Skip to main content
i-SHIFT System Symptom Troubleshooting - i-SHIFT indicator stay on, but no DTCs are stored

i-SHIFT indicator stay on, but no DTCs are stored
  1. Turn the ignition switch to ON (II).
Does the i-SHIFT indicator flash?
YES -
Go to Step 3 .
NO -
Update the TCM if it does not have the latest software, or substitute a known-good gauge control module, and recheck. If the i-SHIFT indicator circuit is OK, replace the original gauge control module.
  1. Make sure the HDS communicates with the vehicle and the TCM. If it does not, troubleshoot the DLC circuit.
  1. Check for DTCs with the HDS.
Is DTC U0155 indicated?
YES -
NO -
Update the TCM if it does not have the latest software, or substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.