P1691

DTC P1691 IMMOBILIZER-ANTENNA COIL ERROR

DTC Detecting Condition:

Diagnostic Circuit Diagram:

INSPECTION PROCEDURE
1. PROBLEM VERIFICATION
1. Connect the hi-scan (pro) to data link connector.
2. Turn the ignition switch to ON and verify the DTC "P1691" is displayed.
3. Erase the DTC "P1691" with the hi-scan (pro) and then monitor again.
4. Is the same code displayed ?

NO - Problem is intermittent and ICM memory was not cleared.

YES - Check for continuity between antenna coil and ICM.

2. CHECK FOR CONTINUITY BETWEEN ANTENNA COIL AND ICM
1. Check for continuity between ICM harness connector (M23-2) terminal 1 and antenna coil harness connector (M11) terminal 2.
2. Check for continuity between ICM harness connector (M23-2) terminal 3 and antenna coil harness connector (M11) terminal 1.
3. Is there continuity ?

NO - Repair an open in the wire between the antenna coil and the ICM.

YES - If all the tests are OK, replace the antenna coil assembly and recheck.

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.