The PCM and the SMARTRA communicate by dedicated line. During this communication of PCM and SMARTRA the K line of PCM cannot be used for communication. The PCM controls the communication either to SMARTRA or to other devices(e.g. scanner) on K line by switching of a multiplexer and specific communication procedures. The multiplexer is a part of PCM H/W.
This DTC is defined as that PCM, indicator or scantool have some problem.
Item | Detecting Condition | Possible cause |
Enable Condition | ● IG ON | ● Scantool Error ● Virgin Transponder ● Faulty SMARTRA ● Faulty PCM ● Faulty TP ● Open or Short in SMATRA |
Detecting Criteria | EEPROM | ● Inconsistent data of EEPROM ● Invalid write operation to EEPROM |
Immobilizer indicator or PCM Faults | ● Not plausible VSS data stored at PCM, Virgin key at learnt PCM ● No valid data from SMARTRA after 3 attempts by PCM ● Invalid tester message or unexpected requests by tester(e.g. exceeding the maximum limit of twice IGN ON or teaching trials) |
PCM :
Virgin(This is status at the end of PCM production line before delivery to customer)
Neutral (This is a status that is erased all data regarding immobilizer by special command from scanner)
Not Check (The status is stored in permanent memory (EEPROM or Flash etc.).
In case of not plausible data from this circuit the PCM cannot check the status.
Locked by timer (After a certain number of incorrect user Password(4) or PIN Code(6) the EMS is locked for one hour and no inputs are accepted during this time)
KEY :
Virgin (It means the key in the key cylinder has not matched with PCM yet)
Invalid (mismatched)
- Key with NO Transponder
- More than 1(One) Transponder in the magnetic field.
- No Transponder in the magnetic field.
- TP data blocked
- TP data does not exist
- TP data changed
- TP Teaching error
- Multiple TP data input
Current Data from Immobilizer will show the numbers of Key learnt, PCM status, and Key status as Fig 1. Thanks to this current data, the symptom of unable starting is probably assumed what problem it is.
Fig. 2 shows possibility of Engine start, Teaching or changing of user password according to PCM status.
