DTC P1686: No Skim Bus Message Received: Testing
- Turn ignition on. Using scan tool, check for any PCM DTCs. If DTC P1686: NO SKIM BUS MESSAGE RECEIVED is present, go to next step. If DTC P1686: NO SKIM BUS MESSAGE RECEIVED is not present, go to step 4.
- Using scan tool, attempt to access SKIM. Using scan tool, select THEFT ALARM, SKIM, then check for DTCs. If scan tool communicates with SKIM, go to next step. If scan tool does not communicate with scan tool, go to BUS +/- SIGNAL OPEN FROM SKIM under COMMUNICATIONS in BODY CONTROL MODULES - CONCORDE, INTREPID, LHS & 300M article in ACCESSORIES & EQUIPMENT.
- Turn ignition off. Disconnect PCM connectors. PCM is located on left side of engine compartment, between Power Distribution Center (PDC) and Transmission Control Module (TCM). See Figure. Inspect connectors for damaged pins, corrosion and loose terminals. Repair connectors as necessary. If connectors are okay, disconnect SKIM connector. SKIM is located on steering column. Measure resistance of Violet/Yellow wire between terminal No. 2 at SKIM harness connector and terminal No. 59 at PCM C2 harness connector. See Figure and Fig 1 . If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair PCI bus circuit (Violet/Yellow wire) between PCM and SKIM. See DATA LINK CONNECTORS article in WIRING DIAGRAMS.
- Turn ignition off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. If connectors and wiring harness are okay, no problem is indicated at this time. Check for any related technical service bulletins that may apply.
NOTE:
PCI bus circuit (Violet/Yellow wire) between PCM and SKIM runs through Body Control Module (BCM).