DTC    C1551/25    IG Power Supply Voltage Malfunction

for Preparation Click here


DESCRIPTION

The steering column assembly (power steering ECU) distinguishes the ignition switch status as ON or off through the IG power source circuit.

DTC No.
DTC Detection Condition
Trouble Area
C1551/25
Open or short in IG power source circuit with ignition switch ON
  1. ECU-IG No. 1 fuse
  2. IG power source circuit
  3. Steering column assembly

WIRING DIAGRAM


C212085E01


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)


    C193921E01

  1. Disconnect the connectors 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
    		Switch Condition
    		Specified Condition
    D51-5 (IG) - Body ground
    		Ignition switch ON
    		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))
    Result 
    Result
    		Proceed to
    OK
    		A
    NG (w/o Stop and start system)
    		B
    NG (w/ Stop and start system)
    		C



B
REPAIR OR REPLACE HARNESS OR CONNECTOR

C
GO TO STOP AND START SYSTEM (Click here)
A

REPLACE STEERING COLUMN ASSEMBLY (Click here)