DTC Troubleshooting: P0904 (162-2)
DTC P0904:
 Select Actuator Motor Rotating Pulse Sensor Signal Circuit Malfunction
  1. Turn the ignition switch to ON (II).
  1. Clear the DTCs with the HDS.
  1. Start the engine.
  1. Change the shift lever in D, N, D, and N.
  1. Check for DTCs with the HDS.
Is DTC P0904 indicated?
YES -
Go to Step 6 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the select actuator motor 6P connector.
  1. Turn the ignition switch to ON (II).
  1. Check for DTCs with the HDS.
Is DTC P0904 indicated?
YES -
Go to Step 10 .
NO -
Replace the transmission shift change actuator; R18A2 engine model, L13Z1 engine model. ■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect change actuator subharness B 8P connector (R18A2 engine model) or change actuator subharness B 10P connector (L13Z1 engine model).
  1. Check for continuity between the select actuator motor 6P connector terminal No. 5 and body ground.
Is there continuity?
YES -
Repair a short to ground in the wire of change actuator subharness B.■
NO -
Go to Step 13 .
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between select actuator motor 6P connector terminal No. 5 and body ground.
Is there battery voltage?
YES -
Repair a short to power in the wire of change actuator subharness B.■
NO -
Go to Step 15 .
  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.■