C1554 (blink 54) on Toyota Corolla E120: EMPS Relay Circuit

Short answer: C1554 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): CHECK POWER STEERING COMPUTER ASSY (EMPS ECU) -> CHECK POWER STEERING RELAY (EMPS) -> CHECK FUSE (EMPS).

Code

C1554 · blink 54

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

Symptoms and when it is set

1. Open or short circuit of EMPS relay circuit is detected

Likely causes

1. EMPS relay; EMPS ECU; EMPS relay circuit

What to check, in order

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

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

• C1554 · Toyota Passo (1st gen)
• C1554 on all cars compared

← C1553/53 C1555/55 →

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.