Nissan Versa Sedan Service ManualTransmission & driveline » Transaxle & transmission (TM)
P0977 Shift solenoid B
P0977 Shift solenoid B
DTC Logic
DTC DETECTION LOGIC
| DTC | Trouble diagnosis name | DTC detection condition | Possible causes |
| P0977 | Shift Solenoid B Control Circuit High | The following diagnosis conditions
are met, and the TCM low
clutch solenoid valve current
monitor reading is 200 mA or
less continuously for 0.5 seconds
or more. - Diagnosis condition - Solenoid valve output current: 750 mA or more - TCM power supply voltage: 10 V < TCM power supply voltage < 16 V |
- Harness or connector
(Low clutch solenoid valve
circuit is open or shorted to
power supply.) - Low clutch solenoid valve |
DTC REPRODUCTION PROCEDURE
CAUTION: Be careful of the driving speed.
1.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.
2.CHECK DTC DETECTION
- Drive the vehicle.
- Maintain the following conditions for 5 seconds or more.
Selector lever : D position
Gear : 1GR, 2GR, 3GR
Vehicle speed : 5 km/h (4 MPH) or more
3. Stop the vehicle.
4. Check the first trip DTC.
Is "P0977" detected?
YES >> Go to TM, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK CIRCUIT BETWEEN TCM AND A/T UNIT
- Turn ignition switch OFF.
- Disconnect the TCM connector and A/T unit connector.
- Check the continuity between the TCM harness connector and the A/T unit
harness connector.
Is the check result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK LOW CLUTCH SOLENOID VALVE
Check the low clutch solenoid valve. Refer to TM, "Component Inspection (Low Clutch Solenoid Valve)".
Is the check result normal?
YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".
NO >> Repair or replace the malfunctioning parts.
Component Inspection (Low Clutch Solenoid Valve)
1.CHECK LOW CLUTCH SOLENOID VALVE
Check the resistance between the A/T unit connector and ground. 
Is the check result normal?
YES >> INSPECTION END
NO >> There is a malfunction of the low clutch solenoid valve. Replace the transaxle assembly. Refer to TM-, "Removal and Installation".