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Nissan Pathfinder (2005 year). Manual - part 23

DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION

AT-155

2005 Pathfinder

Diagnostic Procedure

UCS003QE

CHECK INPUT SIGNALS

With CONSULT-II

Start engine.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.

Drive vehicle in the “D” position (1st

2nd gear), and confirm

the display actuation of the “ATF PRES SW 5” and electrical cur-
rent value of “D/C SOLENOID”.

OK or NG

>> GO TO 4.

>> GO TO 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-

CUIT"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

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

>> Replace the control valve with TCM. Refer to

AT-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to

AT-154, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

SCIA4797E

AT-156

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

2005 Pathfinder

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

PFP:31940

Description

UCS00360

High and low reverse clutch solenoid valve is controlled 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-II Reference Value

UCS00361

On Board Diagnosis Logic

UCS00362

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1767 HLR/C SOL/CIRC” with CONSULT-II or 8th judgement flicker without
CONSULT-II is detected under the following conditions.

–

When TCM detects an improper voltage drop when it tries to operate the solenoid valve.

–

When TCM detects as irregular by comparing target value with monitor value.

Possible Cause

UCS00363

●

Harness or connectors
(The solenoid circuit is open or shorted.)

●

High and low reverse clutch solenoid valve

DTC Confirmation Procedure

UCS00364

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

Turn ignition switch “ON”. (Do not start engine.)

Select “DATA MONITOR” mode for “A/T” with CONSULT-II.

Start engine.

Drive vehicle and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd

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.

If DTC is detected, go to

AT-157, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II”.

Item name

Condition

Display value (Approx.)

HLR/C SOL

High and low reverse clutch disengaged. Refer to

AT-19

0.6 - 0.8 A

High and low reverse clutch engaged. Refer to

AT-19

0 - 0.05 A

BCIA0030E

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

AT-157

2005 Pathfinder

Diagnostic Procedure

UCS003QF

CHECK INPUT SIGNAL

With CONSULT-II

Turn ignition switch ON.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.

Start the engine.

Read out the value of “HLR/C SOLENOID” while driving.

OK or NG

>> GO TO 4.

>> GO TO 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-

CUIT"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

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

>> Replace the control valve with TCM. Refer to

AT-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to

AT-156, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

SCIA4793E

AT-158

DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION

2005 Pathfinder

DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION

PFP:31940

Description

UCS00366

●

High and low reverse clutch solenoid valve is controlled 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 mal-
function such as control valve sticking, improper solenoid valve operation.

CONSULT-II Reference Value

UCS00367

On Board Diagnosis Logic

UCS00368

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1769 HLR/C SOL FNCTN” with CONSULT-II 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 6 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 6 is irregular
during releasing accelerator pedal. (Other than during shift change)

Possible Cause

UCS00369

●

Harness or connectors
(The solenoid and switch circuits are open or shorted.)

●

High and low reverse clutch solenoid valve

●

ATF pressure switch 6

DTC Confirmation Procedure

UCS0036A

CAUTION:

Always drive vehicle at a safe speed.

WITH CONSULT-II

Start engine.

Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd

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.

Perform step “2” again.

Turn ignition switch “OFF”, then perform step “1” to “3” again.

Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1769) is detected, refer to

AT-159, "Diagnostic Procedure"

If DTC (P1767) is detected, go to

AT-157, "Diagnostic Procedure"

If DTC (P1846) is detected, go to

AT-171, "Diagnostic Procedure"

Item name

Condition

Display value (Approx.)

HLR/C SOL

High and low reverse clutch disengaged. Refer to

AT-19

0.6 - 0.8 A

High and low reverse clutch engaged. Refer to

AT-19

0 - 0.05 A

ATF PRES SW 6

High and low reverse clutch engaged. Refer to

AT-19

High and low reverse clutch disengaged. Refer to

AT-19

OFF

BCIA0030E

DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION

AT-159

2005 Pathfinder

WITH GST

Follow the procedure “WITH CONSULT-II”.

Diagnostic Procedure

UCS003QG

CHECK INPUT SIGNALS

With CONSULT-II

Start the engine.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.

Drive vehicle in the “D” position (2nd

3rd gear), and confirm

the ON/OFF actuation of the “ATF PRES SW 6” and electrical
current value of “HLR/C SOL”.

OK or NG

>> GO TO 4.

>> GO TO 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-

CUIT"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

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

>> Replace the control valve with TCM. Refer to

AT-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to

AT-158, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

SCIA4798E

AT-160

DTC P1772 LOW COAST BRAKE SOLENOID VALVE

2005 Pathfinder

DTC P1772 LOW COAST BRAKE SOLENOID VALVE

PFP:31940

Description

UCS0036C

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-II Reference Value

UCS0036D

On Board Diagnosis Logic

UCS0036E

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1772 LC/B SOLENOID/CIRC” with CONSULT-II or 7th judgement flicker with-
out CONSULT-II is detected when TCM detects an improper voltage drop when it tries to operate the sole-
noid valve.

Possible Cause

UCS0036F

●

Harness or connectors
(The solenoid circuit is open or shorted.)

●

Low coast brake solenoid valve

DTC Confirmation Procedure

UCS0036G

WITH CONSULT-II

Turn ignition switch “ON”. (Do not start engine.)

Select “DATA MONITOR” mode for “ENGINE” with CONSULT-II.

Start engine.

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)

If DTC is detected, go to

AT-161, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II”.

Item name

Condition

Display value

ON OFF SOL

Low coast brake engaged. Refer to

AT-19

Low coast brake disengaged. Refer to

AT-19

OFF

BCIA0030E

DTC P1772 LOW COAST BRAKE SOLENOID VALVE

AT-161

2005 Pathfinder

Diagnostic Procedure

UCS003QH

CHECK INPUT SIGNAL

With CONSULT-II

Turn ignition switch ON.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.

Start the engine.

Read out the value of “ON OFF SOL” while driving.

OK or NG

>> GO TO 4.

>> GO TO 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-

CUIT"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

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

>> Replace the control valve with TCM. Refer to

AT-233, "Control Valve With TCM and A/T Fluid

Temperature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform “DTC Confirmation Procedure”.

●

Refer to

AT-160, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

SCIA4794E

AT-162

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

2005 Pathfinder

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

PFP:31940

Description

UCS0036I

●

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 mal-
function such as control valve sticking, improper solenoid valve operation.

CONSULT-II Reference Value

UCS0036J

On Board Diagnosis Logic

UCS0036K

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-II 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

UCS0036L

●

Harness or connectors
(The solenoid and switch circuits are open or shorted.)

●

Low coast brake solenoid valve

●

ATF pressure switch 2

DTC Confirmation Procedure

UCS0036M

CAUTION:

Always drive vehicle at a safe speed.