DTC Troubleshooting: P0976, P0977(CVT (TCM))

DTC P0976  : Shift Solenoid Valve B Circuit Low

DTC P0977  : Shift Solenoid Valve B 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. Test-drive under following conditions:

   DTC	Test-drive condition
   P0976	Start the engine, and warm it up to normal operating temperature (the radiator fan comes on twice). Test-drive the vehicle in D position/mode on a flat road at speeds about 37 mph (60 km/h) for at least 10 seconds.
   P0977	Shift the transmission to P position/mode. Start the engine, and wait for at least 10 seconds.

   -4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0976 Shift Solenoid Valve B Circuit Low
   P0977 Shift Solenoid Valve B Circuit High

   Is DTC P0976 or P0977 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 shift solenoid valve B 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 SOL B line, open in SOL B/SHB+ line)

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

   -2. Disconnect the following connector.

   TCM 50P connector

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	TCM 50P connector: disconnected
   Test point 1	TCM 50P connector No. 7
   Test point 2	Body ground

   Is there 10.6-13.5 Ω?

   10.6-13.5 Ω

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

   Less than 10.6 Ω

   Go to step 3.

   More than 13.5 Ω

   Go to step 4.

3. Shorted wire check (SOL B line)

   -1. Disconnect the following connector.

   Shift solenoid valve B 2P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Shift solenoid valve B 2P connector: disconnected
   	TCM 50P connector: disconnected
   Test point 1	TCM 50P connector No. 7
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to ground in the SOL B wire between shift solenoid valve B and the TCM.

   NO 

   The SOL B wire is OK. Faulty shift solenoid valve B. Replace the valve body assembly .

4. Open wire check (SOL B/SHB+ line)

   -1. Disconnect the following connector.

   Shift solenoid valve B 2P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Shift solenoid valve B 2P connector: disconnected
   	TCM 50P connector: disconnected
   Test point 1	Shift solenoid valve B 2P connector (female terminals) No. 1 :
   Test point 2	TCM 50P connector No. 7

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

   Is there continuity?

   YES 

   The SOL B/SHB+ wire is OK. Faulty shift solenoid valve B. Replace the valve body assembly .

   NO 

   Repair an open in the SOL B/SHB+ wire between shift solenoid valve B and the TCM.