DTC Troubleshooting: P0904 (162-2)
  1. Check for continuity between the select actuator motor 6P connector terminal No. 5 and change actuator subharness B 8P connector terminal No. 6 (R18A2 engine model) or change actuator subharness B 10P connector terminal No. 5 (L13Z1 engine model).
Is there continuity?
YES -
Remove the clutch actuator assembly; R18A2 engine model, L13Z1 engine model, and check for change actuator subharness A. If the wire harness is OK, 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. ■
NO -
Repair an open in the wire of change actuator subharness B.■