How to Diagnose and Solve B1628 PRNDL Reverse Input Open Circuit Issues

Introduction

If you’re experiencing issues with your car’s transmission, specifically the B1628 PRNDL Reverse Input Open Circuit issue, you’re not alone. This problem can be frustrating and confusing, but with the right knowledge and tools, you can diagnose and solve the issue yourself. In this article, we’ll provide step-by-step instructions and useful tips to help you fix the problem and get your car back on the road.

What is the B1628 PRNDL Reverse Input Open Circuit Issue?

The B1628 PRNDL Reverse Input Open Circuit issue is a common problem that affects the transmission of many cars. It occurs when there is an open circuit in the reverse input signal circuit of the transmission range sensor. This can cause a variety of issues, including difficulty shifting gears, stalling, and even complete transmission failure.

Diagnosing the Issue

The first step in solving the B1628 PRNDL Reverse Input Open Circuit issue is to diagnose the problem. Here’s how to do it:

Step 1: Check the Transmission Range Sensor

The transmission range sensor is responsible for sending signals to the transmission control module (TCM) to determine the gear position. If the sensor is faulty, it can cause the B1628 PRNDL Reverse Input Open Circuit issue. To check the sensor, follow these steps:

1. Locate the transmission range sensor on your car. It’s usually located on the side of the transmission.

2. Disconnect the electrical connector from the sensor.

3. Use a multimeter to check the resistance of the sensor. The resistance should be within the manufacturer’s specifications. If it’s not, the sensor is faulty and needs to be replaced.

Step 2: Check the Wiring

If the transmission range sensor is not the issue, the next step is to check the wiring. Here’s how to do it:

1. Locate the wiring harness that connects the transmission range sensor to the TCM.

2. Inspect the wiring for any signs of damage, such as frayed wires or corrosion.

3. Use a multimeter to check the continuity of the wiring. If there is no continuity, the wiring is faulty and needs to be repaired or replaced.

Step 3: Check the TCM

If the wiring is not the issue, the problem may be with the TCM. Here’s how to check it:

1. Locate the TCM on your car. It’s usually located under the dashboard or in the engine compartment.

2. Disconnect the electrical connector from the TCM.

3. Use a multimeter to check the resistance of the TCM. The resistance should be within the manufacturer’s specifications. If it’s not, the TCM is faulty and needs to be replaced.

Solving the Issue

Once you’ve diagnosed the B1628 PRNDL Reverse Input Open Circuit issue, it’s time to solve the problem. Here’s how to do it:

Step 1: Replace the Faulty Component

If the issue is with the transmission range sensor, wiring, or TCM, you’ll need to replace the faulty component. You can purchase replacement parts from your local auto parts store or online. Follow the manufacturer’s instructions to install the new component.

Step 2: Clear the Error Code

After replacing the faulty component, you’ll need to clear the error code from the TCM. You can do this using an OBD-II scanner or by disconnecting the battery for a few minutes. Once the error code is cleared, start your car and test the transmission to ensure the issue has been resolved.

Conclusion

The B1628 PRNDL Reverse Input Open Circuit issue can be frustrating, but with the right knowledge and tools, you can diagnose and solve the problem yourself. By following the steps outlined in this article, you can get your car back on the road and avoid costly repairs.

FAQs

1. Can I drive my car with the B1628 PRNDL Reverse Input Open Circuit issue?

It’s not recommended to drive your car with this issue as it can cause further damage to your transmission. It’s best to diagnose and solve the problem as soon as possible.

2. How much does it cost to fix the B1628 PRNDL Reverse Input Open Circuit issue?

The cost of fixing this issue can vary depending on the cause of the problem and the cost of replacement parts. It’s best to get a quote from a trusted mechanic or auto repair shop.

3. How can I prevent the B1628 PRNDL Reverse Input Open Circuit issue from happening again?

Regular maintenance and inspections of your car’s transmission can help prevent this issue from happening again. It’s also important to address any transmission issues as soon as they arise to avoid further damage.