Nissan Frontier D22. Manual - part 355

DTC P1706 PNP SWITCH

EC-523

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7. 

CHECK PNP RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 22 and relay terminal 7.
Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F36, M81

●

Harness connectors M65, E43

●

Harness for open or short between ECM and park/neutral position (PNP) relay

>> Repair open circuit or short to ground or short to power in harness or connectors.

9. 

CHECK PARK/NEUTRAL POSITION (PNP) RELAY

1.

Apply 12V direct current between park/neutral position (PNP) relay terminals 1 and 2.

2.

Check continuity between park/neutral position (PNP) relay ter-
minals 3 and 5, 6 and 7.

OK or NG

OK

>> GO TO 10.

NG

>> Replace park/neutral position (PNP) relay.

10. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

12V (1 and 2) applied

: Continuity should exist.

No voltage applied

: Continuity should not 
exist.

SEC202B

EC-524

[KA24DE]

DTC P1775 TCC SOLENOID VALVE

DTC P1775 TCC SOLENOID VALVE

PFP:31705

System Description

UBS00DCM

The ECM controls torque converter clutch solenoid valve to cancel the lock-up condition of A/T. When the
solenoid valve is turned on,  lock-up is cancelled . When the solenoid valve is turned off, A/T lock-up is oper-
ational.
Conditions for lock-up cancel:
Torque converter clutch solenoid valve is turned “ON” when;

●

Throttle valve is fully closed (during idling or deceleration)

●

Engine coolant temperature is below 40

°C (104°F)

●

Engine is stopped

Conditions for lock-up operation:

●

Under 55 to 63 km/h (34 to 39 MPH) (2/8 throttle on flat road), lock-up does not operate even when the
torque converter clutch solenoid valve is “OFF”.

●

Over 58 to 66 km/h (36 to 41 MPH) (2/8 throttle on flat road), lock-up should operate because the torque
converter clutch solenoid valve is “OFF”.

To confirm vehicle lock-up, the torque converter clutch solenoid valve must be in operation (“ON” dur-
ing idle and deceleration, and “OFF” during acceleration) and engine speed should drop. When the
accelerator pedal is depressed (less than 2/8) in lock-up, the engine speed should not change
abruptly. If there is a big jump in engine speed, there will be no lock up.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DCN

On Board Diagnosis Logic

UBS00DCO

DTC Confirmation Procedure

UBS00DCP

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 5 seconds.

4.

If 1st trip DTC is detected, go to 

EC-526, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II”.

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor

Engine speed

Torque converter 
lock-up control

Torque converter clutch solenoid 
valve

Engine coolant temperature sensor

Engine coolant temperature

Throttle position sensor

Throttle position

 MONITOR ITEM

CONDITON

SPECIFICATION

TCC SOL/V

●

Engine: After warming up

Idle

ON

2,000 rpm

OFF

DTC No.

Trouble Diagnosis Name

DTC detecting Condition

Possible Cause

P1775

TCC solenoid valve circuit

●

An excessively low voltage from the 
solenoid is sent to ECM.

●

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

●

Torque converter clutch solenoid valve

SEF058Y

DTC P1775 TCC SOLENOID VALVE

EC-525

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Wiring Diagram

UBS00DCQ

BBWA1069E

EC-526

[KA24DE]

DTC P1775 TCC SOLENOID VALVE

Specification data are reference values and measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DCR

1. 

CHECK POWER SUPPLY

1.

Disconnect torque converter clutch (TCC) solenoid valve har-
ness connector.

2.

Turn ignition switch “ON”.

3.

Check voltage between TCC solenoid valve terminal 1 and
ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Fuse block (J/B) connector E49

●

10A fuse

●

Harness continuity between torque converter clutch solenoid valve and fuse

>> Repair harness or connectors.

TERMI-

NAL NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

115

L/Y

Torque converter clutch 
solenoid valve

[Engine is running]

●

Idle Speed

Approximately 1V

●

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm

BATTERY VOLTAGE
(11 - 14V)

SEF507V

Voltage:

Battery voltage

SEF422V