2001 Dodge Durango Transmission Range Sensor Prevent Car Starting
What is a Transmission Range Sensor?
A transmission range sensor (TRS) is a device that tells the engine control module (ECM) what gear the transmission is in. This information is used by the ECM to control the engine’s idle speed, shift timing, and torque converter lockup. The TRS is located on the transmission case and is connected to the shift lever.
How Does a Transmission Range Sensor Work?
The TRS works by using a series of switches to indicate the position of the shift lever. When the shift lever is in park, the TRS will send a signal to the ECM indicating that the transmission is in park. When the shift lever is moved to drive, the TRS will send a signal to the ECM indicating that the transmission is in drive. And so on.
What Happens When a Transmission Range Sensor Fails?
If the TRS fails, the ECM will not be able to tell what gear the transmission is in. This can cause a number of problems, including:
- The engine may idle too high or too low
- The transmission may not shift properly
- The torque converter may not lock up
- The car may not start
How to Test a Transmission Range Sensor
If you are experiencing any of the problems listed above, it is possible that the TRS has failed. To test the TRS, you will need a multimeter. Follow these steps:
1. Disconnect the electrical connector from the TRS.
2. Set the multimeter to the ohms setting.
3. Touch one probe of the multimeter to each of the terminals on the TRS.
4. The multimeter should read open (infinite resistance) when the shift lever is in park.
5. The multimeter should read closed (0 ohms) when the shift lever is in any other gear.
How to Replace a Transmission Range Sensor
If the TRS has failed, it will need to be replaced. To replace the TRS, you will need a new TRS, a wrench, and a screwdriver. Follow these steps:
1. Disconnect the electrical connector from the TRS.
2. Remove the bolts that hold the TRS to the transmission case.
3. Remove the TRS from the transmission case.
4. Install the new TRS into the transmission case.
5. Tighten the bolts that hold the TRS to the transmission case.
6. Connect the electrical connector to the TRS.
Conclusion
The transmission range sensor is an important part of the transmission system. If the TRS fails, it can cause a number of problems, including preventing the car from starting. If you are experiencing any problems with your car’s transmission, it is possible that the TRS has failed. You can test the TRS using a multimeter and, if necessary, replace it yourself.
