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Code 12

  1. Check connectors to instrument panel harness and dash harness. Repair as necessary. If connectors are okay, disconnect instrument panel ECU harness connector.
  2. Check continuity between ground and instrument panel ECU harness-side connector terminal No. 37 (Black wire). If continuity is present, replace instrument panel ECU. If continuity is not present, check circuit between instrument panel ECU and ground. Repair as necessary.
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