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Home >> Mazda >> 1998 >> MPV ES, 3.0 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Testing >> Diagnostic Trouble Codes >> DTC P1601: Communication Line Error (Automatic Transmission) >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Inspect all applicable harness connectors. Repair as needed. Turn ignition off. Disconnect PCM and TCM harness connectors. PCM is mounted to passenger floor, behind glove box. TCM is mounted greater than steering column, behind instrument panel. Using ohmmeter, check continuity between terminal No. 2H on PCM harness connector and terminal No. 2N on TCM harness connector. If continuity exists, go to next step. If continuity does not exist, repair Yellow/Green wire.
  2. Check continuity between terminal No. 2G on PCM harness connector and terminal No. 2K on TCM harness connector. If continuity exists, go to next step. If continuity does not exist, repair Light Green wire.
  3. Erase DTC. See CLEARING CODES in TESTS W/CODES - INTRODUCTION article. If DTC is present, replace PCM. If DTC is not present, intermittent poor harness connection may have caused DTC to originally set.
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