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DTC P1605 - Automatic Transmission (A/T) Control

  1. Check Input Signal Circuit  - Turn ignition off. Locate A/T control unit in left kick panel. Disconnect A/T control unit harness connector. Disconnect ECM harness connectors.
  2. Using an ohmmeter, check continuity between ECM harness connector terminal No. 7 (Purple wire) and A/T control unit harness connector terminal No. 13 (Purple wire). If no continuity exists, repair open in Purple wire. If continuity exists, check connectors and terminals for damage or corrosion. Repair as necessary and retest.
Fig 1: Identifying A/T Control Unit Connector Terminals
G96I10320Courtesy of NISSAN MOTOR CO., U.S.A.
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