POWER STEERING SYSTEM, Diagnostic DTC:C1551

DTC Code DTC Name
C1551 IG Power Supply Voltage

DESCRIPTION

When a problem occurs in the power source circuit, the fail-safe function works to stop the power assist.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1551 IG Power Supply Voltage When the PIG power supply voltage is normal and the IG power supply voltage is 18.5 V or higher

  • Harness or connector

  • Rack and pinion power steering gear assembly

 EPS warning light: Comes on The ECU judges the system has returned to normal -

WIRING DIAGRAM

B000UAUE03
*a from IG1 Relay
*b from Battery
*c Power Steering ECU (Rack and Pinion Power Steering Gear Assembly)

CAUTION / NOTICE / HINT

Note


  • If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

    Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (BATTERY - RACK AND PINION POWER STEERING GEAR ASSEMBLY)


    1. Disconnect the C1 rack and pinion power steering gear assembly connector.

      B000YKFC07
      *a

      Front view of wire harness connector

      (to Rack and Pinion Power Steering Gear Assembly)

      		 - -

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C1-4 (IG) - Body ground Engine switch on (IG) Below 18.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Chassis > EMPS > Clear DTCs

    2. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTC is output. A
      DTC is not output. B

    A

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here