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11.9 Failure in Driver Stage of Malfunction Indicator Lamp (MIL) Failure codes: P1677, P1678, P1679 No. Operating steps Result Follow up steps 1 Put the ignition switch to “ON”
Next step Yes Check the circuit 2 Disassemble the dashboard, and then use a multimeter to check if it is break or short circuit between 29#, 30# pins at instrument end and 62#, 81# pins of ECU. No Next step Yes Next step 3 Replace the instrument and then check if it is normal No Replace the instrument Yes Replace ECU 4 Replace ECU, and then re-check if it works normally. No Check other part Yes Replace the harness 5 Check CAN circuit for the place where is grounding or short. No Check other part
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