IG2 Signal Malfunction
Table of contents
B2788 TOYOTA Possible Causes
- Faulty Steering Lock Actuator Assembly (Steering Lock ECU)
- Faulty IGN fuse
- Faulty IG2 MAIN fuse
- Faulty Integration Relay (IG2 relay)
- Faulty Main Body ECU
How do I fix code B2788 TOYOTA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B2788 TOYOTA code
The cost of diagnosing the B2788 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
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 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 Techstream via 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) sets when there is an open or short in the IG2 signal circuit.