( TF09E1PK77100090977FAAT00 )
DTC Troubleshooting: P0977 (8)
DTC P0977:
 Shift Solenoid Valve B (Open)
NOTE:
  1. Clear the DTC with the HDS.
  1. Start the engine, and test-drive the vehicle:
    • Seven-position transmission: Drive the vehicle in D3, and let the transmission shift through all three gears. Drive the vehicle in 3rd gear for at least 1 second, then slow down to a stop.
    • Five-position transmission: Drive the vehicle in 1st thru 3rd gears in the sequential shift mode in S. Drive the vehicle in 3rd gear for at least 1 second, then slow down to a stop.
  1. Check that DTC P0977 recurs.
Is DTC P0977 indicated?
YES -
Go to Step 7 .
NO -
Go to Step 4 .
  1. Select Shift Solenoid B in the Miscellaneous Test Menu, and test shift solenoid valve B with the HDS.
Is a clicking sound heard?
YES -
Go to Step 5 .
NO -
Go to Step 7 .
  1. Start the engine, and test-drive the vehicle:
    • Seven-position transmission: Drive the vehicle in 1st gear in D3 for at least 1 second, then press the accelerator pedal so that the transmission upshifts into 3rd gear, and drive in 3rd gear for at least 1 second. Slow down and stop the wheels.
    • Five-position transmission: Drive the vehicle in 1st gear in the sequential shift mode in S for at least 1 second, then upshift to 3rd gear by pulling the paddle shifter + (upshift switch), and drive in 3rd gear for at least 1 second. Slow down and stop the wheels.
  1. Monitor the OBD status for P0977 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate FAILED?
YES -
Go to Step 7 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at shift solenoid valve B and the PCM. If the HDS indicates NOT COMPLETED, return to Step 4 and recheck.
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect PCM connectors B (49P) and C (49P).
  1. Measure the resistance between PCM connector terminals B27 and C44 or C48.
Is there 12−25 Ω?
YES -
Go to Step 15 .
NO -
Go to Step 11 .
  1. Disconnect the shift solenoid harness connector.
  1. Check for continuity between PCM connector terminal B27 and shift solenoid harness connector terminal No. 2.
Is there continuity?
YES -
Go to Step 13 .
NO -
Repair open in the wire between PCM connector terminal B27 and the shift solenoid harness connector, then go to Step 25 .
  1. Check for continuity between shift solenoid harness connector terminal No. 2 and the shift solenoid valve B connector terminal.
Is there continuity?
YES -
NO -
  1. Disconnect PCM connector A (49P).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between PCM connector terminals A1 and C44 or C48.
Is there battery voltage?
YES -
Go to Step 20 .
NO -
Go to Step 18 .
  1. Turn the ignition switch to LOCK (0).
  1. Check for continuity between PCM connector terminals C44 and body ground, and between C48 and body ground.
Is there continuity?
YES -
Check for a blown No. 7 (10 A) fuse in the under-hood fuse/relay box. If the fuse is OK, repair open or short in the wire between PCM connector terminal A1 and the under-hood fuse/relay box, then go to Step 25 .
NO -
Repair open in the wires between PCM connector terminals C44, C48 and ground (G101), or repair poor ground (G101), then go to Step 25 .
  1. Connect PCM connectors.
  1. Test-drive the vehicle:
    • Seven-position transmission: Drive the vehicle in 1st gear in D3 for at least 1 second, then press the accelerator pedal so that the transmission upshifts into 3rd gear, and drive in 3rd gear for at least 1 second. Slow down and stop the wheels.
    • Five-position transmission: Drive the vehicle in 1st gear in the sequential shift mode in S for at least 1 second, then upshift to 3rd gear by pulling the paddle shifter + (upshift switch), and drive in 3rd gear for at least 1 second. Slow down and stop the wheels.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0977 indicated?
YES -
If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to Step 1 .
NO -
Go to Step 24 .
  1. Monitor the OBD status for P0977 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other DTCs were indicated on Step 23 , go to the indicated DTC's troubleshooting.■
NO -
Check for poor connections and loose terminals at shift solenoid valve B and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to Step 1 . If the HDS indicates NOT COMPLETED, return to Step 22 and recheck.
  1. Reconnect all connectors.
  1. Clear the DTC with the HDS.
  1. Test-drive the vehicle:
    • Seven-position transmission: Drive the vehicle in 1st gear in D3 for at least 1 second, then press the accelerator pedal so that the transmission upshifts into 3rd gear, and drive in 3rd gear for at least 1 second. Slow down and stop the wheels.
    • Five-position transmission: Drive the vehicle in 1st gear in the sequential shift mode in S for at least 1 second, then upshift to 3rd gear by pulling the paddle shifter + (upshift switch), and drive in 3rd gear for at least 1 second. Slow down and stop the wheels.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0977 indicated?
YES -
Check for poor connections and loose terminals at shift solenoid valve B and the PCM, then go to Step 1 .
NO -
Go to Step 29 .
  1. Monitor the OBD status for P0977 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other DTCs were indicated on Step 28 , go to the indicated DTC's troubleshooting.■
NO -
Check for poor connections and loose terminals at shift solenoid valve B and the PCM, then go to Step 1 . If the HDS indicates NOT COMPLETED, return to Step 27 and recheck.