AutoCodes – Toyota – B2788 Toyota

B2788 Toyota Code - IG2 Signal Malfunction

Quick Answer

The Steering Lock ECU determines the on/off status of the engine switch through the IG2 signal circuit. Common causes include Blown IGN fuse, Faulty Steering Lock Actuator Assembly (Steering Lock ECU), Steering Lock Actuator Assembly harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2788 Toyota indicates IG2 Signal Malfunction.
Common causes: Common causes include Blown IGN fuse, Faulty Steering Lock Actuator Assembly (Steering Lock ECU), Steering Lock Actuator Assembly harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 15,632

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2788 Toyota Description

The Steering Lock ECU determines the on/off status of the engine switch through the IG2 signal circuit. After receiving an integration relay (IG2 relay) on signal, the steering lock ECU determines that the vehicle is moving. The steering lock ECU does not lock the steering when it receives the Integration Relay (IG2 relay) on the signal. This prevents the steering from being locked while the vehicle is moving. The diagnosis information of the steering lock ECU is transmitted to the Certification ECU (Smart Key ECU Assembly) as the Steering Lock ECU is not connected to the CAN communication system. The Diagnostic Trouble Code (DTC) is stored when the steering lock ECU detects an IG2 power supply malfunction.

OBDII Code B2788 Toyota - IG2 Signal Malfunction - AutoCodes.com — B2788 Toyota Code - IG2 Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC B2788 Toyota?

Blown IGN fuse
Faulty Steering Lock Actuator Assembly (Steering Lock ECU)
Steering Lock Actuator Assembly harness is open or shorted
Steering Lock Actuator Assembly circuit poor electrical connection

How to Fix the DTC B2788 Toyota?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2788 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B2788 Toyota code?

Need more information on how to fix the B2788 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2788 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B2788 2013 Toyota RAV4 — IG2 Signal Malfunction
B2788 2014 Toyota RAV4 — IG2 Signal Malfunction
B2788 2015 Toyota RAV4 — IG2 Signal Malfunction
B2788 2016 Toyota RAV4 — IG2 Signal Malfunction
B2788 2017 Toyota RAV4 — IG2 Signal Malfunction
B2788 2018 Toyota RAV4 — IG2 Signal Malfunction

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2788 Toyota Code

1. What are the common symptoms of OBDII code B2788 Toyota (IG2 Signal Malfunction)?

- Common symptoms include difficulty starting the vehicle, intermittent loss of power, and the illumination of the check engine light.

2. What are the possible causes of OBDII code B2788 Toyota?

- The code B2788 is typically caused by a faulty ignition switch, damaged wiring, or a defective IG2 relay.

3. How can I diagnose OBDII code B2788 Toyota?

- Diagnosis involves using a scan tool to read the code, inspecting the ignition system components, checking the wiring for damage, and testing the IG2 relay.

4. Can I still drive my vehicle with OBDII code B2788 Toyota?

- It is not recommended to drive the vehicle with the code B2788 present, as it can lead to potential safety hazards and further damage to the vehicle.

5. How do I repair OBDII code B2788 Toyota?

- The repair process may involve replacing the faulty ignition switch, repairing damaged wiring, or replacing the defective IG2 relay to resolve the issue.

6. Is it possible to reset OBDII code B2788 Toyota without fixing the underlying issue?

- While clearing the code temporarily may turn off the check engine light, the issue will likely reoccur until the underlying problem is properly diagnosed and repaired.

7. Can a DIY enthusiast fix OBDII code B2788 Toyota at home?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the code B2788 at home. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. How much does it typically cost to repair OBDII code B2788 Toyota at a repair shop?

- The cost of repairing OBDII code B2788 can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Will OBDII code B2788 Toyota cause any long-term damage if left unresolved?

- Ignoring OBDII code B2788 can lead to further electrical system issues, potential stalling of the vehicle, and increased risk of engine damage over time.

10. How long does it take to repair OBDII code B2788 Toyota?

- The repair time for OBDII code B2788 can vary depending on the complexity of the issue and availability of parts, but it typically takes a few hours to a full day to diagnose and fix the problem.