AutoCodes – Scion – B2788 Scion

B2788 Scion 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 Scion 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 664

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 Scion 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 Scion - IG2 Signal Malfunction - AutoCodes.com — B2788 Scion Code - IG2 Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC B2788 Scion?

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 Scion?

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 Scion 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.

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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 Scion Code

1. What are the common symptoms of OBDII code B2788 in a Scion related to the IG2 signal malfunction?

- Common symptoms include issues with starting the vehicle, intermittent or complete loss of power, and dashboard warning lights related to the ignition system.

2. What are the possible causes of the IG2 signal malfunction (B2788) in a Scion?

- The code B2788 can be triggered by a faulty ignition switch, damaged wiring or connectors in the ignition system, or a malfunction in the IG2 signal circuit.

3. How can I diagnose the IG2 signal malfunction in my Scion triggering the B2788 code?

- Diagnosis involves using an OBDII scanner to read the code, inspecting the ignition switch and related wiring for damage, and testing the components in the IG2 signal circuit for proper function.

4. Can a DIY enthusiast repair the IG2 signal malfunction causing the B2788 code in a Scion?

- While some simple repairs like checking and cleaning connectors or replacing a faulty ignition switch can be done by DIY enthusiasts, complex wiring issues may require professional assistance.

5. Is it safe to continue driving my Scion with the B2788 code related to the IG2 signal malfunction?

- It is not recommended to drive your vehicle with the B2788 code as it can lead to unpredictable behavior like stalling or loss of power, posing a safety risk.

6. How much does it typically cost to repair the IG2 signal malfunction in a Scion triggering the B2788 code?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Can a dead battery cause the B2788 code related to the IG2 signal malfunction in a Scion?

- A dead or weak battery can sometimes trigger the B2788 code due to insufficient power reaching the ignition system, so it's essential to ensure the battery is in good condition.

8. Are there any preventive measures I can take to avoid the IG2 signal malfunction and the B2788 code in my Scion?

- Regular maintenance of the ignition system, checking for any signs of wear or damage, and addressing electrical issues promptly can help prevent the IG2 signal malfunction and related codes.

9. Will resetting the OBDII code B2788 related to the IG2 signal malfunction make the issue go away permanently?

- Resetting the code will clear the warning light temporarily, but if the underlying issue causing the IG2 signal malfunction is not fixed, the code is likely to reappear.

10. Can a malfunction in other systems, such as the fuel system or transmission, trigger the B2788 code in a Scion?

- While the B2788 code specifically relates to the IG2 signal malfunction, issues in other systems affecting the overall electrical system of the vehicle can indirectly cause this code to appear.