DTC Troubleshooting: P0970, P0971(CVT (TCM))

DTC P0970  : Pressure Control Solenoid C Control Circuit Low

DTC P0971  : Pressure Control Solenoid C Control Circuit High

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(CVT)

1. 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
   P0971 Pressure Control Solenoid C Control Circuit High

   Is DTC P0970 or P0971 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 TCM. 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 (TCM, short in CPCLS line, open in CPCLS/CPC+ line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   NOTE:  This step must be done to protect the TCM from damage.

   -3. Disconnect the following connector.

   TCM 50P connector

   -4. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	TCM 50P connector: disconnected
   Test point 1	TCM 50P connector No. 13
   Test point 2	Body ground

   Is there 4.7-5.9 Ω?

   4.7-5.9 Ω

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original TCM .

   Less than 4.7 Ω

   Go to step 3.

   More than 5.9 Ω

   Go to step 4.

3. Shorted wire check (CPCLS line)

   -1. Disconnect the following connector.

   CVT clutch pressure control solenoid valve 2P connector

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CVT clutch pressure control solenoid valve 2P connector: disconnected
   	TCM 50P connector: disconnected

   Test point 1	TCM 50P connector No. 13
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to ground in the CPCLS wire between the CVT clutch pressure control solenoid valve and the TCM.

   NO 

   The CPCLS wire is OK. Faulty CVT clutch pressure control solenoid valve. Replace the valve body assembly .

4. Open wire check (CPCLS/CPC+ line)

   -1. Disconnect the following connector.

   CVT clutch pressure control solenoid valve 2P connector

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CVT clutch pressure control solenoid valve 2P connector: disconnected
   	TCM 50P connector: disconnected
   Test point 1	CVT clutch pressure control solenoid valve 2P connector (female terminals) No. 2 :
   Test point 2	TCM 50P connector No. 13

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The CPCLS/CPC+ wire is OK. Go to step 5.

   NO 

   Repair an open in the CPCLS/CPC+ wire between the CVT clutch pressure control solenoid valve and the TCM.

5. Open wire check (CPC- line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CVT clutch pressure control solenoid valve 2P connector: disconnected
   	TCM 50P connector: disconnected
   Test point 1	CVT clutch pressure control solenoid valve 2P connector (female terminals) No. 1 :
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The CPC- wire is OK. Faulty CVT clutch pressure control solenoid valve. Replace the valve body assembly .

   NO 

   Repair an open in the CPC- wire between the CVT clutch pressure control solenoid valve and ground (G162), or repair poor ground (G162).