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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Electronic Transmission Range Select >> Diagnostic Information And Procedures >> DTC P17E0, P17E1, P17E2: Transmission Range Selector Controls Ignition >> Circuit/System Testing
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Circuit/System Testing

NOTE: Some control module ground circuits may require up to 20 min after the ignition is turned off before achieving a resistance reading of less than 5 Ω. In most cases the readings will drop below 20 Ω within 1 min indicating the control module is going to sleep.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the A97 Transmission Range Selector Controls. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between ground circuit terminal 12 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω 
  3. Verify a test lamp illuminates between B+ circuit terminal 9 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the appropriate control module.
    • Go to next step: If the test lamp illuminates 
  4. Ignition ON.
  5. Verify a test lamp illuminates between ignition circuit terminal 17 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the appropriate control module.
    • Go to next step: If the test lamp illuminates 
  6. Replace the A97 Transmission Range Selector Controls.
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