SYMPTOM
P1685-WRONG OR INVALID KEY MESSAGE RECEIVED FROM SKIM

WHEN MONITORED
With the ignition ON.

SET CONDITION
The PCM does not receive a Valid Key message from the SKIM.

POSSIBLE CAUSES
Incorrect VIN in PCM
Invalid skim key not present
No communication with SKIM
No VIN programmed in the PCM
PCM
SKIM trouble codes set

this is the flow chart. no easy fix here as all these need to be checked and verified. code numbers never identify bad parts, just failed systems

Roy