POWER STEERING SYSTEM (for 2GR) EPS Warning Light Circuit

DESCRIPTION

If the power steering ECU assembly detects a malfunction, the P/S warning light comes on. At this time, the power steering ECU assembly stores a DTC in its memory.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION AND GROUND WIRE

   
   

   1. Check the connection condition of the ECU wire sub-assembly and power steering ECU assembly connectors.

      OK
      The ECU wire sub-assembly and power steering ECU assembly connectors are securely connected.

   2. Check that the ground wire is securely installed with the bolt Click here.

      OK
      The ground wire is securely installed with the bolt.

   
   

   NG

   CONNECT CONNECTOR OR INSTALL GROUND WIRE Click here

   OK

2. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

   
   

   1. Check for DTCs Click here.

      OK
      DTC is not output.

   
   

   NG

   GO TO CAN COMMUNICATION SYSTEM Click here

   OK

3. CHECK HARNESS AND CONNECTOR (BATTERY - ECU WIRE SUB-ASSEMBLY)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to ECU Wire Sub-assembly)

      Disconnect the Ij2 connector from the ECU wire sub-assembly.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition Ij2-5 (IG) - Body ground Engine switch on (IG) 9 to 16 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK ECU WIRE SUB-ASSEMBLY

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Power Steering ECU Assembly)

      Connect the Ij2 connector to the ECU wire sub-assembly.

   2. Disconnect the power steering ECU assembly j3 and j2 connectors.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition j3-1 (IG) - Body ground Engine switch on (IG) 9 to 16 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition j2-2 (PGND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE ECU WIRE SUB-ASSEMBLY Click here

   OK

5. PERFORM ACTIVE TEST USING TECHSTREAM

   
   

   1. Reconnect the power steering ECU assembly j3 and j2 connectors.

   2. Perform the Active Test of the combination meter assembly using the Techstream Click here.

   3. Check the combination meter assembly.

      OK
      The P/S warning light turns on or off in accordance with the Techstream operation.

   
   

   NG

   REPLACE COMBINATION METER ASSEMBLY Click here

   OK

   REPLACE POWER STEERING ECU ASSEMBLY Click here