ECM code P0633 - Ion Saturn Cars & Trucks

code p 0690 refers to ECM power relay control--sense circuit high====causes wiring short to positive--ECM relay---ECM The ECM relay will be in the collection of relays next to the battery

DTC P0633 : Theft Deterrent Key Not Programmed

When learning the pre-release password, as well as the challenge and response sequence, the engine control module (ECM) is placed in learn mode. DTC P0633 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the password and challenge/response are learned, learn mode will be exited when the engine is successfully started. At this point, the DTC will be cleared. If the ECM does not exit learn mode, P0633 will remain current and indicate a fault.
The "key" referenced in the DTC descriptor does not refer to the vehicle key. In this case, "key" is referring to the challenge response.
DTC P0633 requires a successful engine start to exit the learn procedure and clear the DTC. If an unrelated malfunction exists that causes engine starting to be disabled or otherwise unavailable, learn mode will not exit and DTC P0633 will remain current. In this situation, the cause of the inoperative engine starting must be corrected before diagnosing DTC P0633.
DTC P1629: Theft Deterrent Fuel Enable Signal Not Received
The theft deterrent module (TDM) sends the pre-release password to the engine control module (ECM) via the serial data circuit. The ECM then sends a challenge to the TDM. Both the ECM and TDM perform a calculation on this challenge. If the calculated response from the TDM equals the calculation performed by the ECM, the ECM will allow vehicle starting.
DTC P1629 is an indicator that the challenge response was not received within the required 2 second window. This does not necessarily indicate a fault is present with the TDM or ECM. Factors such as a long engine crank, a delay in the serial data communication, or B-codes set in the TDM will cause DTC P1629 to set. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
Who checked the codes , you -dealer ? You need to have BCM checked for codes B - codes ! you need a up scale diagnostic scan tool for that , dealer Tech -2 !
DTC B3935 57 : Transponder Authentication Error
DTC B3976 46 : Unconfigured Transponder/Vehicle Configuration Not Programmed
DTC B3060 : Unprogrammed Transponder Identification Code Received
DTC B3055: No Transponder Modulation or No Transponder
DTC B3031: Security System Controller In Learn Mode

Check the fuse for the ecm before replacing it. If you have a ford eec diagnostic try to get the codes. If you don't have a eec code reader there is a way to get the codes out by counting dashboard blinks. If you can get the ecm to output the codes the ecm is not bad.

Are you currently using the original PCM that came with the car or has it ever been changed?

seems like the ecm is working so you need to make sure that the transponder key gets reprogrammed to the anti theft module or bcm link your key may be at fault

hilux 2KD FTV , P1601 MEANS:

Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled Description ECM Overtemperature
Cause Engine running, then the PCM detected an internal temperature of over 221F or an internal temperature of -58F or over 284F.
SO, it is a PCM error, tep is too high normally, or you can ask the 24 hrs live technical support vas5054a, they will like to help you, good luck

p0633 is a code for the key not being programmed to the truck. I would try a different key. Do you have a remote start by chance?

ecm goes bad it will go in limp mode, vechicle will run poorly check engine light will stay on vechicle wont start.you need to use a code scanner check for ecm fault code, if check engine light not turning on when you start vechicle could have blowed ecm fuse or wiring problem, could have loose connection at ecm electrical connector or ecm getting poor ground but first check for a defective ecm using a code scanner.

OK, if the vehicle won't start and the service immobilizer light is on then I would definitely take it to the dealer in order to have the key programmed to the computer, again.

Did the battery go dead lately? Is there a code associated with it not starting, as in the immobilizer function lamp?

or the key is not programmed to the ecm?

P0633 Immobilizer Key Not Programmed ECM/PCM
This is just a possibility to look into.