Nissan Pathfinder (2008 year). Manual — part 594
TM-94
< COMPONENT DIAGNOSIS >
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
Description
INFOID:0000000001282902
Low coast brake solenoid valve is turned “ON” or “OFF” by the TCM in response to signals sent from the PNP
switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001282903
On Board Diagnosis Logic
INFOID:0000000001282904
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1772 LC/B SOLENOID/CIRC” with CONSULT-III or 7th judgement flicker without
CONSULT-III is detected when TCM detects an improper voltage drop when it tries to operate the solenoid
valve.
Possible Cause
INFOID:0000000001282905
• Harness or connectors
(The solenoid circuit is open or shorted.)
• Low coast brake solenoid valve
DTC Confirmation Procedure
INFOID:0000000001282906
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-III
1.
Turn ignition switch “ON”. (Do not start engine.)
2.
Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.
3.
Start engine.
4.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
Selector lever: “1” or “2”
Gear position: “1st” or “2nd” gear (LC/B ON/OFF)
5.
If DTC is detected, go to
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis Procedure
INFOID:0000000001282907
1.
CHECK INPUT SIGNAL
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3.
Start the engine.
4.
Read out the value of “ON OFF SOL” while driving.
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
Item name
Condition
Display value
ON OFF SOL
Low coast brake engaged. Refer to
ON
Low coast brake disengaged. Refer to
.
OFF
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
TM-95
< COMPONENT DIAGNOSIS >
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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 connector.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
TM-199, "Control Valve with TCM and A/T Fluid
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
• Refer to
TM-94, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
TM-96
< COMPONENT DIAGNOSIS >
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
Description
INFOID:0000000001282908
• Low coast brake solenoid valve is turned “ON” or “OFF” by the TCM in response to signals sent from the
PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will
then be shifted to the optimum position.
• This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunc-
tion such as control valve sticking, improper solenoid valve operation.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001282909
On Board Diagnosis Logic
INFOID:0000000001282910
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-III or 7th judgement flicker without
CONSULT-III is detected under the following conditions.
- When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 2 is irregular during depressing accelerator pedal. (Other than during shift change)
- When TCM detects that relation between gear position and condition of ATF pressure switch 2 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible Cause
INFOID:0000000001282911
• Harness or connectors
(The solenoid and switch circuits are open or shorted.)
• Low coast brake solenoid valve
• ATF pressure switch 2
DTC Confirmation Procedure
INFOID:0000000001282912
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-III
1.
Start engine.
2.
Accelerate vehicle to maintain the following conditions.
Selector lever: “1” or “2” position
Gear position: “1st” or “2nd” gear (LC/B ON/OFF)
3.
Perform step “2” again.
4.
Turn ignition switch “OFF”, then perform step “1” to “3” again.
5.
Check “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-III. If DTC (P1774) is
detected, refer to
If DTC (P1772) is detected, go to
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name
Condition
Display value
ON OFF SOL
Low coast brake engaged. Refer to
ON
Low coast brake disengaged. Refer to
.
OFF
ATF PRES SW 2
Low coast brake engaged. Refer to
ON
Low coast brake disengaged. Refer to
.
OFF
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
TM-97
< COMPONENT DIAGNOSIS >
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Diagnosis Procedure
INFOID:0000000001282913
1.
CHECK INPUT SIGNALS
With CONSULT-III
1.
Start the engine.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3.
Drive vehicle in the “1” or “2” position (1
1
or 2
2
” gear), and confirm 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
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 connector.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
TM-199, "Control Valve with TCM and A/T Fluid
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform “DTC Confirmation Procedure”.
• Refer to
TM-96, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
TM-98
< COMPONENT DIAGNOSIS >
DTC P1815 MANUAL MODE SWITCH
DTC P1815 MANUAL MODE SWITCH
Description
INFOID:0000000001724547
Manual mode switch is installed in A/T device. It sends manual mode switch, shift up and shift down switch
signals to TCM.
TCM sends the switch signals to combination meter and A/C amp. By CAN communication line. Then manual
mode switch position is indicated on the A/T position indicator. For inspection, refer to
Indicator Lamp Does Not Come On (With Manual Mode)"
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001724548
On Board Diagnosis Logic
INFOID:0000000001724549
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1815 MANU MODE SW/CIRC” with CONSULT-III is detected when TCM monitors
Manual mode, Non manual mode, Up or Down switch signal, and detects as irregular when impossible input
pattern occurs 1 second or more.
Possible Cause
INFOID:0000000001724550
• Harness or connectors
(These switches circuit is open or shorted.)
• Manual mode select switch (Into control device)
• Manual mode position select switch (Into control device)
DTC Confirmation Procedure
INFOID:0000000001724551
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-III
1.
Turn ignition switch ON.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3.
Start engine.
4.
Move selector lever to “M” position.
5.
Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
MANU MODE SW: ON
6.
If DTC is detected, go to
Diagnosis Procedure
INFOID:0000000001724553
1.
CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to
TM-35, "CONSULT-III Function (TRANSMISSION)"
Item name
Condition
Display Value
MANU MODE SW
Manual shift gate position (neutral)
ON
Other than the above
OFF
NON M-MODE SW
Manual shift gate position
OFF
Other than the above
ON
UP SW LEVER
Selector lever: + side
ON
Other than the above
OFF
DOWN SW LEVER
Selector lever: - side
ON
Other than the above
OFF
DTC P1815 MANUAL MODE SWITCH
TM-99
< COMPONENT DIAGNOSIS >
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Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
NO
>> GO TO 2.
2.
CHECK MANUAL MODE SWITCH CIRCUIT
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3.
Read out ON/OFF switching action of “MANU MODE SW”, “NON M-MODE SW”, “UP SW LEVER”,
“DOWN SW LEVER”.
Without CONSULT-III
Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the
position mutually coincide when the selector lever is shifted to the “+ (up)” or “- (down)” side (1st
⇔
5th gear).
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
• Manual mode switch. Refer to
TM-100, "Component Inspection"
.
• Pin terminals for damage or loose connection with harness connector.
• Open circuit or short to ground or short to power in harness or connector for A/T device (manual mode
switch).
• Combination meter. Refer to
MWI-4, "METER SYSTEM : System Description"
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform
TM-98, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 5.
5.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
Item name
Condition
Display Value
MANU MODE SW
Manual shift gate position (neutral)
ON
Other than the above
OFF
NON M-MODE SW
Manual shift gate position
OFF
Other than the above
ON
UP SW LEVER
selector lever: +side
ON
Other than the above
OFF
DOWN SW LEVER
selector lever: -side
ON
Other than the above
OFF
TM-100
< COMPONENT DIAGNOSIS >
DTC P1815 MANUAL MODE SWITCH
OK
>> Replace control valve with TCM. Refer to
TM-199, "Control Valve with TCM and A/T Fluid Tem-
.
NG
>> Repair or replace damaged parts.
Component Inspection
INFOID:0000000001724554
MANUAL MODE SWITCH
Check continuity between terminals.
Item
Position
Terminal
Continuity
Manual mode select switch
Auto
9 – 10
Yes
Manual
6 – 9
Manual mode position select switch
UP
8 – 9
DOWN
7 – 9
SCIA2112E
MAIN POWER SUPPLY AND GROUND CIRCUIT
TM-101
< COMPONENT DIAGNOSIS >
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MAIN POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000001282939
1.
CHECK TCM POWER SOURCE STEP 1
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
3.
Check voltage between A/T assembly harness connector termi-
nals and ground.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK TCM POWER SOURCE STEP 2
1.
Disconnect A/T assembly harness connector.
2.
Turn ignition switch ON. (Do not start engine.)
3.
Check voltage between A/T assembly harness connector termi-
nals and ground.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
• Harness for short or open between battery and A/T assembly harness connector terminals 1, 2
• Harness for short or open between ignition switch and A/T assembly harness connector terminal 6
• 10A fuse (No. 22, located in the fuse and fusible link block) and 10A fuse (No. 49, located in the IPDM E/R)
• Ignition switch. Refer to
.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
4.
CHECK TCM GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly harness connector.
Item
Connector
Terminal
Voltage
TCM
F9
1 - Ground
Battery voltage
2 - Ground
6 - Ground
0V
SCIA2104E
Item
Connector
Terminal
Voltage
TCM
F9
1 - Ground
Battery voltage
2 - Ground
6 - Ground
SCIA2105E
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