C1555 (blink 55) on Toyota Corolla E120: EMPS Relay Circuit

Short answer: C1555 means “EMPS Relay Circuit”. The car’s computer has found a fault in the EMPS system and turns on the EPS (electric power steering) warning. First check: workshop check order (RM821E): CLEAR DTC -> CHECK POWER STEERING COMPUTER ASSY (EMPS ECU).

Code

C1555 · blink 55

System

EMPS

Dashboard light

EPS (electric power steering) warning

Applies to

Cars with electric power steering only. NOT fitted on PK cars: the EPC fig 4502 hydraulic vane pump covers ZZE12#..PKN and NZE120.

Market note

EMPS (electric power steering) is not fitted on PK cars; PK cars use hydraulic steering.

Confidence

high (official Toyota RM821E)

Source

toyotamanuals.gitlab.io

What to check, in order

1. Workshop check order (RM821E): CLEAR DTC -> CHECK POWER STEERING COMPUTER ASSY (EMPS ECU)

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

• C1555 · Toyota Passo (1st gen)
• C1555 on all cars compared

← C1554/54 B2795/99 →

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.