how to fix P0700 code in Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0700

3 min read

518 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 P0700 transmission issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0700

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before opening the transmission system.

Symptoms

•Check engine light illuminated
•Transmission slipping or harsh shifting
•Delayed engagement when shifting from park to drive
•Poor fuel economy
•Transmission failure to enter specific gears

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0700 and any additional transmission-related codes.
2
Inspect the transmission fluid level and condition; check for contamination or burning smell.
3
Examine the wiring and connectors leading to the transmission control module (TCM) for damage or corrosion.
4
Check the TCM for any signs of malfunction, including software issues or internal faults.
5
Perform a visual inspection of the transmission for leaks or physical damage.
6
Test the transmission solenoids for proper operation and response.

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
•Socket set
•Multimeter
•Fluid pump
•Torque wrench

Parts Required

•Transmission fluid (specific to Toyota specifications)
•Transmission Control Module (if diagnosed as faulty)
•Transmission filter (if applicable)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0700 and any additional transmission-related codes.
2
Inspect the transmission fluid level and condition; check for contamination or burning smell.
3
Examine the wiring and connectors leading to the transmission control module (TCM) for damage or corrosion.
4
Check the TCM for any signs of malfunction, including software issues or internal faults.
5
Perform a visual inspection of the transmission for leaks or physical damage.
6
Test the transmission solenoids for proper operation and response.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, multimeter, fluid pump, transmission fluid, torque wrench.
Ensure the vehicle is on a flat surface and the engine is off. Disconnect the battery to prevent electrical shock.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission drain plug using a socket set and drain the old fluid into a suitable container.
2. Inspect the fluid for discoloration or debris. Replace with new transmission fluid if necessary (consult owner's manual for specifications).
3. Reinstall the drain plug and torque to manufacturer specifications.

3. Inspect and Repair Wiring/Connectors

Sub-steps:
1. Visually inspect wiring harnesses and connectors for any signs of wear, fraying, or corrosion.
2. Use a multimeter to check for continuity and voltage at the TCM connector.
3. Repair or replace any damaged wiring or connectors as needed.

4. Test and Replace Transmission Control Module (if required)

Sub-steps:
1. If the wiring is intact and the fluid is in good condition, check the TCM for faults.
2. If diagnostics indicate TCM failure, remove the old TCM by disconnecting the harness and unbolting it.
3. Install the new TCM, ensuring all connections are secure and correctly aligned. Torque the bolts to specifications.

5. Reconnect Battery and Clear Codes

Reconnect the battery and use the OBD-II scanner to clear any stored codes.