4921-Switch Over Valve Control Circuit High: Testing

WARNING: This page is about a different car, the 2009 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR A DTC 4921-SWITCH OVER VALVE CONTROL CIRCUIT HIGH
NOTE: This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Freeze Frame information.
4. With the scan tool, erase DTCs.
5. Start the engine.
6. Depress and release the brake pedal.
7. With the scan tool, read and record DTCs.
  Does the scan tool display: 4921-SWITCH OVER VALVE CONTROL CIRCUIT HIGH?
  
  Yes
  - Go to step 2
  No
  - Refer to the INTERMITTENT CONDITION diagnostic procedure.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
RECHECK FOR A DTC 4921-SWITCH OVER VALVE CONTROL CIRCUIT HIGH
1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Freeze Frame information.
4. With the scan tool, erase DTCs.
5. Start the engine.
6. Depress firmly and release the brake pedal.
7. With the scan tool, read and record DTCs.
  Does the scan tool display: 4921-SWITCH OVER VALVE CONTROL CIRCUIT HIGH?
  
  Yes
  - Replace the ICU in accordance with the Service Information.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Test complete