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Home >> Kia >> 2012 >> Optima SX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 50 (Body Control Module Diagnosis - HEV) >> DTC B1690: CAN timeout between IPM and SJB >> Inspection Repair >> W/Harness Inspection >> SJB Signal Circuit Inspection
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SJB Signal Circuit Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Check CAN High Line.
    1. IG "ON" & ENG "OFF".
    2. After connect GDS, select "Oscilloscope" mode.
    3. Measure the signal waveform on SJB CAN High line.

      Specification:  Refer to "SIGNAL WAVEFORM "

      Fig 1: Measuring Signal Waveform On SJB CAN High Line
      G08314435Courtesy of KIA MOTORS AMERICA, INC.
      Fig 2: Identifying Body Control Module And Smart Junction Box Connector Terminals End View
      G08314436Courtesy of KIA MOTORS AMERICA, INC.
    4. Does the measured signal waveform follow the specification?

      YES 

      • Go to " 2 CAN Low Line Inspection" procedure.

      NO 

  2. Check CAN Low Line.
    1. IG "ON" & ENG "OFF".
    2. After connect GDS, select "Oscilloscope" mode.
    3. Measure the signal waveform on SJB CAN Low line.

      Specification:  Refer to "SIGNAL WAVEFORM "

      Fig 3: Measuring Signal Waveform On SJB CAN Low Line
      G08314437Courtesy of KIA MOTORS AMERICA, INC.
      Fig 4: Identifying Body Control Module And Smart Junction Box Connector Terminals End View
      G08314438Courtesy of KIA MOTORS AMERICA, INC.
    4. Does the measured signal waveform follow the specification?

      YES 

      NO