How to Fix Diagnostic Code P1699

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🚨 Diagnostic Profile

Vehicle Make: Chrysler

Description: No CCD J1850 Messages Received From The Climate Control Module (CCM). The body control network is not receiving expected communication from the Climate Control Module over the CCD (Chrysler Collision Detection) J1850 data bus. Typical causes include a fault in the CCM itself, wiring or connector damage on the CCD bus, a shorted or open bus circuit, or a fault in another module on the same network.

🚨 Repair Difficulty Tier

Tier: [Intermediate]

Diagnosis requires network testing, a scan tool capable of reading the CCD bus, and familiarity with Chrysler body wiring. Repair is often a connector or wiring repair, but module replacement and programming may be required.

🛠️ Resolution Steps

Step 1: Preliminary Inspection

  • Verify battery state of charge and check battery and charging system voltage (should read approximately 12.6V key-off, 13.5-14.7V running).
  • Confirm all fuses and relays for the CCM and body control circuits are intact using a test light or multimeter continuity check.
  • Visually inspect the CCM connector for corrosion, bent or backed-out pins, and secure seating, paying close attention to the twisted-pair CCD bus wire terminals.
  • Inspect CCD bus wiring harness routing for chafing, pinching, or heat damage, especially at harness pass-throughs, grommets, and areas near exhaust or suspension components.
  • Check ground connections serving the CCM and body control modules for corrosion or looseness, including chassis and engine block ground straps.
  • Check for aftermarket accessories (remote starters, alarms, aftermarket stereos) or recent wiring modifications that may have been spliced into the CCD bus circuit.

Step 2: Diagnostic Verification

  • Scan all modules for stored DTCs and record freeze frame data using a Chrysler-capable scan tool (DRB III, wiTECH, or an aftermarket scanner with CCD bus support).
  • With the ignition off and all modules disconnected from the bus, measure resistance across the CCD bus twisted pair at the DLC; the CCD bus is a single twisted-pair, unterminated, non-resistive bus, so continuity (near 0 ohms) should exist end-to-end with no unexpected opens.
  • With the key on, measure bus activity voltage at the DLC CCD+ and CCD- pins using a digital multimeter or scope; a healthy, actively communicating CCD bus will show fluctuating voltage typically in the 0-7V range as modules transmit, rather than a static or flat-lined voltage.
  • Check for shorts to voltage or ground on each CCD bus wire with the battery disconnected, using a multimeter in resistance/diode mode between each bus wire and chassis ground, and between each bus wire and battery positive.
  • Verify CCM power (ignition-switched and/or battery feed circuits) and ground supply at the module connector using a multimeter against a known good chassis ground; confirm voltage matches battery voltage within normal drop tolerances (no more than approximately 0.5V drop).
  • Disconnect modules one at a time (starting with the CCM, then other body modules sharing the CCD bus) to isolate a shorted or faulty module, rechecking bus continuity and communication status after each disconnection with the scan tool.
  • Confirm CCM location and connector access; on most Chrysler/Dodge/Jeep platforms of this era, the CCM is typically mounted behind the dash near the HVAC control head or integrated into the dash panel, accessible after removing the center bezel or lower dash trim panel.

Step 3: Resolution & Reset Process

  • Repair any damaged wiring, connectors, or grounds identified in prior steps, using proper soldering or heat-shrink crimp splicing methods and weatherproof sealing to maintain twisted-pair integrity on the CCD bus.
  • Replace the CCM only if power, ground, and bus integrity are confirmed good and the module fails to communicate or respond to scan tool queries.
  • Program or initialize the replacement CCM with the correct VIN-specific software and configuration data as required, using a factory-level tool (wiTECH) or dealer/locksmith programming access, as CCM replacement on CCD-bus Chrysler vehicles typically requires module initialization to the vehicle’s body control network.
  • Clear all stored DTCs across all modules and perform a battery disconnect (10-15 minutes) or manufacturer-specified module reset/relearn procedure to allow all modules to re-establish bus communication.
  • Road test and verify the CCD bus communicates normally with the CCM and the climate control system (blend doors, blower speed, mode doors) functions as expected through the full range of operation.
  • Re-scan all modules to confirm no active or pending communication faults (such as U-codes for lost communication) remain on the network.

📦 Parts, Labor, and Budget Estimates

Required Components/Software: Wiring repair materials (butt connectors, heat-shrink tubing, twisted-pair compatible wire, terminal pins), replacement CCM module if confirmed faulty, and a factory-level diagnostic/programming tool subscription (such as wiTECH) or dealer programming service for module initialization.

Average Component Price: Wiring and connector repair materials typically range from $15-$60 for a shop-performed splice repair (parts only); a replacement CCM module typically ranges from $150-$450 depending on sourcing (aftermarket, remanufactured, or OEM dealer part), with OEM dealer-sourced modules often running $300-$600 before programming fees.

Estimated Labor Hours: Diagnostic time alone typically runs 1.0-2.0 shop book hours due to the network isolation process; a wiring/connector repair adds approximately 0.5-1.5 hours depending on harness accessibility; CCM replacement with required module programming/initialization typically adds 1.0-2.0 hours, for a combined total estimate of approximately 2.0-4.5 shop labor hours and $150-$700+ total out-the-door cost depending on whether the root cause is a wiring repair or full module replacement with dealer programming.