DTC Troubleshooting: 121-xx, 122-xx, 123-xx, 124-xx

DTC 121-xx*:  VSA Solenoid Valve Malfunction
  
  
DTC 123-xx*:  VSA Solenoid Valve Malfunction
  
  

*: Subcode 

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Turn the ignition switch OFF, then turn it ON (II) again.

4.Check for DTCs with the HDS.

DTC Sectional Valve 
121 -01 Right-front and
left-rear 
master cut 
-02 regulator 
-11 
-21 master cut 
-22 
-23 
-24 regulator 
122 -01 suction 
-21 
-22 
-23 
123 -01 Left-front and
right-rear 
master cut 
-02 regulator 
-11 
-21 master cut 
-22 
-23 
-24 regulator 
124 -01 suction 
-21 
-22 
-23 

Is DTC 121-xx, 122-xx, 123-xx, or 124-xx indicated?


YES - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit and retest.n


NO - Intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 37P connector. Refer to intermittent failures troubleshooting.n