ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C1959

DESCRIPTION

When an abnormal IG power supply voltage of the front active stabilizer control ECU is detected, DTC C1959 is output.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION

   
   

   1. Turn the power switch OFF.

   2. Check that the connectors of the front active stabilizer control ECU are not loose or disconnected.

      OK
      Connectors are not loose or disconnected

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. 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.

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

   
   

   NEXT

3. 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

4. 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 DTC Click here.

      OK
      DTC C1952 is not output

   
   

   NG

   REPLACE FRONT ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

   OK

   USE SIMULATION METHOD TO CHECK Click here