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Home >> Chevrolet >> 2006 >> HHR LS, Automatic >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Steering Wheel & Steering Column >> Diagnostic Information and Procedures >> Steering Wheel Controls Inoperative >> Circuit/System Testing

Circuit/System Testing

CAUTION: Refer to SIR Caution .
IMPORTANT: It is recommended that Component Testing is performed before Circuit Testing when diagnosing steering wheel controls.
  1. Ignition OFF, disconnect the harness connector at the audio steering wheel control switch.
  2. Ignition ON, Radio ON, test for 9.5-10.4 volts between the 10 volt reference circuit and ground at the switch harness connector
    • If less than 9.5 volts, test 10-volt reference circuit for short to ground or open/ high resistance. If circuit test normal, replace radio.
    • If greater than 10.4 volts, test the 10-volt reference circuit for short to voltage. If circuit test normal, replace radio.
  3. Ignition ON, Radio ON, connect a test lamp between the signal circuit to the radio and ground at the switch harness connector. Verify lamp does not illuminate.
    • If test lamp illuminates, test the signal circuit for short to voltage. If circuit test normal, replace radio.
  4. Ignition OFF, test for less than 1.0 ohm of resistance, between the signal circuit and ground at the switch harness connector.
    • If greater than 1.0 ohm, test the signal circuit for open/high resistance. If circuit test normal, replace radio.
  5. Ignition OFF, disconnect harness connector at the radio and the switch.
  6. Test for infinite resistance between the signal circuit and ground at the radio harness connector.
    • If less than infinite resistance, test the signal circuit for short to ground.
  7. If circuit test normal, test or replace switch.
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