Nissan Murano: Dtc/circuit Diagnosis / P0778 Pressure Control Solenoid B
DTC DETECTION LOGIC
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| P0778 |
PC SOLENOID B (Pressure Control Solenoid “B” Electrical) |
Diagnosis condition | TCM power supply voltage: More than 11 V |
| Signal | — | ||
| Threshold | TCM judges that solenoid valve circuit is shorted to ground | ||
| Diagnosis delay time | Maintained for 1 second | ||
POSSIBLE CAUSE
-
Harness or connector (Secondary pressure solenoid valve circuit is shorted to ground)
-
Secondary pressure solenoid valve
FAIL-SAFE
-
Selector shock is large
-
Start is slow
-
Acceleration is slow
-
Lock-up is not performed
CAUTION:
Always drive vehicle at a safe speed.
PREPARATION BEFORE WORK
If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.
>>
GO TO 2.
CHECK DTC DETECTION
-
Start the engine and wait for 5 seconds or more.
-
Check the first trip DTC.
Is “P0778” detected?
YES>>Go to Diagnosis Procedure.
NO-1>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2>>Confirmation after repair: INSPECTION END
CHECK CIRCUIT BETWEEN TCM AND CVT UNIT
-
Turn ignition switch OFF.
-
Disconnect TCM connector and CVT unit connector.
-
Check continuity between TCM harness connector terminal and ground.
TCM — Continuity Connector Terminal F25 39 Ground Not existed
Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace damaged parts.
CHECK CIRCUIT BETWEEN CUT UNIT AND GROUND
Check resistance between CVT unit harness connector terminal and ground.
| CVT unit | — | Condition | Resistance | |
|---|---|---|---|---|
| Connector | Terminal | |||
| F210 | 3 | Ground | CVT fluid temperature: 20°C (68°F) | 5.5 – 7.0 Ω |
| CVT fluid temperature: 50°C (122°F) | 6.0 – 8.0 Ω | |||
| CVT fluid temperature: 80°C (176°F) | 6.5 – 8.5 Ω | |||
Is the inspection result normal?
YES>>Check intermittent incident. Refer to Intermittent Incident.
NO>>GO TO 3.
CHECK CIRCUIT BETWEEN CVT UNIT AND CONTROL VALVE
-
Disconnect control valve connector. Refer to Removal and Installation.
-
Check continuity between CVT unit harness connector terminal and ground.
CVT unit — Continuity Connector Terminal F210 3 Ground Not existed
Is the inspection result normal?
YES>>GO TO 4.
NO>>Replace terminal cord assembly. Refer to Removal and Installation.
CHECK CIRCUIT BETWEEN CONTROL VALVE AND GROUND
Check resistance between control valve harness connector terminal and ground.
| Control valve | — | Condition | Resistance |
|---|---|---|---|
| Terminal | |||
| 2 | Ground | CVT fluid temperature: 20°C (68°F) | 5.5 – 7.0 Ω |
| CVT fluid temperature: 50°C (122°F) | 6.0 – 8.0 Ω | ||
| CVT fluid temperature: 80°C (176°F) | 6.5 – 8.5 Ω |
Is the inspection result normal?
YES>>Check intermittent incident. Refer to Intermittent Incident.
NO>>There is malfunction of secondary pressure solenoid valve. Replace control valve assembly. Refer to Removal and Installation.
P0776 Pressure Control Solenoid B
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0776
PC SOLENOID B
(Pressure Control Solenoid “B” Performance/Stuck Off)
1
Diagnosis condition
When all of the following conditions are satisfied:
DTC other than the applicable DTC is not detected...
P0794 Intermediate Speed Sensor a
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0794
INTERMEDIATE SPEED SENSOR A
(Intermediate Shaft Speed Sensor "A" Circuit Intermittent)
Diagnosis condition
TCM power supply voltage: More than 11 V
Signal
—
Threshold
Primary pulley speed: more than 11820 rpm
Diagnosis delay time
Maintained 2 seconds
POSSIBLE CAUSE
Harness or connector (Primary speed sensor circuit is open or shorted)
Primary speed sensor
TCM
FAIL-SAFE
Start is slow
Acceleration is slow
Lock-up is not performed
Manual mode is not activated
Confirmation Procedure
DTC CONFIRMATION PROCEDURECAUTION:
Always drive vehicle at a safe speed...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: Diagnosis and Repair Workflow
Work Flow OVERALL SEQUENCEDETAILED FLOWINTERVIEW CUSTOMER Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred. >> GO TO 2. REPRODUCE THE MALFUNCTION Reproduce the malfunction on the Nissan Murano vehicle that the customer describes...
Nissan Murano (Z52) 2015-2024 Service Manual: Working with Grinding the Body Filler (putty)
Danger from Dust If workers continue to inhale dust generated during paint film removal or body filler grinding work for long periods, they may suffer from respiratory insufficiency, which results in pneumoconiosis or asthma. Precautions during Dust Generating Work Workers must use a sander equipped with a dust collecting function...
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Turn on the headlights, front parking, tail, license plate and instrument panel lights automatically when it is dark. Turn off all the lights (except daylight running lights) when it is light. Keep all the lights on for a period of time after you place the ignition switch in the OFF position and all doors are closed.