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Home >> Saturn >> 2007 >> Ion Red Line >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Secondary And Configurable Customer Controls) >> Diagnostic Information and Procedures >> Steering Wheel Controls Inoperative >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: It is recommended that Component Testing be performed before Circuit Testing when diagnosing steering wheel controls.
CAUTION: Refer to SIR Caution .
  1. Ignition OFF, disconnect the harness connector at the right steering wheel control switch.
  2. Ignition ON, Radio ON, test for 8.5-10.5 volts between the 10-volt reference circuit terminal 1 and ground.
    • If less than the specified value, test the 10-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than the specified value, test the 10-volt reference for a short to voltage. If the circuit tests normal, replace the radio.
  3. Test for 8.5-10.5 volts between the 10-volt reference circuit terminal 1 and signal circuit terminal 4.
    • If less than 8.5 volts, test the signal circuit for an open/ high resistance. If the circuit test normal, replace the radio.
    • If greater than 10.5 volts, test the signal circuit for short to voltage. If the circuit test normal, replace the radio.
  4. Install a 3A fused jumper wire between the 10-volt reference circuit terminal 1 and the signal circuit terminal 5.
  5. Disconnect the harness connector at left steering wheel control switch.
  6. Test for 8.5-10.5 volts between the signal circuit terminal 1 and ground.
    • If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  7. Test for 8.5-10.5 volts between the signal circuit terminal 1and the signal circuit terminal 4.
    • If less than the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  8. Ignition OFF, disconnect the C1 harness connector at the radio.
  9. Test for infinite resistance between the signal circuit terminal 11 and ground.
    • If less than the specified value, test the signal circuit for a short to ground.
  10. If all circuits test normal, test or replace switch.
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