DTC Troubleshooting: P0966
DTC P0966: CVT Driven Pulley Pressure Control Valve Circuit Low
NOTE:
Before you troubleshoot, review the General Troubleshooting Information.
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0966 CVT Driven Pulley Pressure Control Valve Circuit Low
      

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine, and wait for at least 1 second.

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0966 CVT Driven Pulley Pressure Control Valve Circuit Low
      

Is DTC P0966 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between the CVT driven pulley pressure control solenoid valve and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Determine possible failure area (DNLS line, others):

Determine possible failure area (DNLS line, others)
?1.
Do the CVT driven pulley pressure control solenoid valve test.

Does the CVT driven pulley pressure control solenoid valve work properly?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 4.
3.
Open wire check (DNLS line):

Open wire check (DNLS line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector C (51P)

?4.
Disconnect the following connector.
Solenoid wire harness 8P connector (engine wire harness side)


?5.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Solenoid wire harness 8P connector (engine wire harness side): disconnected
PCM connector C (51P): disconnected
Test point 1
Solenoid wire harness 8P connector (engine wire harness side) No. 6
Test point 2
PCM connector C (51P) No. 10


Is there continuity?

     
YES
     
     
     
The DNLS wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0966 goes away and the PCM was updated, troubleshooting is complete. If DTC P0966 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the DNLS wire between the solenoid wire harness and the PCM.?
4.
CVT driven pulley pressure control solenoid valve check:

CVT driven pulley pressure control solenoid valve check
?1.
Remove the valve body assembly.

?2.
Disconnect the following connector.
CVT driven pulley pressure control solenoid valve 2P connector

?3.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Solenoid wire harness 8P connector (valve body side): disconnected
 
CVT driven pulley pressure control solenoid valve 2P connector: disconnected
Test point 1
CVT driven pulley pressure control solenoid valve 2P connector No. 1
Test point 2
CVT driven pulley pressure control solenoid valve 2P connector No. 2


Is there 4.6?6.3 ??

     
YES
     
     
     
The CVT driven pulley pressure control solenoid valve is OK. Replace the solenoid wire harness.?
     
NO
     
     
     
Faulty CVT driven pulley pressure control solenoid valve. Replace the valve body assembly.?