C1531 (blink 31) on Toyota Passo (KGC10): EPS ECU internal circuit

Short answer: C1531 means “EPS ECU internal circuit”. The car’s computer has found a fault in the EPS system and turns on the Power steering (EPS) warning light. First check: follow manual section procedure for this code.

Code

C1531 · blink 31

System

EPS

Dashboard light

Power steering (EPS) warning light

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. EPS ECU internal circuit

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

Same code on other cars

• C1531 · Toyota Corolla (9th gen, E120)
• C1531 on all cars compared

← C1524/24 C1532/32 →

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.