P0966-PRESSURE CONTROL SOLENOID B CONTROL CIRCUIT LOW





For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The Transmission Control Module (TCM) regulates the secondary pressure by pulsing the secondary pressure solenoid. The TCM monitors the secondary pressure solenoid voltage and current draw during operation.


  • When Monitored:

    Ignition on with a system voltage between 9.0 and 16.0 volts.

  • Set Condition:

    If the monitored secondary pressure solenoid voltage is less than 70% of the target secondary pressure solenoid voltage for the period of 1.0 second.


Possible Causes
  
(T19) SECONDARY PRESSURE SOLENOID CONTROL CIRCUIT SHORT TO GROUND
  
SECONDARY PRESSURE SOLENOID
  
TRANSMISSION CONTROL MODULE
  

Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)



Diagnostic Test

1.CHECK TO SEE IF THE DTC IS ACTIVE



Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?

Yes
  • Go To 2


No
  • Go To 4

2.CHECK THE (T19) SECONDARY PRESSURE SOLENOID CONTROL CIRCUIT FOR A SHORT TO GROUND








Is the resistance below 5.0 ohms?

Yes


No
  • Go To 3

3.CHECK THE (T19) SECONDARY PRESSURE SOLENOID CONTROL CIRCUIT








NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.



Does the test light illuminate brightly?

Yes


No
  • Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM per the Service Information.
  • Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

4.INTERMITTENT WIRING AND CONNECTORS





Were there any problems found?

Yes


No
  • Test Complete.