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DTC codes / Chrysler codes / P1695

P1695 · ChryslerNo CCD J1850 Message From BCM

P1695 on a Chrysler vehicle means the Powertrain Control Module (PCM) has not received any valid CCD (Chrysler Collision Detection) bus messages from the Body Control Module (BCM) for a set period. The PCM expects regular status updates from the BCM over this dedicated communication network, and when those messages stop arriving, it stores this code to flag a communication breakdown.

SystemPowertrain
Code typeChrysler specific
SeverityMedium
Fix difficultyProfessional
AreaComputer and output circuits

Symptoms you may notice

  • The check engine light or service engine soon light is illuminated on the instrument cluster.
  • Often no symptoms besides the warning light, especially if the BCM is still powering basic functions independently.
  • Erratic operation of body electrical features such as interior lights, power windows, or the remote keyless entry system.
  • The vehicle may fail to start or stall intermittently if the BCM cannot communicate with the PCM for theft-deterrent or fuel enable signals.
  • Instrument cluster gauges or warning lamps may behave unpredictably or fail to illuminate during the bulb check.
  • Other modules on the CCD bus may also set communication codes, causing multiple warning lights to appear at once.

Common causes, most likely first

  1. A failed or internally shorted Body Control Module (BCM) that no longer transmits on the CCD bus.
  2. Open or shorted wiring in the CCD bus circuit between the BCM and the PCM, often from chafing or corrosion.
  3. Poor terminal tension or corrosion at the BCM or PCM connectors, interrupting the bus signal.
  4. A blown fuse or poor ground connection that removes power or ground from the BCM, preventing it from communicating.
  5. Another module on the CCD bus holding the bus voltage low and preventing BCM messages from being heard.
  6. A faulty PCM that is unable to receive or process CCD bus messages, though this is less common than BCM or wiring faults.

How to diagnose and fix it

  1. Verify battery voltage and condition, then check all fuses and grounds that supply the BCM and PCM.
  2. Inspect the BCM and PCM connectors for corrosion, pushed-out terminals, or loose pins, and clean or repair as needed.
  3. Use a scan tool to check for communication with the BCM and other modules on the CCD bus to confirm whether the BCM is alive.
  4. Measure CCD bus voltage at the BCM and PCM connectors with a digital multimeter to look for opens, shorts, or abnormal bias voltage.
  5. Perform a wiggle test on the wiring harness between the BCM and PCM while watching live data or bus voltage to catch intermittent faults.
  6. If the BCM is unresponsive and powers and grounds are good, substitute a known-good BCM or perform a bench test before replacement.
  7. After any repair, clear the code and verify that the PCM receives continuous BCM messages with no recurrence during a road test.

CCD Bus Faults That Mimic a Dead BCM

  • A single failed module on the CCD bus can pull the entire bus voltage down and make the BCM appear dead, so always check bus voltage before condemning the BCM.
  • Corroded ground studs behind the kick panel or under the hood are a frequent hidden cause of lost BCM communication on older Chrysler vehicles.
  • The BCM may still operate door locks and interior lights normally while its CCD transmitter section has failed, so functional body electronics do not prove the BCM is communicating.
  • Aftermarket alarms or remote starters spliced into the CCD bus wiring are a common source of bus shorts that set P1695 without any factory component failure.
  • Replacing the BCM without checking for a shorted CCD bus wire can destroy the new module as soon as the key is turned on.

Can I keep driving with P1695?

You can usually drive the vehicle short distances to a repair shop, but avoid long trips or relying on body electrical features until the fault is repaired. If the engine cranks but will not start or stalls unexpectedly, stop driving and have the vehicle towed because the BCM communication loss may disable the theft-deterrent system.

Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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