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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (3 Of 5)) >> Diagnostic Information and Procedures >> DTC P10D9, P20B9, P20BA-P20BC, P214F, or P21DD >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: A38 Reductant Pump and Sensor Assembly
  3. Test for 1 to 6 ohms between the test points: Control terminal 9 & Control terminal 11
    • If not between 1 and 6 ohms 

      Replace the component: A38 Reductant Pump and Sensor Assembly

    • Go to next step: If between 1 and 6 ohms 
  4. Test for infinite resistance between the test points: Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the component: A38 Reductant Pump and Sensor Assembly

    • Go to next step: If infinite resistance 
  5. All OK.
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