LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2006 >> Relay 3.9 1, FWD >> Repair and Diagnosis >> Steering >> 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 be performed before Circuit Testing when diagnosing steering wheel controls.
  1. Ignition OFF, disconnect the harness connector at the left and right steering wheel control switches.
  2. Ignition ON, Radio ON, test for 6.5-9 volts between the voltage circuit and ground at the right switch harness connector.
    • If less than 6.5 volts, test the voltage circuit for short to ground or open/high resistance. If circuit tests normal, replace the radio.
    • If greater than 9 volts, test the voltage circuit for short to voltage. If circuit tests normal, replace the radio.
  3. Test for 6.5-9 volts from the voltage circuit and toggle to the signal circuits at the left and right switch harness connectors.
    • If less than 6.5 volts, test the signal circuit for an open/high resistance. If circuit tests normal, replace the radio.
    • If greater than 9 volts, test the signal circuit for short to voltage. If circuit tests normal, replace the radio.
  4. Ignition OFF, reconnect the right switch.
  5. Ignition ON, Radio ON, test for 6.5-9 volts between the voltage circuit and the left switch and ground at the left switch harness connector.
    • If less than 6.5 volts, test the voltage circuit to the left switch for a short to ground or open/high resistance. If the circuit tests normal, refer to component testing.
    • If greater than 9 volts, test the voltage supply circuit for the left switch for a short to B+.
  6. Pressing the right switch, test for 1-5 volts between the signal circuit and ground at the left switch harness connector.
    • If less than 1 volt, test the signal circuit for a short to ground.
  7. If all circuits test normal, refer to component testing.
scientia non olet · About LEMON Manuals