P1694

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





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'





Fig.1) This data show that 3 keys have been taught, ECU has been learnt, Key in key cylinder has been learnt and SMARTRA3 has been 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 since 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 requried 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 substitued for old one must be in "Virgin" or "Neutral" status and Pin code is requied 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 selet "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.

Diagnostic Circuit Diagram