P1600 — Suzuki — Jimny SN413: ECM–TCM serial communication

Suzuki’s 2002-edition Jimny SN413 manual assigns P1600 to communication between engine and transmission controllers.

Meaning, symptoms, causes and checks

Suzuki’s 2002-edition Jimny SN413 manual assigns P1600 to communication between engine and transmission controllers. The steps below concern that automatic-transmission configuration.

Affected system: Controller communication

Possible causes

  • Open/shorted communication wiring or missing TCM power/ground.

What to check

  • Check the serial signal, connections and TCM supplies against the Jimny diagram; assess modules after ruling out circuit faults.