P1694

DTC P1694 EMS MESSAGE ERROR

Component Location:

GENERAL DESCRIPTION
The vehicle immobilizer system consists of the EMS, the SMARTRA and ignition keys with built-in transponder. The EMS carries out the check of ignition key by special encryption algorithm with SMARTRA and Transponder. When IGN On, the EMS executes the key Authentication after SMARTRA authentication. The Engine can be started in case of the success in SMARTRA and key authentication.

The EMS and the SMARTRA communicate by dedicated line. During this communication of EMS and SMARTRA the K line of EMS cannot be used for communication. The EMS controls the communication either to SMARTRA or to other devices (e.g. service tester) on K line by switching of a multiplexer and specific communication procedures. The multiplexer is a part of EMS H/W.

DTC DESCRIPTION
The ECM sets DTC P1694 if Request from EMS is invalid.

DTC Detecting Condition:

COMPONENT INSPECTION
1. Check status
1. IGN "ON" & Engine "OFF"
2. Monitor the "KEY STATUS", "SMARTRA STATUS" and "ECU STATUS" Parameter on the Scantool.

Specification : "LEARNT"






3. Are "KEY STATUS", "SMARTRA 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.