P1691

Component Location





General Description

This wireless communication runs on RF (Radio frequency of 125 kHz). The antenna coil is mounted on the top of ignition lock for RF transmission and receiving. The RF signal from the transponder received by the antenna coil is converted into messages for serial communication by the SMARTRA device. And the received messages from the ECM are converted into an RF signal, which is transmitted, to the transponder by the antenna.

DTC Description

The ECM sets DTC P1691 if there's any fault in immobilizer antenna coil.

DTC Detecting Condition





Monitor Scantool Data

1. Connect scantool to Data Link Connector(DLC).
2. IGN "ON" & Engine "OFF"
3. 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
4. Have "ECM, KEY and SMARTR" status been learnt?
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 coil antenna
(1) Ignition "OFF"
(2) Disconnect SMARTRA.
(3) Measure resistance between terminal "1" and "2" of SMARTRA.

Specification : Approx 8.5 Ohms


(4) Is the measured resistance within specifications?
YES
> Go to "Check SMARTRA" procedure.
NO
> Check for open or short in antenna coil. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
2. Check SMARTRA
(1) IGN "ON" & Engine "OFF"
(2) Neutralize Both "SMARTRA" and "ECM" and Register transponder key with scantool.

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

(3) Are Neutralizing and Registering completed normally?
YES
> Perform all the key teaching procedure with scantool. (All the keys must be retaught) and then, go to "Verification of Vehicle Repair" Procedure.

NOTE:
Never change the password after SMARTRA is neutralized with scantool
Otherwise, Virgin TP only possible to register.

NO
> Substitute with a known-good SMARTRA and Perform Key teaching procedure.
If the problem is corrected, replace SMARTRA and then go to "Verification of Vehicle Repair" procedure.

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