how to fix error code B1379 in my Toyota Camry Seventh Generation (2012-2017)

Toyota Camry Seventh Generation (2012-2017)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

Error Code: B1379

3 min read

540 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix error code B1379 related to the smart key system in Toyota Camry (2012-2017). Step-by-step guide with diagnostic procedures.

Error Code

B1379

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts.

Symptoms

•Smart key not detected by the vehicle
•Engine fails to start or requires multiple attempts to start
•Dashboard warning light for the smart key system illuminated
•Remote keyless entry features (lock/unlock) not functioning
•Intermittent operation of the smart key system

Diagnostic Steps

1
Scan the vehicle's OBD-II system to confirm the presence of the B1379 error code and check for any additional codes.
2
Inspect the smart key fob battery and replace if necessary.
3
Test the smart key fob functionality using a key fob tester or by attempting to start the vehicle with a spare key fob.
4
Check the wiring and connectors associated with the smart key system for any visible damage or corrosion.
5
Inspect the smart key antenna located in the vehicle for any signs of failure or disconnection.
6
Reset the error codes and perform a key registration procedure if needed.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Small screwdriver
•Multimeter (optional)
•Key fob tester (optional)

Parts Required

•CR2032 battery for smart key fob

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Diagnostic Steps

1
Scan the vehicle's OBD-II system to confirm the presence of the B1379 error code and check for any additional codes.
2
Inspect the smart key fob battery and replace if necessary.
3
Test the smart key fob functionality using a key fob tester or by attempting to start the vehicle with a spare key fob.
4
Check the wiring and connectors associated with the smart key system for any visible damage or corrosion.
5
Inspect the smart key antenna located in the vehicle for any signs of failure or disconnection.
6
Reset the error codes and perform a key registration procedure if needed.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface with the engine off.
Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect Key Fob

Remove the back cover from the smart key fob using a small screwdriver.
Replace the battery with a new CR2032 battery, ensuring correct polarity.
Reassemble the smart key fob and test functionality.

3. Check Wiring and Connectors

Locate the smart key system antenna, typically near the ignition switch area.
Visually inspect all wiring and connectors for damage, corrosion, or loose connections.
If any issues are found, repair or replace the affected wiring or connectors.

4. Register Smart Key

Reconnect the negative battery terminal.
Insert the smart key fob into the ignition (if applicable) and turn to the ON position without starting the engine.
Follow the manufacturer’s instructions to register the smart key using the onboard diagnostic system (may require a scan tool).

5. Clear Error Codes

Use an OBD-II scanner to clear the B1379 error code after completing the repairs.
Verify that the code does not return after clearing.