DTC Troubleshooting: U0155 (107-3)
  1. Check for continuity between clutch actuator subharness 10P connector terminal No. 7 (No. 6) * and body ground.
    *: CANL
Is there continuity?
YES -
Remove the clutch actuator assembly, and check for change actuator subharness. If the wire harness is OK, substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM. ■
NO -
Repair an open in the wire between the clutch actuator subharness 10P connector and the gauge control module (tach).■
  1. Turn the ignition switch OFF.
  1. Wait for 30 seconds.
  1. Disconnect the gauge control module (tach) 36P connector.
  1. Disconnect the clutch actuator subharness 10P connector from the engine compartment wire harness.