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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connectors at the components listed below.
    • S48C Multifunction Switch 1 - Instrument Panel
    • S48D Multifunction Switch 2 - Instrument Panel
    • S32LR Seat Heating Switch - Left Rear (with CJ2/KA6)
    • S32RR Seat Heating Switch - Right Rear (with CJ2/KA6)
  2. Ignition ON, place the S36 Instrument Panel Dimmer Switch in the HIGH position for high backlighting intensity.
  3. Verify a test lamp illuminates between each control circuit terminal listed below and ground.
    • S48C Multifunction Switch 1 - Instrument Panel terminal 3
    • S48D Multifunction Switch 2 - Instrument Panel terminal 3
    • S32LR Seat Heating Switch - Left Rear terminal 6 (with CJ2/KA6)
    • S32RR Seat Heating Switch - Right Rear terminal 6 (with CJ2/KA6)
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
    • If the test lamp illuminates 
  4. Place the S36 Instrument Panel Dimmer Switch in the LOW position for low backlighting intensity.
  5. Verify a test lamp does not illuminate at FULL intensity between each control circuit terminal listed below and ground.
    • S48C Multifunction Switch 1 - Instrument Panel terminal 3
    • S48D Multifunction Switch 2 - Instrument Panel terminal 3
    • S32LR Seat Heating Switch - Left Rear terminal 6 (with CJ2/KA6)
    • S32RR Seat Heating Switch - Right Rear terminal 6 (with CJ2/KA6)
    • If the test lamp illuminates at full intensity 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit terminal and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K9 Body Control Module.
    • If the test lamp does not illuminate at full intensity 
  6. Test or replace the component with the inoperative indicator.
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