How to Fix Diagnostic Code P1695

by

🚨 Diagnostic Profile

Vehicle Make: Chrysler

Fault Description: No CCD J1850 Message From BCM

This fault indicates that a module on the CCD (Chrysler Collision Detection) data bus is not receiving the expected message traffic from the Body Control Module (BCM). The condition can stem from a BCM power or ground issue, a bus wiring fault, a shorted or open bus circuit, a failed module on the network, or a scan tool communication problem. Confirm the complaint and the module-specific symptoms before replacing any component.

🚨 Repair Difficulty Tier

Tier: [Intermediate]

Diagnosis requires a scan tool capable of reading network communication status, a working knowledge of multiplexed bus behavior, and the ability to read wiring diagrams and perform voltage, resistance, and continuity tests. Repair is typically straightforward once the faulty circuit or module is isolated.

🛠️ Resolution Steps

Step 1: Preliminary Inspection

  • Verify battery state of charge (12.4V or higher at rest) and inspect battery terminals and main cable connections for corrosion or looseness.
  • Check BCM-related fuses and relays with a visual and continuity check, referencing the Power Distribution Center (PDC) under the hood and the Junction Block (JB) fuse panel under the dash, both labeled on the fuse box lid legend for the specific model year.
  • Inspect the BCM harness connectors for corrosion, spread pins, backed-out terminals, or water intrusion; the BCM is commonly mounted under the dash near the steering column or behind the kick panel depending on platform.
  • Confirm BCM chassis and body ground circuits are clean, tight, and free of corrosion at the nearest body ground strap or eyelet ground point serving the BCM circuit.
  • Review TSBs and recall records for the specific model year and BCM part number, as CCD bus communication faults were commonly addressed via connector pigtail repair kits or BCM reflash campaigns on certain model years.
  • Check for recent aftermarket accessory, remote start, alarm, or stereo wiring modifications that may have tapped into or damaged the CCD bus circuit.

Step 2: Diagnostic Verification

  • Connect a scan tool (Chrysler DRB III, StarSCAN, wiTECH, or an aftermarket tool with verified CCD/J1850 bus support) and confirm whether the BCM is reporting or is absent from the network module scan.
  • Record all active and stored DTCs across every module on the bus to identify whether other modules are also reporting loss-of-communication or bus errors, which helps distinguish a BCM fault from a shared bus wiring fault.
  • Measure BCM supply voltage (B+) at the main power input circuit using a digital multimeter with the key on, engine off; voltage should read battery voltage (approximately 12V) minus normal circuit drop.
  • Measure BCM ground circuit resistance to a known good chassis ground point; resistance should read close to 0 ohms (typically under 5 ohms) with no voltage drop exceeding standard acceptable limits under load.
  • Check CCD bus circuit (two-wire twisted pair, commonly referred to as CCD Bus (+) and CCD Bus (-)) continuity between the BCM connector and the data link connector (DLC) under the dash using a multimeter in continuity/low-ohms mode with the key off and battery disconnected.
  • Check CCD bus circuits for shorts to power or ground using a multimeter: with the ignition off and battery disconnected, resistance to ground and to B+ should read as an open circuit (infinite resistance); any continuity indicates a short.
  • Check bus signal activity with a lab scope or scan tool bus-monitor function at the DLC CCD terminals; a healthy CCD bus shows both bus wires biased at a similar standing voltage (typically near mid-battery voltage) with small, consistent differential voltage swings when traffic is present. A flat-lined or stuck-high/stuck-low reading indicates a shorted bus or a module holding the bus.
  • Disconnect suspect modules one at a time (starting with aftermarket or most recently serviced modules) and recheck bus communication after each disconnection to isolate a module that is shorting or loading down the bus.

Step 3: Resolution & Reset Process

  • Repair any identified open, short, or high-resistance circuit, or replace damaged connectors and terminals using proper OEM-spec crimp tooling and weatherproof splice methods — do not solder primary bus wiring without using approved heat-shrink adhesive-lined splices on vehicles exposed to moisture.
  • Clean and tighten all BCM and chassis ground points, and reseat all connectors until fully latched and locked.
  • Replace the BCM only after wiring, power, and ground circuits have been verified good and the BCM still fails to communicate or power up internally.
  • Program or initialize the replacement BCM with the correct VIN, RKE codes, and vehicle configuration data using the appropriate Chrysler factory service tool (wiTECH/StarMOBILE or dealer-level programming); aftermarket remanufactured BCMs may require VIN-matching through the supplier prior to installation.
  • Clear all stored DTCs across all modules and perform a full key cycle (off for at least 30 seconds, then on) to allow the network to re-initialize.
  • Verify all modules respond to the scan tool network scan and that no bus-related DTCs return after a full drive cycle, including multiple key cycles, accessory operation (door locks, windows, HVAC controls), and a road test to confirm stable network communication under vibration and thermal cycling.

📦 Parts, Labor, and Budget Estimates

Required Components/Software:

  • Scan tool with CCD/J1850 bus communication support (Chrysler DRB III, StarSCAN, wiTECH, or verified aftermarket equivalent) and current software subscription
  • Digital multimeter and automotive test leads; lab scope recommended for bus waveform analysis
  • Wiring repair kit, OEM-spec terminals, heat-shrink splice connectors, and crimp tool, as needed
  • Replacement BCM (new, remanufactured, or used/VIN-matched), if required
  • Replacement connector pigtails or ground hardware, if required

Average Component Price:

  • Diagnostic scan tool rental/software access (shop-level): $100–$250 per diagnostic session if outsourced; owned professional scan tool $1,500–$5,000+
  • Wiring repair materials (terminals, splice kits, connector pigtails): $15–$75
  • Replacement BCM: used/salvage $75–$200; remanufactured $200–$450; new OEM $350–$700+ depending on model year and features (keyless entry, security, etc.)
  • BCM programming/initialization fee (dealer or mobile programming service): $100–$250

Estimated Labor Hours:

  • Diagnosis and verification (bus testing, voltage/ground checks, module scan): 0.8–1.5 hours
  • Wiring or connector repair, if required: 0.5–1.5 hours depending on harness accessibility
  • BCM removal, replacement, and programming, if required: 0.7–1.3 hours (varies by platform/dash disassembly requirements)
  • Verification and drive cycle confirmation: 0.3–0.5 hours