Nissan Versa Sedan Service ManualTransmission & driveline » Transaxle & transmission (TM)
P0979 Shift solenoid C
P0979 Shift solenoid C
DTC Logic
DTC DETECTION LOGIC
| DTC | Trouble diagnosis name | DTC detection condition | Possible causes |
| P0979 | Shift Solenoid C Control Circuit Low | The following diagnosis conditions
are met, and the current
monitor reading of the TCM 2-4
brake solenoid valve is 200 mA
or less continuously for 0.5 seconds
or more. - Diagnosis condition - Solenoid valve output current: 750 mA or more - GND short circuit diagnosis occurs in the solenoid valve drive circuit. - TCM power supply voltage: 10 V < TCM power supply voltage < 16 V |
- Harness or connector
(Short circuit to ground in the
2-4 brake solenoid valve circuit) - 2-4 brake 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 : 2 position
Gear : 2GR
Vehicle speed : 20 km/h (13 MPH) or more
- Stop the vehicle.
- Check the first trip DTC.
Is "P0979" 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 TCM harness connector and ground.
Is the check result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK 2-4 BRAKE SOLENOID VALVE
Check the 2-4 brake solenoid valve. Refer to TM, "Component Inspection (2-4 Brake 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 (2-4 Brake Solenoid Valve)
1.CHECK 2-4 BRAKE 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 2-4 brake solenoid valve. Replace the transaxle assembly. Refer to TM, "Removal and Installation".