DTC    C1552/22    PIG Power Supply Voltage Malfunction

DTC    C1554/23    Power Supply Relay Failure

for Preparation Click here


DESCRIPTION

When a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop the power assist. The ECU must be replaced when there is a problem with the relays because each relay is built into the ECU.

DTC No.
DTC Detection Condition
Trouble Area
C1552/22
PIG power source circuit malfunction
  1. EPS fuse
  2. PIG power source circuit
  3. Steering column assembly
C1554/23
Power source relay circuit malfunction

WIRING DIAGRAM


C193922E01


INSPECTION PROCEDURE

NOTICE:
  1. When the steering column assembly is replaced, perform the assist map writing (Click here).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK HARNESS AND CONNECTOR (STEERING COLUMN ASSEMBLY - BATTERY AND BODY GROUND)
C193923E01

  1. Disconnect the connector from the steering column assembly (power steering ECU).

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A15-1 (PIG) - Body ground
    		Always
    		11 to 14 V

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A15-2 (PGND) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to Steering Column Assembly (Power Steering ECU))



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE STEERING COLUMN ASSEMBLY (Click here)