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HOMESERVICE MANUALSGMC2013SAVANA H1500, VAN CARGOREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTILOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION & PROCEDURESDTC C0710CIRCUIT/SYSTEM TESTING
2013 GMC Savana H1500, Van Cargo

Circuit/System Testing

2013 GMC Savana H1500, Van CargoSECTION Circuit/System Testing
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the steering wheel speed/position sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 20 Ω between the low reference circuit terminal 2 and ground.
    • If 20 Ω or greater 
    1. Ignition Off, disconnect the harness connector at the EBCM.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the EBCM.
    • If less than 20 Ω 
  3. Ignition ON.
  4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
    • If less than 4.8 V 
    1. Ignition OFF, disconnect the harness connector at the EBCM.
    2. Test for infinite resistance between the 5 V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test to less than 2 Ω in the 5 V reference circuit end to end.
      • If 2 Ω for greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the EBCM.
    • If greater than 5.2 V 
    1. Ignition OFF, disconnect the harness connector at the EBCM, ignition ON.
    2. Test for less than 1 V between the 5 V reference circuit terminal 1 and ground
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the EBCM.
    • If between 4.8-5.2 V 
  5. Test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and the signal circuit terminal 6.
    • If less than 4.8 V 
    1. Ignition OFF, disconnect the harness connector at the EBCM.
    2. Test for less than 2 Ω in the signal circuit end to end.
      • If greater than 2 Ω, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the EBCM.
    • If greater than 5.2 V 
    1. Ignition OFF, disconnect the harness connector at the EBCM, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If greater than 1 V, repair the short to voltage on the circuit.
      • If less than 1 V, replace the EBCM.
    • If between 4.8-5.2 V 
  6. Ignition OFF, disconnect the harness connector at the EBCM.
  7. Test for infinite resistance between the signal circuit terminal 9 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  8. Connect the harness connector at the EBCM.
  9. Ignition ON.
    10. NOTE:

    When measuring voltage at the steering wheel speed/position sensor harness connector, the voltage values are based on a battery charge of 12.5 V and the steering wheel is in the center position.

  10. Test for 6.8-11 V between the signal circuit terminals listed below and ground.
    • Terminal 3
    • Terminal 4
    • Terminal 5
    • If less than 6.8 V 
    1. Ignition OFF, disconnect the harness connector at the EBCM.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω on the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the EBCM.
    • If greater than 11 V 
    1. Ignition OFF, disconnect the harness connector at the EBCM, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the EBCM.
    • If between 6.8-11 V 
  11. Test or replace the steering wheel speed/position sensor.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.