P1691

DTC P1691 ANTENNA COIL ERROR

Component Location:

GENERAL DESCRIPTION
This wireless communication runs on RF (Radio frequency of 125 kHz). The SMARTRA is mounted at the ignition lock close to the antenna coil 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 EMS 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 "KEY STATUS" and "ECU STATUS" Parameter on the Scantool.

Specification : "LEARNT"

4. 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 "Inspection & Repair" 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 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 transponder and check for proper operation.
- If the problem is corrected, replace transponder 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 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.