Nissan Pathfinder (2005 year). Instruction — part 25
DTC P1846 ATF PRESSURE SWITCH 6
AT-171
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2005 Pathfinder
Diagnostic Procedure
UCS003QM
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Start the 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 (2nd
Þ
3rd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 6”.
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-170, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
PCIA0067E
AT-172
MAIN POWER SUPPLY AND GROUND CIRCUIT
2005 Pathfinder
MAIN POWER SUPPLY AND GROUND CIRCUIT
PFP:00100
Wiring Diagram — AT — MAIN
UCS003QN
BCWA0386E
MAIN POWER SUPPLY AND GROUND CIRCUIT
AT-173
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2005 Pathfinder
TCM terminals and data are reference value. Measured between each terminal and ground.
Diagnostic Procedure
UCS003QO
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.
Terminal
Wire
color
Item
Condition
Data (Approx.)
1
R/B
Power supply
(Memory back-up)
Always
Battery voltage
2
R/B
Power supply
(Memory back-up)
Always
Battery voltage
5
B
Ground
Always
0V
6
W/G
Power supply
–
Battery voltage
–
0V
10
B
Ground
Always
0V
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
AT-174
MAIN POWER SUPPLY AND GROUND CIRCUIT
2005 Pathfinder
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
PG-4, "POWER SUPPLY ROUTING CIRCUIT"
.
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.
3.
Check continuity between A/T assembly harness connector ter-
minals and ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
5.
DETECT MALFUNCTIONING ITEM
Check the following.
●
The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
.
OK or NG
OK
>> INSPECTION END
NG-1
>> Self-diagnosis does not activate: GO TO 7.
NG-2
>> DTC is displayed: Check the malfunctioning system. Refer to
.
Item
Connector
Terminal
Continuity
TCM
F9
5, 10 - Ground
Yes
SCIA2106E
MAIN POWER SUPPLY AND GROUND CIRCUIT
AT-175
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2005 Pathfinder
7.
CHECK TERMINAL CORD ASSEMBLY
1.
Remove control valve with TCM. Refer to
AT-233, "Control Valve With TCM and A/T Fluid Temperature
.
2.
Disconnect A/T assembly harness connector and TCM connector.
3.
Check continuity between A/T assembly harness connector ter-
minals and TCM connector terminals.
4.
Check continuity between A/T assembly harness connector ter-
minals and TCM connector terminals.
5.
If OK, check harness for short to ground and short to power.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-233, "Control Valve With TCM and A/T Fluid
.
NG
>> Replace open circuit or short to ground and short to power in harness or connectors.
Item
Connector
Terminal
Voltage
A/T assembly harness connector
F9
1
Yes
TCM connector
F502
9
A/T assembly harness connector
F9
2
Yes
TCM connector
F502
10
A/T assembly harness connector
F9
6
Yes
TCM connector
F502
4
SCIA5464E
Item
Connector
Terminal
Voltage
A/T assembly harness connector
F9
5
Yes
TCM connector
F504
21
A/T assembly harness connector
F9
10
Yes
TCM connector
F504
22
SCIA5465E
AT-176
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
2005 Pathfinder
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
PFP:18002
CONSULT-II Reference Value
UCS0037C
Diagnostic Procedure
UCS0037D
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
.
Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
AT-100, "DTC U1000 CAN COMMUNICATION LINE"
.
NO
>> GO TO 2.
2.
CHECK THROTTLE POSITION SIGNAL CIRCUIT
With CONSULT-II
1.
Turn ignition switch “ON”. (Do not start engine.)
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
Depress accelerator pedal and read out the value of “CLSD THL
POS” and “W/O THL POS”.
OK or NG
OK
>> INSPECTION END
NG
>> Check the following. If NG, repair or replace damaged
parts.
●
Perform the self-diagnosis for “ENGINE” with CON-
SULT-II.
●
Open circuit or short to ground or short to power in harness or connectors.
●
Pin terminals for damage or loose connection with harness connector.
Item name
Condition
Display value
CLSD THL POS
Released accelerator pedal.
ON
Fully depressed accelerator pedal.
OFF
W/O THL POS
Fully depressed accelerator pedal.
ON
Released accelerator pedal.
OFF
PCIA0070E
BRAKE SIGNAL CIRCUIT
AT-177
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2005 Pathfinder
BRAKE SIGNAL CIRCUIT
PFP:25320
CONSULT-II Reference Value
UCS0037E
Diagnostic Procedure
UCS0037F
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
.
Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
AT-100, "DTC U1000 CAN COMMUNICATION LINE"
.
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH CIRCUIT
With CONSULT-II
1.
Turn ignition switch “ON”. (Do not start engine.)
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
Read out ON/OFF switching action of the “BRAKE SW”.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch harness connector termi-
nals 1 and 2.
Check stop lamp switch after adjusting brake pedal — refer to
.
OK or NG
OK
>> INSPECTION END
NG
>> Check the following. If NG, repair or replace damaged parts.
●
Harness for short or open between battery and stop lamp switch.
●
Harness for short or open between stop lamp switch and combination meter.
Item name
Condition
Display value
BRAKE SW
Depressed brake pedal.
ON
Released brake pedal.
OFF
PCIA0070E
Item
Connector
Condition
Terminal
Continuity
Stop lamp
switch har-
ness con-
nector
E38
When brake pedal is
depressed
1 - 2
Yes
When brake pedal is
released
No
SCIA2144E
AT-178
OVERDRIVE CONTROL SWITCH
2005 Pathfinder
OVERDRIVE CONTROL SWITCH
PFP:25130
CONSULT-II Reference Value
UCS0040Q
Diagnostic Procedure
UCS0040P
1.
CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to
AT-87, "SELF-DIAGNOSTIC RESULT MODE"
.
Is any malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
AT-100, "DTC U1000 CAN COMMUNICATION LINE"
.
NO
>> GO TO 2.
2.
CHECK OVERDRIVE CONTOROL SWITCH CIRCUIT
With CONSULT-II
1.
Turn ignition switch “ON”.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
Read out “OD CONT SW”.
Check the signal of the overdrive control switch is indicated
properly.
Without CONSULT-II
1.
Turn ignition switch “ON”. (Do not start engine)
2.
Check voltage between A/T control device connector terminal and ground.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 3.
Item name
Condition
Display value
OD CONT SW
Releasing overdrive control switch
OFF
Holding overdrive control switch
ON
Monitor item
Condition
Display value
OD CONT SW
Releasing overdrive control switch
OFF
Holding overdrive control switch
ON
LCIA0339E
Item
Connector
No.
Terminal No.
Condition
Data
(Approx.)
Overdrive
control switch
M156
7 - Ground
Releasing overdrive
control switch
Battery
voltage
Holding overdrive
control switch
0V
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