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Home >> Mazda >> 1998 >> Millenia S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Testing - 2.3L >> Diagnostic Trouble Codes >> DTC P1628: Powertrain Control Module (Pcm)/Traction Control System (TCS) Line Communication Error >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Inspect all applicable harness connectors. Repair as needed. Ensure ignition is off. Disconnect PCM harness connector. PCM is mounted in front of center console, under radio. Disconnect ABS/TCS control module harness connector. ABS/TCS control module is mounted to upper left kick panel, behind instrument panel, next to TCM.
  2. Check continuity between terminal No. 3W on PCM harness connector and terminal No. 1P on ABS/TCS control module harness connector. If continuity exists, go to next step. If continuity does not exist, repair Orange/Black wire.
  3. Erase DTCs. See CLEARING CODES in TESTS W/CODES - INTRODUCTION article. If DTC resets, replace PCM. If DTC is not present, intermittent poor harness connection may have caused DTC to originally set.
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