By Ezra Lane The P1703 code indicates a malfunction in the brake switch circuit of Nissan vehicles, which compromises the Communication with the Transmission Control Module (TCM). Common symptoms include delayed gear engagement, unusual shifting behavior, and illumination of the Check Engine Light. Causes often stem from faulty brake switch components, damaged wiring, or poor electrical connections. Diagnosing this code requires an OBD-II scanner and visual inspections. Repair typically involves replacing faulty switches or wiring. Regular maintenance checks are essential to prevent recurrence, ensuring safety and reliability. Exploring further can provide insights into related issues and repair options.
P1703 Nissan Code Meaning
The P1703 Nissan code indicates a malfunction in the brake switch circuit, affecting communication with the transmission control module (TCM).
This can cause erratic shifting and impact performance.
Inspect and test the brake switch, wiring, and connections, replacing faulty components to restore proper transmission operation.
Error Code P1703 Symptoms
Drivers with the P1703 Nissan code may notice several signs of trouble with the brake switch circuit. The brake switch is important for communication between the transmission control module and the vehicle's transmission. If this communication fails, it can cause performance issues.
Here are some common symptoms of the P1703 code:
- Delayed gear engagement: You might feel a lag when shifting from park to drive or the other way around, making driving less convenient.
- Check Engine Light on: The dashboard light will be on, alerting you that the vehicle needs attention due to a fault in the brake switch circuit.
- Lower fuel efficiency: Problems between the brake switch and transmission can lead to worse performance, which may cause higher fuel usage.
- Slipping gears: The vehicle might change gears unexpectedly or have trouble staying in the selected gear, resulting in a bumpy ride.
Noticing these symptoms early can help avoid further problems and ensure the vehicle runs well and safely.
Causes of Nissan P1703 Fault Code
The P1703 fault code in Nissan vehicles usually points to problems with the brake switch circuit. This circuit is important for how the transmission system works. If the brake switch isn't working right, it can make it difficult to shift gears or cause erratic behavior when trying to engage gears.
Here are some common reasons for the P1703 brake switch circuit fault:
- Faulty brake switch components: If the brake switch is broken, it might not send the right signals to the Transmission Control Module (TCM).
- Wiring issues: Wires that are damaged or worn in the brake switch circuit can interrupt signal transmission, leading to communication problems with the TCM.
- Poor electrical connections: Connections that are corroded or loose can create intermittent issues, affecting how well the circuit functions.
- Sensor misalignment: If the brake switch is not installed correctly or is misaligned, it can malfunction and disrupt smooth gear shifting.
The brake switch circuit must work properly for the TCM to get accurate signals, which affects how the vehicle performs.
Checking the P1703 code involves looking closely at the brake switch and the wiring to ensure they have proper continuity and voltage supply.
Tools Needed to Diagnose
To diagnose the P1703 fault code, you need some specific tools. These tools help find and fix problems in the brake switch circuit.
Here's a list of what you'll need:
- Multimeter: This tool measures voltage and resistance in the brake switch circuit. It helps find electrical problems that could cause the P1703 code.
- OBD-II Scanner: This device retrieves the P1703 code and any related trouble codes from the vehicle's computer. It gives you a clear picture of the vehicle's electronic system.
- Scan Tool with Live Data Capabilities: This advanced tool lets you monitor brake switch signals while driving. It checks if the system works correctly in real-time.
- Wiring Diagram: A wiring diagram for your specific vehicle model is important. It shows the layout of the brake switch circuit, which helps with troubleshooting.
Using these tools will help you diagnose the P1703 code effectively and address any underlying issues.
How to Fix P1703 Nissan Error Code – Step by Step
Fixing the P1703 Nissan error code involves a systematic approach to identify and resolve issues within the brake switch circuit. Follow these steps for an effective resolution:
Step 1: Conduct a Diagnostic Scan
Begin by performing a diagnostic scan to confirm the presence of the P1703 error code. This step is crucial to ensure accurate identification of the issue at hand.
Step 2: Inspect the Brake Switch and Wiring
Examine the brake switch and its wiring for any signs of damage, corrosion, or poor connections that may disrupt the electrical signal to the Transmission Control Module (TCM).
Pay special attention to the connectors, as intermittent connections can lead to erroneous readings.
Step 3: Check the Power Supply
Verify the power supply to the brake switch, ensuring it receives the correct voltage without interruptions. Utilize a multimeter to measure voltage levels accurately.
Step 4: Replace Faulty Components
If any faults are detected in the brake switch or wiring, replace the defective components.
After completing the necessary repairs, clear the error code from the vehicle's computer.
Step 5: Retest the System
After clearing the error code, retest the system to confirm that the issue has been resolved.
If the brake switch and wiring are in satisfactory condition, consider reprogramming or updating the TCM's software, as this may be essential to rectify the error code if the hardware appears functional.
Common Diagnosis Mistakes
Common diagnosis mistakes can make it hard to fix the P1703 Nissan error code. Getting the diagnosis right depends on understanding how the system works.
Here are some common mistakes that can lead technicians astray and slow down repairs:
- Not considering the brake switch can cause wrong signals to go to the Transmission Control Module (TCM).
- Forgetting to check the power and ground connections at the TCM can lead to wrong conclusions. Technicians might think the TCM is the problem when it's really an electrical issue.
- Some technicians skip checking for software problems in the TCM. They might think the P1703 code is only about hardware issues, which can hide the real problem.
- Inspecting the TCM wiring harness for corrosion or damage is often overlooked, leading to the wrong belief about the TCM's functionality.
These mistakes can lead to replacing parts that don't need to be changed and can drive up repair costs.
P1703 Nissan Repair Cost
Fixing the P1703 error code in a Nissan can cost between $200 and $800. The price varies based on what's wrong and what repairs are needed.
If you go to a dealership or a big city, the labor costs can be higher than at an independent shop.
If the issue is with the Transmission Control Module (TCM), the repair might be more expensive. A new TCM can range from $300 to $600, not including the cost of labor.
You will also likely need a professional diagnostic scan to determine the problem, which can add another $100 to $200.
The overall cost depends on how serious the damage is. Sometimes, a software update or reprogramming the TCM can be cheaper options than replacing it completely.
It's a good idea to get several quotes to understand the potential costs. Fixing the P1703 code quickly can help avoid bigger problems later on.
Related Error Codes on Nissan
When diagnosing the P1703 error code in a Nissan, it's helpful to look at other related error codes. These codes can give you more information about the problem. The P1703 code usually points to issues with the brake switch circuit, which can affect how the transmission works.
Two important related codes are P0571 and P1700. The P0571 code indicates a problem in the brake switch circuit. This means the brake switch might not be working correctly. If this happens, the Transmission Control Module (TCM) may not communicate well with the braking system, which can affect how the car shifts gears. The P1700 code refers to general issues with transmission control, suggesting that there may be broader problems alongside the P1703 code.
To diagnose these issues effectively, check for these related codes during a diagnostic scan. This helps identify multiple problems that might be happening at the same time. Fixing these issues can make repairs easier and help prevent more complications later.
| Error Code | Description |
|---|---|
| P0571 | Brake switch circuit malfunction |
| P1700 | General transmission control issues |
Can I drive safely with P1703 Nissan?
Driving with the P1703 code in a Nissan can be unsafe.
It means there might be a problem with the brake switch, which can cause the car to shift gears oddly. This can lead to losing control.
It's best to get it checked by a mechanic right away.
People Also Ask
What Vehicles Are Commonly Affected by the P1703 Code?
The P1703 code usually affects some Nissan cars, like the Altima, Sentra, and Maxima from 2000 to 2006. It can also show up in some Infiniti cars, like the G35 and FX35, and older Nissan trucks.
How Can I Reset the P1703 Error Code?
To reset the P1703 error code, first fix the problem that caused it. Then, use an OBD-II scanner to delete the code or take out the car battery for about 15 minutes to clear the code.
Is P1703 Related to Other Brake System Issues?
Yes, the P1703 code can mean there are problems with the brake system, especially with the brake switch. If the brake switch doesn't work right, it can cause strange behavior in the car's transmission and make it unsafe to drive.
Can Low Brake Fluid Trigger the P1703 Code?
Low brake fluid doesn't cause the P1703 code by itself. But if the brake fluid is low, it might make the brake switch not work right. This can cause problems in the car's transmission system, which could lead to the P1703 code showing up.
What Is the Warranty Coverage for P1703 Repairs?
Warranty coverage for repairs related to the P1703 code usually lasts 3 to 5 years or covers 60,000 to 100,000 miles. This depends on the car brand and specific warranty rules. Always check your vehicle's warranty for exact details.