P1676
DTC P1676 SMARTRA MESSAGE ERRORComponent Location:
GENERAL DESCRIPTION
1. The sequences of the PIN code storage are as follows.
1. Input the PIN code into the scanner when key teaching process.
The scanner transmits the Encrypted Code to the ECM after converting the PIN code into Encrypted Code.
2. When the ECM gets the first key learning command, it transmits the SMARTRA3 learnt command and Encrypted Code to the SMARTRA3
3. If the SMARTRA3 statue is virgin/neutral, the SMARTRA3 stores Encrypted Code in EEPROM and transmits the success message of the Encrypted Code storage.
(If the SMARTRA3 is learnt, the SMARTRA3 compares Encrypted Code transmitted by the ECM with Encrypted Code stored in EEPROM and transmits the (in)correct Encrypted Code message to ECM)
4. If the SMARTRA3 is learnt normally or the Encrypted Code of the registered SMARTRA3 is same as the ECM, the ECM begins operation the Transponder Learning.
5. If the learning of the first transponder, the ECM stores the Encrypted Code in its EEPROM and converts state into learnt state.
2. The SMARTRA3 learning
1. starts with EMS request of PIN from scanner through the key teaching procedure.
2. is possible in case that the status of SMARTRA is "virgin" or "neutral".
3. In case that the SMARTRA3 is "learnt", the SMARTRA3 will transmits the information if PIN inputted from scanner is same as the PIN in SMARTRA3.
4. is possible regardless of key status.
3. The sequence of the SMARTRA3 confirms are as follows.
1. After communication with the SMARTRA3, the ECM transmits the random number with requirement of the TP ID information.
2. The SMARTRA3 encryptes the random number and transmits the result (Encrypted Random Number) to the ECM with TP ID information.
3. The ECM compares the result transmitted from the SMARTRA3 with the result calculated by ECM. And If result are coincided with each other; the ECS concludes the valid confirmation of the SMARTRA3.
DTC DESCRIPTION
The ECM sets DTC P1676 if there's any fault in message from SMARTRA to ECU.
DTC Detecting Condition:
Diagnostic Circuit Diagram:
MONITOR SCANTOOL DATA
1. Check transponder and ECU status
1. IGN "ON" & Engine "OFF" with key intended to register
2. Monitor the "ECU, KEY, Smartra STATUS" Parameter on the Scantool.
Specification : "LEARNT"
3. Has the "SMARTRA" status been learnt?
YES - Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, damage on the ECM or SMARTRA.
And has not erased this DTC which is not erased previous repair. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO - Go to "Check SMARTRA" procedure.
2. Check SMARTRA
1. IGN "ON" & Engine "OFF"
2. Neutralize SMARTRA with scantool.
3. Neutralize ECM and Register transponder key by scantool.
NOTE: Pin code is required to Neutralize SMARTRA & ECM and to Register transponder key
4. Are Neutralizing and Registering Key completed normally?
YES - Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, damage on the ECM or SMARTRA. Or It has not been erased this DTC in previous repair. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO - Substitute with a known-good SMARTRA and perform the Key teaching.
If the problem is corrected, replace SMARTRA and then go to "Verification of Vehicle Repair" procedure.
NOTE: If the SMARTRA3 is only replaced using an existing key and ECM, after replacing the "virgin" or "neutral" SMARTRA3, reteaching is possible by key Learning mode of scanner. In this case, all existing key must be retaught. If SMARTRA3 is replaced to another one (used at other vehicle), it can only recycle its neutralized first before replacing.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode and then clear DTC.
2. Operate the vehicle and monitor the DTC on the scantool.
3. Are any DTCs present?
YES - Go to the applicable troubleshooting procedure.
NO - System is performing to specification at this time.