Code 84

A/T Diagnosis Communication Line Test:

A/T DIAGNOSIS COMMUNICATION LINE (DTC: P1605)
1) Turn ignition switch "ON".
2) Wait for at least 40 seconds or start engine and wait for at least 40 seconds.
3) Turn ignition switch "OFF", wait for at least 3 seconds and then turn "ON".

Switching Test Modes:

4) Perform diagnostic test mode II (self-diagnostic results) with ECCS Control Module.