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Symptom: P1685-SKIM SYSTEM KEY COMMUNICATION TIMED OUT When Monitored and Set Condition: P1685-SKIM SYSTEM KEY COMMUNICATION TIMED OUT When Monitored: With the ignition on. Set Condition: Communication between the ECM and the SKIM is not completed within 2.0 seconds POSSIBLE CAUSES ECM PCI CIRCUIT OPEN INTERMITTENT CONDITION CHECK FOR SKIM COMMUNICATION AND DTCS TEST ACTION APPLICABILITY 1 NOTE: If the ECM detects and stores a DTC, the ECM also stores the t, erase the ECM DTCs. Cycle the ignition switch from OFF to ON. t for ECM DTCs. Does the DRBIII t display this DTC? All Yes → Go To 2 No → Go To 4 2 Turn the ignition on. All Yes → Refer to symptom list for problems related to SKIM Communica- tion and DTCs before continuing. No → Go To 3 200 DRIVEABILITY - DIESEL |