LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2019 >> Suburban 3500 HD LS >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel Trim And Console Trim >> Diagnostic Information and Procedures >> Instrument Panel Compartment Door Latch Release Malfunction >> Circuit/System Testing

Circuit/System Testing

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: M91 Instrument Panel Compartment Door Unlatch Actuator
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 2 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 2 & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Verify the fuse is not open: F8DR Fuse
    • If the fuse is open 
    1. Replace the component: F8DR Fuse
    2. Verify the fuse does not open.
      • If the fuse opens - Test or replace the component: X51R Fuse Block - Instrument Panel Right
      • If the fuse does not open, go to the next step.
    • Go to next step: If the fuse is not open 
  5. Ignition/Vehicle - Off
  6. Connect the electrical connector: M91 Instrument Panel Compartment Door Unlatch Actuator
  7. Disconnect the electrical connector: X2@X51R Fuse Block - Instrument Panel Right
  8. Ignition - On / Vehicle - In Service Mode
  9. Momentarily connect a 10 A fused jumper wire between the test points: Control circuit terminal 19 & B+

    Verify the component turns On and Off when connecting and disconnecting the jumper wire: M91 Instrument Panel Compartment Door Unlatch Actuator

    • If the component does not turn On and Off 
    1. Ignition/Vehicle - Off & Remove - Jumper wire (s)
    2. Disconnect the electrical connector: M91 Instrument Panel Compartment Door Unlatch Actuator
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Control circuit terminal 1@Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for infinite resistance between the test points: Control circuit terminal 1@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    7. Test for less than 2 ohms between the test points: Control circuit terminal 1@Component harness & Control circuit terminal 19@Fuse Block Harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Test or replace the component: M91 Instrument Panel Compartment Door Unlatch Actuator
    • Go to next step: If the component turns On and Off 
  10. Ignition/Vehicle & All vehicle systems - Off
  11. Verify the fuse is not open: F8DR Fuse
    • If the fuse is open 

      Test or replace the component: X51R Fuse Block - Instrument Panel Right

    • Go to next step: If the fuse is not open 
  12. Test for less than 10 ohms between the test points: Ground circuit terminal 22 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 22 & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  13. Connect the electrical connector: X2@X51R Fuse Block - Instrument Panel Right
  14. Verify the fuse is not open: F11DL Fuse
    • If the fuse is open 

      Test or replace the component: K9 Body Control Module

    • Go to next step: If the fuse is not open 
  15. Disconnect the electrical connector: X1@K9 Body Control Module
  16. Ignition - On / Vehicle - In Service Mode
  17. Momentarily connect a 3 A fused jumper wire between the test points: Control circuit terminal 6 X1 & B+

    Verify the component turns On and Off when connecting and disconnecting the jumper wire: M91 Instrument Panel Compartment Door Unlatch Actuator

    • If the component does not turn On and Off 
    1. Ignition/Vehicle - Off & Remove - Jumper wire (s)
    2. Disconnect the electrical connector: X2@X51R Fuse Block - Instrument Panel Right
    3. Ignition/Vehicle - Off
    4. Test for infinite resistance between the test points: Control circuit terminal 6 X1@Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    5. Test for less than 2 ohms between the test points: Control circuit terminal 6 X1@Control module harness & Terminal 2 X2@Fuse Block Harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Test or replace the component: X51R Fuse Block - Instrument Panel Right
    • Go to next step: If the component turns On and Off 
    18. NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  18. Ignition/Vehicle & All vehicle systems - Off
  19. Disconnect the electrical connector: S48D Multifunction Switch 2 - Instrument Panel
  20. Test for less than 10 ohms between the test points: Ground circuit terminal 5 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 5@Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  21. Ignition - On / Vehicle - In Service Mode
  22. Momentarily connect a 3 A fused jumper wire between the test points: Signal circuit terminal 7 & Ground

    Verify the component turns On and Off when connecting and disconnecting the jumper wire: M91 Instrument Panel Compartment Door Unlatch Actuator

    • If the component does not turn On and Off 
    1. Ignition/Vehicle - Off & Remove - Jumper wire (s)
    2. Disconnect the electrical connector: K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 7@Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for infinite resistance between the test points: Signal circuit terminal 7@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    7. Test for less than 2 ohms between the test points: Signal circuit terminal 7@Component harness & Terminal 18 X2@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K9 Body Control Module
    • Go to next step: If the component turns On and Off 
  23. Test or replace the component: S48D Multifunction Switch 2 - Instrument Panel
scientia non olet · About LEMON Manuals