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

B004UG1E09
*a from IG1-Relay
*b from Auxiliary 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 (AUXILIARY BATTERY - RACK AND PINION POWER STEERING GEAR ASSEMBLY)


    1. Disconnect the B1 rack and pinion power steering gear assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B1-4 (IG) - Body ground Power 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 for 2WD: Click here
    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY for AWD: Click here

    B

    USE SIMULATION METHOD TO CHECK Click here