DTC codes / Chrysler codes / P1699
P1699 means the engine control module (ECM) or powertrain control module (PCM) has not received any valid Chrysler Collision Detection (CCD) or J1850 bus messages from the climate control module (CCM) for a set period. The computer is not reporting a fault inside the CCM itself; it is detecting a communication timeout on the shared data bus that links the CCM to the rest of the vehicle.
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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