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Home >> Chevrolet >> 2022 >> Tahoe PPV, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (3 Of 5)) >> Diagnostic Information and Procedures >> DTC P10DA or P10DB >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: K115 Reductant Control Module
  3. Test for less than 1 V between the test points: Ignition circuit terminal 30 & Ground
    • If 1 V or greater 
    1. Remove the component: F47UA Fuse @ X50A Fuse Block - Underhood
    2. Test for less than 1 V between the test points: F47UA Fuse - Input terminal & Ground
      • If 1 V or greater - Replace the component: KR75 Engine Controls Ignition Relay
      • Go to next step: If less than 1 V
    3. Test for less than 1 V between the test points: Ignition circuit terminal 30 @ Control module harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
    • Go to next step: If less than 1 V 
  4. Ignition/Vehicle - On
  5. Test for greater than 9 V between the test points: Ignition circuit terminal 30 & Ground
    • If 9 V or less 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Test for infinite resistance between the test points: Ignition circuit terminal 30 & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 ohms between the test points: Ignition circuit terminal 30 @ Component harness & F47UA Fuse @ X50A Fuse Block - Underhood
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: KR75 Engine Controls Ignition Relay
    • Go to next step: If greater than 9 V 
  6. Replace the component: K115 Reductant Control Module
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