VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:C15A5/65

DESCRIPTION

If the steering control ECU detects a malfunction in the lock mechanism, it will turn the master warning light on, store DTC C15A5/65, and stop VGRS operation.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)

   
   

   1. Disconnect the E79 steering control ECU connector.

   2. Disconnect the E80 steering actuator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E79-3 (LV) - E80-7 (LV+) Always Below 1 Ω E79-12 (LG) - E80-16 (LG+) E79-3 (LV) - Body ground Always 10 kΩ or higher E79-12 (LG) - Body ground

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition E79-3 (LV) - Body ground Engine switch on (IG) Below 1 V E79-12 (LG) - Body ground

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK STEERING ACTUATOR (STEERING CONTROL ECU - STEERING ACTUATOR)

   
   

   1. Disconnect the E79 steering control ECU connector.

   2. 

      Reconnect the E80 steering actuator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E79-3 (LV) - E79-12 (LG) Always 10 to 100 Ω E79-3 (LV) - Body ground Always 10 kΩ or higher E79-12 (LG) - Body ground

      Table 1. Result

      Result	Proceed to
      NG	A
      OK (for LHD)	B
      OK (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
3. Click here

   REPLACE STEERING CONTROL ECUClick here

4. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

5. Click here

   REPLACE STEERING ACTUATOR ASSEMBLYClick here

6. Click here

   REPLACE STEERING CONTROL ECUClick here