POWER STEERING SYSTEM, Diagnostic DTC:C1552

DESCRIPTION

When a problem occurs in the power steering system, the power source relay circuit is shut off to stop the power assist.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (PIG POWER SUPPLY)

   
   

   1. Turn the ignition switch off.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the ignition switch on (IG).

   4. Turn the intelligent tester on.

   5. Enter the following menus: Chassis / EMPS / Data List.

   6. Select the item "PIG Power Supply" in the Data List and read the value displayed on the intelligent tester.

      Table 1. EMPS:

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      PIG Power Supply	PIG power supply: Min.: 0 V Max.: 20.1531 V	11 to 14 V	Power steering is in operation

      OK
      The normal condition value is displayed on the intelligent tester.

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND)

   
   
   1. 

      Disconnect the connector from the power steering ECU.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition D4-1 (PIG) - Body ground Ignition switch on (IG) 11 to 14 V

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

      Standard resistance
      Tester Connection Condition Specified Condition D4-2 (PGND) - Body ground Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
3. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   REPLACE POWER STEERING ECUClick here

5. Click here

   CHECK INTERMITTENT PROBLEMS