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Home >> Chrysler >> 2003 >> Intrepid ES, 3.5 V >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Automatic Transmission Diagnosis) >> Diagnostic Tests >> DTC P1652: Serial Communication Link Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If PCM DTC P0700 is present, erase PCM DTC to turn MIL off after performing transaxle repairs.
  1. Using scan tool, read engine DTCs. If any engine DTCs are present, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no engine DTCs are present, go to next step.
  2. Using scan tool, erase DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Start engine and idle for 20 seconds. Check if DTC P1652 has reset. If DTC P1652 is present, go to next step. If DTC P1652 is not present, go to step  4.
  3. If no other potential causes for DTC P1652 remain, PCM is assumed to be faulty. Repair or replace as necessary. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION.
  4. Conditions necessary to set DTC are not present at this time. Ensure to check for any communication DTCs or customer complaints concerning possible bus problem. This includes all modules on vehicle. If bus problems exist, see appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. Using wiring diagram as a guide, inspect wiring and connectors associated with circuits in question. See WIRING DIAGRAMS . Wiggle wires while checking for shorted and open circuits. Repair as necessary. If circuits are okay, testing is complete.
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