i-SHIFT System Symptom Troubleshooting - i-SHIFT indicator stays on, but no DTCs are stored
i-SHIFT indicator stay on, but no DTCs are stored
  1. Turn the ignition switch to ON (II).
  1. Do the gauge self-diagnostic function.
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 (tach), and recheck. If the i-SHIFT indicator circuit is OK, replace the original gauge control module (tach). ■
  1. Connect the HDS to the DLC.
  1. Make sure the HDS communicates with the vehicle and the TCM. If it does not, troubleshoot the DLC circuit; R18A2 engine model, L13Z1 engine model.
  1. Check for DTCs with the HDS.
Is DTC U0155 indicated?
YES -
Go to the troubleshooting DTC U0155. ■
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; R18A2 engine model, L13Z1 engine model. ■