DTC Troubleshooting: P0970
DTC P0970: Pressure Control Solenoid "C" Control 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
P0970 Pressure Control Solenoid "C" Control 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
P0970 Pressure Control Solenoid "C" Control Circuit Low
      

Is DTC P0970 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 clutch 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 (CPCLS line, others):

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

Does the CVT clutch pressure control solenoid valve work properly?

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

Open wire check (CPCLS 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 B (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 B (51P): disconnected
Test point 1
Solenoid wire harness 8P connector (engine wire harness side) No. 7
Test point 2
PCM connector B (51P) No. 14


Is there continuity?

     
YES
     
     
     
The CPCLS wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0970 goes away and the PCM was updated, troubleshooting is complete. If DTC P0970 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the CPCLS wire between the solenoid wire harness and the PCM.?
4.
CVT clutch pressure control solenoid valve check:

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

?2.
Disconnect the following connector.
CVT clutch 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 assembly side): disconnected
 
CVT clutch pressure control solenoid valve 2P connector: disconnected
Test point 1
CVT clutch pressure control solenoid valve 2P connector No. 1
Test point 2
CVT clutch pressure control solenoid valve 2P connector No. 2


Is there 4.6?6.3 ??

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