( TF09E00K801000S21XXFAAT00 )
VSA DTC Troubleshooting: 121-xx, 122-xx, 123-xx, 124-xx
DTC 121-xx * :
 VSA Solenoid Valve Malfunction
DTC 122-xx * :
 VSA Solenoid Valve Malfunction
DTC 123-xx * :
 VSA Solenoid Valve Malfunction
DTC 124-xx * :
 VSA Solenoid Valve Malfunction
*:
Any two-character subcode (see table).

DTC
Sectional
Valve
121
-01
Right-front and left-rear
Regulator
-02
-11
-21
-24
122
-01
Suction
-21
-22
-23
123
-01
Left-front and right-rear
Regulator
-02
-11
-21
-24
124
-01
Suction
-21
-22
-23

  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  1. Check for DTCs with the HDS.
Is DTC 121-xx, 122-xx, 123-xx, or 124-xx indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  1. Check for DTCs with the HDS.
Is DTC 121-xx, 122-xx, 123-xx, or 124-xx indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit, then retest. If the VSA modulator-control unit was substituted, go to Step 1 .
NO -
If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.■