P1694

DTC P1694 EMS MESSAGE ERROR

Component Location:

GENERAL DESCRIPTION
Immobilizer is device that prevents car from being thieved by reproduced key. Major components of immobilizer are ECM(Engine Control Module) and SMARTRA. Besides them, immobilizer has transponder and coil antenna in it. If driver inserts key into key hole, SMARTRA gets transponder signal by wireless communications via coil antenna and delivers it to ECM through K-line communication line. then ECM deciphers code in it. If inserted key has invalid transponder with incorrect code or doesn't have transponder in it, ECM judges that inserted key is reproduced key and prohibits engine starting.

DTC DESCRIPTION
The ECM sets DTC PI694 if Request from EMS is invalid.

DTC Detecting Condition:

Schematic Diagram:

COMPONENT INSPECTION
1. Check transponder and ECU status.
1. IGN "ON" & Engine "OFF"




2. Monitor the "KEY STATUS" and "ECU STATUS" Parameter on the Scantool.

Specification : 'LEARNT'

3. Are "KEY STATUS" and "ECU STATUS" Parameter within specifications?

YES - Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO - Go to "Check transponder" procedure.

2. Check ECM
1. IGN "ON" & Engine "OFF"
2. Neutralize ECM and Register transponder key by scantool.

NOTE: Pin code is required to Neutralize ECM and to Register transponder key

3. Are Neutralizing and Registering completed normally?

YES - Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO - Substitute with a known-good ECM and check for proper operation.
If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure.

NOTE: ECM substituted for old one must be in "Virgin" or "Neutral" status and Pin code is required to Neutralize ECM and to Register transponder key.

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.