LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P0685-P0687, P0689, P0690, P1682, P16A7, P16AF, or P16B3 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

  1. Ignition/Vehicle - Off
  2. Remove the component: KR75 Engine Controls Ignition Relay
  3. Test for 70 to 110 ohms between the test points: Component terminal 1 & 2
    • If not between 70 and 110 ohms 

      Replace the component: KR75 Engine Controls Ignition Relay

    • Go to next step: If between 70 and 110 ohms 
  4. Test for infinite resistance between the test points:
    • Component terminal 30 & 86
    • Component terminal 30 & 87
    • Component terminal 30 & 85
    • Component terminal 85 & 87
    • If less than infinite resistance 

      Replace the component: KR75 Engine Controls Ignition Relay

    • Go to next step: If infinite resistance 
  5. Connect a 3 A fused jumper wire between the test points: Component terminal 85 & B+

    Connect a jumper wire between the test points: Component terminal 85 & Ground

  6. Test for less than 2 ohms between the test points: Component terminal 30 & 87
    • If 2 ohms or greater 

      Replace the component: KR75 Engine Controls Ignition Relay

    • Go to next step: If less than 2 ohms 
  7. All OK.
scientia non olet · About LEMON Manuals