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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Engine Controls - Self-Diagnostics - 3.9L & 5.9L) >> Diagnostic Tests >> DTC P1685: Wrong Or Invalid Key MSG Received From Skim >> Testing

DTC P1685: Wrong Or Invalid Key MSG Received From Skim: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition on, with engine off. With the DRBIII(R) scan tool, read the DTCs and record the related freeze frame data. Is Good Trip Counter displayed and equal to zero? If yes, go to next step. If no, go to step  7 .
  2. With the DRBIII(R) scan tool, attempt to communicate with the SKIM. Can the DRBIII(R) scan tool communicate with the SKIM? If yes, go to next step. If no, perform BUS +/- SIGNAL OPEN FROM SKIM system test in the appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
  3. With the DRBIII(R) scan tool, check for SKIM DTCs. Are any DTCs present in the SKIM? If yes, repair all SKIM DTCs. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If no, go to next step.
  4. With the DRBIII(R) scan tool, display the VIN that is programmed in the PCM. Has a VIN been programmed into the PCM? If yes, go to next step. If no, program the correct VIN into the PCM and retest.
  5. With the DRBIII(R) scan tool, display the VIN that is programmed in the PCM. Was the correct VIN programmed into the PCM? If yes, go to next step. If no, replace the PCM. See PROGRAMMING  .
  6. Turn the ignition off. Replace and program the SKIM. See SENTRY KEY IMMOBILIZER MODULE  under PROGRAMMING. Turn ignition on, with engine off. With the DRBIII(R) scan tool, erase all SKIM and PCM DTCs. Attempt to start and idle the engine. With the DRBIII(R) scan tool, read the PCM DTCs. Does the DRBIII(R) scan tool display this DTC? If yes, replace the PCM. See PROGRAMMING  . If no, test is complete.
    7. NOTE: This DTC could have been set if the SKIM harness connector was disconnected, or if the SKIM was recently replaced. All keys that the customer uses for this vehicle must be tested to verify they are operating properly. Ensure the customer is not attempting to use a non-SKIM duplicate key. If this DTC cannot be reset, it could have been an actual theft attempt.
  7. Turn ignition on, with engine off. Verify the correct VIN is programmed into the PCM and SKIM. Turn the ignition off. With the next customer key, turn the ignition on and crank the engine to start. With the DRBIII(R) scan tool, read the PCM DTCs. Is the Starts Since Set counter for DTC P1685 displayed and equal to zero? If yes, replace the ignition key. If no, test is complete.
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