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Circuit/System Testing

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IMPORTANT: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
  • The Seat Position Sensor (SPS)
  • The Sensing and Diagnostic Module (SDM) module
  • The seat position sensor wiring harness connector
  • The SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the SPS.
  2. Disconnect the harness connector at the SDM.
  3. Ignition ON, test for less than 1 volt between the SPS signal circuit terminal 29 and ground.
    • If greater than the specified range, test the circuit for a short to voltage.
  4. Ignition ON, test for less than 1 volt between the SPS low reference circuit terminal 28 and ground.
    • If greater than the specified range, test the circuit for a short to voltage.
  5. Test for infinite resistance between the SPS signal circuit terminal 29 and ground.
    • If less than infinite resistance, test the circuit for a short to ground.
  6. Test for less than 1 ohm of the SPS signal circuit between the SDM harness connector terminal 29 and the SPS harness connector terminal 2.
    • If greater than the specified range, test the circuit for an open/high resistance.
  7. Test for less than 1 ohm of the SPS low reference circuit between the SDM harness connector terminal 28 and the SPS harness connector terminal 1.
    • If greater than the specified range, test the circuit for an open/high resistance.
  8. If all circuits test normal, replace the SPS.
  9. Reconnect all SIR components. Ignition ON, with a scan tool clear and recheck for DTCs.
    • If the front end sensor DTC returns and is current, replace the SDM. After replacement, refer to Repair Verification .
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