DTC Troubleshooting: P0973 (7-3)

DTC P0973:
 Short in Shift Solenoid Valve A Circuit
NOTE:
  1. Clear the DTC with the HDS.
  1. Start the engine, and shift to the D position.
  1. Check that DTC P0973 recurs.
Is DTC P0973 indicated?
YES -
Go to Step 7 .
NO -
Go to Step 4 .
  1. Choose Shift Solenoid A in Miscellaneous Test Menu, and test the shift solenoid valve A with the HDS.
  1. Start the engine, and shift to the D position.
  1. Monitor the OBD status for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a fail?
YES -
Go to Step 7 .
NO -
Intermittent failure, the system is OK at this time. Check the BLU/BLK wire for an intermittent short to ground between shift solenoid valve A and PCM. If the tester indicates NOT COMPLETE, return to Step 4 and recheck.■
  1. Turn the ignition switch OFF.
  1. Jump the SCS line with the HDS.
  1. Disconnect PCM connectors A (31P) and C (22P).
  1. Measure the resistance between PCM connector terminals C6 and A8 or A9.
Is there less than 12 Ω?
YES -
Go to Step 11 .
NO -
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .■
  1. Disconnect the shift solenoid harness connector at the transmission housing.

  1. Check for continuity between PCM connector terminals C6 and A8 or A9.
Is there continuity?
YES -
Repair short to ground in the wire between PCM connector terminal C6 and the shift solenoid harness connector, then go to Step 13 .
NO -
Check shift solenoid valve A, and check for a short in the shift solenoid harness in the transmission. Replace shift solenoid valve A and/or shift solenoid harness, then go to Step 13 .
  1. Clear the DTC with the HDS.
  1. Start the engine, and shift to the D position.
  1. Monitor the OBD status for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a pass?
YES -
The problem has been corrected.■
NO -
Return to Step 1 and recheck.■