B2780 (blink 15) on Toyota Passo (KGC10): Key switch OFF malfunction

Short answer: B2780 means “Key switch OFF malfunction”. The car’s computer has found a fault in the Immobilizer system and turns on the Security (immobiliser) indicator. First check: follow manual section procedure for this code.

Code

B2780 · blink 15

System

Immobilizer

Dashboard light

Security (immobiliser) indicator

Also sold as

Daihatsu Boon, Daihatsu Sirion (M300)

Applies to

M300/M301 export; JDM Boon/Passo 1st gen by platform

Confidence

high (factory chart); description parsing medium

Source

carmanualsclub.com

Symptoms and when it is set

1. Warning lamp per chart (see page)

Likely causes

1. Key switch OFF malfunction

What to check, in order

1. Follow manual section procedure for this code

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

← B2796/12 B2795/21 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.