1846 ATF PRESSURE SWITCH 6
2005 Pathfinder
DTC P1846 ATF PRESSURE SWITCH 6
PFP:25240
Description
UCS00376
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference Value
UCS00377
On Board Diagnosis Logic
UCS00378
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1846 ATF PRES SW 6/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible Cause
UCS00379
●
ATF pressure switch 6
●
Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation Procedure
UCS0037A
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd
Þ
3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3.
Perform step “2” again.
4.
Turn ignition switch “OFF”, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1846) is detected, go to
AT-171, "Diagnostic Procedure"
.
If DTC (P1767) is detected, go to
AT-157, "Diagnostic Procedure"
.
Item name
Condition
Display value
ATF PRES SW 6
High and low reverse clutch engaged. Refer to
.
ON
High and low reverse clutch disengaged. Refer to
.
OFF
BCIA0030E
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