P1694

DTC P1694 EMS MESSAGE ERROR

Component Location:

GENERAL DESCRIPTION
The ECM and the SMARTRA communicate by dedicated line. During this communication of ECM and SMARTRA the K line of ECM cannot be used for communication. The ECM 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 ECM H/W.

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

DTC Detecting Condition:

Diagnostic Circuit Diagram:

MONITOR SCANTOOL DATA
1. Check status
1. IGN "ON" & Engine "OFF"
2. Monitor the "ECU, KEY and Smartra 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, damage on the ECM or SMARTRA.
And this DTC has not been erased in previous repair. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO - Go to "Component Inspection" Procedure.

COMPONENT INSPECTION
1. 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 perform the key teaching procedure.
If the problem is corrected, replace transponder 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.