DTC DETECTION LOGIC

DTC | Self-diagnosis name | DTC detection condition | Possible cause
P2846 | Shift fork "B" position sensor incorrect neutral position indicated | A DTC is set if the status of the sleeve A2 position of more than 1.7 mm (0.067 in) or less than −1.7 mm (−0.067 in) is detected for a certain period of time when the sleeve A2 position target is neutral with the sleeve A1 engaged in the 6th gear.

- 2nd-4th position sensor
- Shift solenoid valve 1
- Shift solenoid valve 2
- Sequence solenoid valve
- Harness or connector
  (Open or short in the 2nd-4th position sensor circuit)
  (Open or short in the shift solenoid valve 1 circuit)
  (Open or short in the shift solenoid valve 2 circuit)
  (Open or short in the sequence solenoid valve circuit)

DTC CONFIRMATION PROCEDURE
■ CAUTION ■

- If CONSULT-III is not available, “Diagnosis Procedure (GT-R certified NISSAN dealer)” must be performed before starting “DTC CONFIRMATION PROCEDURE”.
- If CONSULT-III is not available, never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause secondary malfunction.
- Be careful of the driving speed.

1.PREPARATION BEFORE OPERATION (PART 1)
If another “DTC CONFIRMATION PROCEDURE” is performed just before the next test, turn the ignition switch OFF and wait for 10 seconds or more, then perform the next test.
>>GO TO 2.
2.PREPARATION BEFORE OPERATION (PART 2)
With CONSULT-III

1. Turn the ignition switch ON.
2. Select “FLUID TEMP” in “Data Monitor”.

Is the oil temperature −20°C (−4°F) or more?
YES>>GO TO 3.
NO>>Warm up the transmission.
3.PREPARATION BEFORE OPERATION (PART 3)
With CONSULT-III
Select “READ CLUTCH GEAR LEARNING DATA” in “Work support”.
Is the “2-4 learning experienced” YES?
YES>>GO TO 4.
NO>>Perform “CLUTCH GEAR LEARNING”.
4.CONFIRMATION BEFORE OPERATION (PART 1)
With CONSULT-III
Select “SLEEVE A2 POSI” in “Data Monitor”.
Is the numeral value of the “SLEEVE A2 POSI” in the range between −1.8 and 1.8 mm (−0.071 and 0.071 in)?
YES>>GO TO 5.
NO>>GO TO 7.
5.CONFIRMATION BEFORE OPERATION (PART 2)
With CONSULT-III

1. Shift the shift lever to the N position.
2. Start the engine.
3. Select “GEAR POSITION TEST” in “Work support”.
4. Select “GEAR2”.
   ■ CAUTION ■
   Never select “GEAR6” or “GEAR N”.

Does the sleeve A2 operate?
YES>>GO TO 6.
NO>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
6.CONFIRMATION BEFORE OPERATION (PART 3)
With CONSULT-III

1. Select “GEAR POSITION TEST” in “Work support”.
2. Select “GEAR4”.
   ■ CAUTION ■
   Never select “GEAR6” or “GEAR N”.

Does the sleeve A2 operate?
YES>>GO TO 7.
NO>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
7.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III

1. Run the vehicle in 5th gear of M range for 2 seconds or more.
2. Check “Self Diagnostic Result” of “TRANSMISSION”.

Without CONSULT-III

1. Run the vehicle in 5th gear of M range for 2 seconds or more.
2. Check self-diagnosis.

Is DTC P2846 detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO>>Go to Intermittent Incident.