DTC DETECTION LOGIC

DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause
P0850 | Park/neutral position switch | The signal of the park/neutral position (PNP) signal dose not change during driving after the engine is started. |

- Harness or connectors
  [The park/neutral position (PNP) signal circuit is open or shorted.]
- TCM

DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES>>GO TO 2.
NO>>GO TO 5.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

>>GO TO 3.
3.CHECK PNP SIGNAL
With CONSULT-III

1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-III. Then check the “P/N POSI SW” signal under the following conditions.

   Position (Selector lever) | Known-good signal
   N or P position | ON
   Except above position | OFF

Is the inspection result normal?
YES>>GO TO 4.
NO>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
4.PERFORM DTC CONFIRMATION PROCEDURE

1. Select “DATA MONITOR” mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 50 consecutive seconds.
   ■ CAUTION ■
   Always drive vehicle at a safe speed.

   ENG SPEED | 1,400 - 6,375 rpm
   COOLAN TEMP/S | More than 70 °C (158 °F)
   B/FUEL SCHDL | 2.0 - 31.8 msec
   VHCL SPEED SE | More than 64 km/h (40 MPH)
   Selector lever | Suitable position

4. Check 1st trip DTC.

Is 1st trip DTC detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO>>INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to Component Function Check (GT-R certified NISSAN dealer).
NOTE：
Use component function check to check the overall function of the park/neutral position (PNP) signal circuit. During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).