DTC Troubleshooting: P0977
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 Description
Confirmed DTC
Pending DTC
Freeze Frame
P0977 Shift Solenoid Valve B Circuit High
      

1.
Problem verification:

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

?2.
Clear the DTC with the HDS.


?3.
Start the engine in P, 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
P0977 Shift Solenoid Valve B Circuit High
      

Is DTC 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 or loose terminals between the shift solenoid valve B 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.
Shift solenoid valve B check:

Shift solenoid valve B check
?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 PCM from damage.


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

?4.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector C (51P): disconnected
Test point 1
PCM connector C (51P) No. 19
Test point 2
Body ground

Is there 10.6?13.5 ??

     
YES
     
     
     
The shift solenoid valve B is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original PCM.?
     
NO
     
     
     
Go to step 3.
3.
Open wire check (SOL B line):

Open wire check (SOL B line)
?1.
Disconnect the following connector.
Solenoid wire harness A 8P connector

?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Solenoid wire harness A 8P connector: disconnected
 
PCM connector C (51P): disconnected
Test point 1
Solenoid wire harness A 8P connector (female terminals) No. 5 :
Test point 2
PCM connector C (51P) No. 19


Is there continuity?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Repair an open in the SOL B wire between the solenoid wire harness A 8P connector and the PCM.?
4.
Shift solenoid valve B internal resistance check:

Shift solenoid valve B internal resistance check
?1.
Disconnect the following connector.
Shift solenoid valve B 2P connector

?2.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Solenoid wire harness A 8P connector: disconnected
 
Shift solenoid valve B 2P connector: disconnected
Test point 1
Shift solenoid valve B 2P connector (male terminals) No. 1 :
Test point 2
Body ground


Is there 10.6?13.5 ??

     
YES
     
     
     
Shift solenoid valve B is OK. Repair an open in the SHB+ wire between the solenoid wire harness A 8P connector and shift solenoid valve B.?
     
NO
     
     
     
Faulty shift solenoid valve B. Replace the valve body assembly.?