ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C1938

DESCRIPTION

When a malfunction is detected in the motor short relay power supply IC of the front active stabilizer control ECU, DTC C1938 is output.

PROCEDURE

1. INTERCHANGE FRONT AND REAR ACTIVE STABILIZER CONTROL ECU ASSEMBLY

   
   

   1. Turn the power switch OFF.

   2. Interchange the front active stabilizer control ECU with the rear active stabilizer control ECU, and install them securely.

      Tech Tips

      
      

      • Interchange the front and rear active stabilizer control ECUs and check for DTCs. After interchanging the ECUs, if a rear stabilizer DTC is displayed, it can be determined that the front active stabilizer control ECU is malfunctioning. If no DTC is output, the front active stabilizer control actuator is malfunctioning.

      • For the ECU removal and installation procedures, refer to the front ECU procedures (see page ) or the rear ECU procedures Click here.

   
   

   NEXT

2. CLEAR DTC

   
   

   1. Turn the power switch OFF.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the power switch ON (IG) and the tester ON.

   4. Clear the DTC Click here.

   
   

   NEXT

3. CHECK OPERATION OF FRONT ACTIVE STABILIZER CONTROL ECU ASSEMBLY

   
   

   1. Turn the power switch OFF.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the power switch ON (READY) and wait 30 seconds or more. Then check for rear stabilizer DTCs Click here.

      OK
      DTC C1912 is not output

   
   

   OK

   REPLACE FRONT ACTIVE STABILIZER CONTROL ACTUATOR ASSEMBLY Click here

   NG

   REPLACE FRONT ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here