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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Steering Wheel & Steering Column) >> Diagnostic Information and Procedures >> Heated Steering Wheel Malfunction >> 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 heated steering wheel control module.
  2. Test for less than 5.0 ohms between ground terminal 1 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between B+ terminal 4 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, connect a test lamp between signal circuit terminal 3 and B+. Place the heated steering wheel switch in the OFF position.
    • If the test lamp illuminates, test the signal circuit for a short to ground, If all circuits test normal, test or replace the heated steering wheel control switch.
  5. Connect a test lamp between signal circuit terminal 3 and B+. Place the heated steering wheel switch in the ON position.
    • If the test lamp does not illuminate, test the signal circuit for a short to voltage or open/high resistance and test the ground circuit for an open/high resistance. If all circuits test normal, test or replace the heated steering wheel control switch.
  6. Verify that a test lamp does not illuminate between control circuit terminal 7 and ground.
    • If the test lamp illuminates, test for a short to voltage on the heated steering wheel element control circuit.
  7. Test the heating element resistance between control circuit terminal 7 and ground using the appropriate RPO code values:
    • NR7: 1.5-2.0 ohms
    • N30/N50: 0.6-0.9 ohms
    • If not within the specified range, test the heating element control circuit for a short to ground or open/high resistance and the ground circuit for an open/high resistance.If all circuits test normal, replace the heated steering wheel.
  8. Verify that a test lamp does not illuminate between signal circuit terminal 5 and ground.
    • If the test lamp illuminates, test for a short to voltage on the heated steering wheel element signal circuit.
  9. Test for 6000-35000 ohms between signal circuit terminal 5 and ground.
    • If not within the specified range, replace the heated steering wheel.
  10. If all circuits test normal, replace the heated steering wheel control module.
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