General description
30. The park/neutral position sensor located on the transmission provides information to the ECM/PCM when the shift lever is in neutral (parking) position. The computer uses this information to control the transmission's torque converter clutch (TSS), exhaust gas recirculation system (EGR) (on engines 3.1 l) and the operation of the valve for regulating the amount of air supplied at idle (IAC).
Attention! Do not start the engine with the parking/neutral position sensor disconnected: this will adversely affect the quality of the idle speed, which may lead to the submission of a false code 24 (malfunction in the vehicle speed sensor circuit).
31. When the gear lever is placed in the neutral or parking position, the sensor closes on "mass", and when the gear is turned on, it opens (see illustrations).
4.31a. Installation location of the park/neutral position sensor and its electrical connector on the 3.1L engine | 4.31b. Parking/neutral position sensor installation location and its electrical connector on the 3.8L engine |
32. To check the technical condition of this unit, a special SCAN device is required, so if it malfunctions, take it to the nearest specialized workshop for diagnostics.
Adjustment
33. To adjust the park/neutral position sensor, place the shift lever in the park position.
34. Loosen the casing mounting bolts, after which the rear wall of the casing should turn on the axis, opening access to the sensor adjustment mechanism.
Replacement
35. Before replacing the sensor, set the gearshift lever to neutral.
36. Disconnect electrical connectors.
37. Having unscrewed a lock nut of the lever of a choice of transfers, take the lever from a transmission.
38. Mark the position of the sensor on the gearbox with paint.
39. Having turned away bolts, take the gauge from a transmission.
40. Install the notched spacer ring in line with the gear selector on the gearbox.
41. Push down on the sensor to engage the lever.
42. With the shift lever in the parking position, adjust the sensor.
43. Connect electrical connectors.