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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> Heated Seat Inoperative - Rear >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate heated seat switch.
  2. Test for less than 5 ohms between the ground circuit terminal J and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, observe the appropriate scan tool Rear Seat HVC Mode parameter. The reading should be Off.
    • If not the specified value, test the signal circuits terminal A and terminal G for a short to ground. If the circuits tests normal, replace the RHSM.
  4. Install a 3A fused jumper wire between the signal circuit terminal G and ground. Verify the scan tool Rear Seat HVC Mode parameter reading is Back and Cushion.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the RHSM.
  5. Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Rear Seat HVC Mode parameter reading is Back Only.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the RHSM.
  6. If all circuits tests normal, test or replace the heated seat switch.
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