Prndl range selector location 03 bonaville - 2003 Pontiac Bonneville

evolution

1. some unsafe cars super old PRNDL on the shifter itself.(hand)
2. then moved to outside of tranny box, more safe.
3. and last super safe, inside the box are PRNDL switches.
4. and last the switches are pressure sensors.max safe.

yours are I guess, #3 or #4 but no told so not possible to be sure.

other names (p/n) park/neutral switch/
PRNDL
or TRS, transmission range switches.
if confused post the VIN or ask the dealer to decode your VIN
and tell you where parts are located. BINGO
or buy the service manual?
or tell what car this is. fully.?

The standard instrument cluster contains a microprocessor. The instrument panel cluster (IPC) microprocessor communicates with other controllers in the vehicle over the Class 2 serial data bus. The information passed over the Class 2 bus, along with direct external connections to other controllers and devices provides the inputs that are used to operate all of the gauges and the illuminated displays in the cluster. Some displays and gauges are operated directly by external sources (devices or controllers) and others are under software control of the IPC. As the IPC microprocessor runs the operating software, the microprocessor continuously processes Class 2 data in order to determine the correct values and states to display.


PRNDL Indicator (Park Reverse Neutral Drive Low)
The PRNDL display is a variable function electronic display located in the IPC. The PRNDL display is capable of displaying PRND321. The display electronically illuminates, or lights the back of the desired character in order to indicate the gear selection in the transmission. The IPC controls the PRNDL by use of the Class 2 messages that are received from the PCM/VCM. The vehicles with automatic transmissions have an electronic park reverse neutral drive low (PRNDL) range indicator. The system uses the signals from the neutral safety back up (NSBU) switch on the side of the transmission. Signals from this switch determine which LED is in the electronic PRNDL will light. The system is electronic. No internal adjustment is needed. Refer to Transmission/Transaxle for diagnostic information.

Hi Michael.
The Neutral Safety Switch is part of the P R N D L range selector switch located on the Transmission. Hope this helps.

The proper thing to do would be to hook up a factory or professional type scanner an check input data to the PCM from the Transmission internal mode switch . Error means the instrument cluster is loosing data from the PCM - engine computer .

The lever assembly-manual shaft detent with internal mode switch (IMS) is a sliding contact electrical switch assembly that corresponds to the PRNDL position selected. Each of the PRNDL positions has a unique ground pattern on four wires from the PCM.
The assembly consists of two major components:
• The internal mode switch that consists of:
- The housing (1), which makes up the stationary contacts.
- The insulator (2), which makes up the moving contacts and is secured on the detent lever (4).
• The lever assembly which consists of:
- The manual shaft (3)
- The detent lever (4)
The range detection is accomplished by securing the moving contacts to the detent lever. When the driver selects a PRNDL position, the detent lever inside the transmission rotates. This rotates the insulator which in turn grounds the four wires in a unique pattern for each gear selection, corresponding to the PRNDL position selected. The IMS is electrically connected by five wires (four of which the PCM supplies voltage to and one wire that is a common ground) to the transmission pass through connector.


Range Selector Displays Incorrect Range
The transmission internal mode switch (IMS) is a sliding contact switch attached to the selector detent inside the transmission side cover. The four inputs to the PCM indicate the position of the transmission range selector. The input voltage level at the PCM is high, B+, when the IMS is open and low when the switch is closed to ground. The four input parameters represented are Signals A, B, C and P, Parity. Refer to Transmission Internal Mode Switch Logic .
Install a scan tool.
Turn ON the ignition, with the engine OFF.
Select IMS on the scan tool.
Place the range selector in each transmission range: P, R, N, D4, D3, D2 and D1.
Does each range selected match the scan tool IMS display?
--
Go to Intermittent Conditions in Engine Controls - 3.4L
Go to Step 2
2
Select IMS A/B/C/P on the scan tool.
Place the range selector in each transmission range: P, R, N, D4, D3, D2 and D1.
Does the IMS A/B/C/P display the specified values for each range?

Your best bet , take your vehicle to a qualified repair shop.

It's probably a bad internal mode switch . The sensor is input to the PCM - engine computer .
The lever assembly-manual shaft detent with internal mode switch (IMS) is a sliding contact electrical switch assembly that corresponds to the PRNDL position selected. Each of the PRNDL positions has a unique ground pattern on four wires from the PCM.
The assembly consists of two major components:
• The internal mode switch that consists of:
- The housing (1), which makes up the stationary contacts.
- The insulator (2), which makes up the moving contacts and is secured on the detent lever (4).
• The lever assembly which consists of:
- The manual shaft (3)
- The detent lever (4)
The range detection is accomplished by securing the moving contacts to the detent lever. When the driver selects a PRNDL position, the detent lever inside the transmission rotates. This rotates the insulator which in turn grounds the four wires in a unique pattern for each gear selection, corresponding to the PRNDL position selected. The IMS is electrically connected by five wires (four of which the PCM supplies voltage to and one wire that is a common ground) to the transmission pass through connector.

Range Selector Displays Incorrect Range

The transmission internal mode switch (IMS) is a sliding contact switch attached to the selector detent inside the transmission side cover. The four inputs to the PCM indicate the position of the transmission range selector. The input voltage level at the PCM is high, B+, when the IMS is open and low when the switch is closed to ground. The four input parameters represented are Signals A, B, C and P, Parity. Refer to Transmission Internal Mode Switch Logic .
1
Install a scan tool.
Turn ON the ignition, with the engine OFF.
Select IMS on the scan tool.
Place the range selector in each transmission range: P, R, N, D4, D3, D2 and D1.
Does each range selected match the scan tool IMS display?
--
Go to Powertrain Control Module Replacement in Engine Controls - 3.1L or Intermittent Conditions in Engine Controls - 3.8L
Go to Step 2
2
Select IMS A/B/C/P on the scan tool.
Place the range selector in each transmission range: P, R, N, D4, D3, D2 and D1.
Does the IMS A/B/C/P display the specified values for each range?
HI/HI/HI/HI
Go to Step 12
Go to Step 3

Your best bet , take it to a qualified repair shop !

Code P0705 - Transmisson Range Sensor Circuit (PRNDL Input)
The transmission range switch detects the selector lever position and sends a signal to the TCM.

The park/neutral position (PNP) switch includes a transmission range switch. The transmission range switch detects the selector lever position when the shift lever is in the N or P shift position and sends a signal to the Transmission Control Module (TCM).

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
- Open or short park/neutral position switch circuit
- Poor park/neutral position switch circuit connection
- Misadjusted park/neutral position switch
- Park/neutral position switch may be faulty

Keep us updated (remember to rate thsi answer).

Transmission Range Sensor "A" Circuit (PRNDL Input) check the connector at the transmission switch if ok replace the range selector switch

I would check the neutral safety switch. It's located on the shift shaft of the transmission and is known to go bad

03 Town Car transmission whines & taps on very hot days only, changed fluid filter, trans cooler & radiator. Runs great on cool on days under 90 degress.