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DTC P1602: Pcm Not Programmed: Testing

  1. Ignition on, engine not running. With the DRBIII® scan tool, erase DTCs. With the DRBIII® scan tool program the PCM. Start the engine. Allow the engine to reach normal operating temperature. With the DRBIII® scan tool, read DTCs. Does the DTC reset? If yes, go to next step. If no, the PCM has been successfully programmed. Test is complete.
  2. The ignition switch must be left in the off position for a minimum of 10 seconds. Cycle the ignition switch to the off position and then back to run. Attempt to program the PCM. Start the vehicle and allow it to reach normal operating temperatures. With the DRBIII® scan tool, read DTCs. Does the DTC reset? If yes, replace and program the PCM. See PROGRAMMING . If no, the PCM has been successfully programmed into the PCM. Test is complete.
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