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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 309 (Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B147E or B147F: Battery Saver Relay Set Secondary Circuit/Battery Saver Relay Reset Secondary Circuit >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostic A

  1. Verify a test lamp illuminates between Fuse F5DA and ground.
    • If the test lamp does not illuminate 

      Replace the X51A Fuse Block - Instrument Panel

    • If the test lamp illuminates 
  2. Ignition ON/Vehicle in Service Mode.
  3. Disconnect the X4 harness connector at the K9 Body Control Module.
  4. Test for less than 1 V between the control circuit terminal 9 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  5. Connect a 3 A fused jumper wire between the K9 Body Control Module control circuit terminal 9 and B+.
  6. Verify a test lamp illuminates between the X51A Fuse Block - Instrument Panel test point TP3 and ground.
    • If the test lamp does not illuminate 
    1. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    2. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the X51A Fuse Block - Instrument Panel.
    • If the test lamp illuminates 
  7. Connect the X4 harness connector at the K9 Body Control Module.
  8. Disconnect the X7 harness connector at the K9 Body Control Module.
  9. Ignition ON/Vehicle in Service Mode.
  10. Test for less than 1 V between the control circuit terminal 16 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  11. Connect a 3 A fused jumper wire between the control circuit terminal 16 and B+.
  12. Verify a test lamp does not illuminate between the X51A Fuse Block - Instrument Panel test point TP3 and ground.
    • If the test lamp illuminates 
    1. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    2. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the X51A Fuse Block - Instrument Panel.
    • If the test lamp does not illuminate 
  13. Ignition OFF/Vehicle OFF, connect the harness connector at the K9 Body Control Module.
  14. Ignition ON/Vehicle in Service Mode.
  15. Verify a test lamp illuminates between the X51A Fuse Block - Instrument Panel test point TP3 and ground.
    • If the test lamp does not illuminate 

      Replace the K9 Body Control Module.

    • If the test lamp illuminates 
  16. Disconnect the harness connector at the appropriate device controlled by the KR104A Battery Saver Relay 1.
    17. NOTE:

    The vehicle may not be equipped with all components as listed below. Use schematics to determine which components are supplied their B+ feed by the KR104A Battery Saver Relay 1. Use the connector end view to identify the B+ circuit terminal for each of those components.

  17. Ignition OFF/Vehicle OFF. It may take up to 1 min after the ignition is switched OFF and retained accessory power is disabled before the K9 Body Control Module sends a command to unlatch the relay.
  18. Verify that a test lamp does not illuminate between the B+ circuits listed below and ground.
    • P16 Instrument Cluster - B+ circuit terminal 7 X1
    • X83 Auxiliary Audio Input - B+ circuit 6 X1
    • K73 Telematics Communication Interface Control Module - B+ circuit terminal 15 X1
    • P17 Info Display Module - B+ circuit terminal 1 X1
    • P17 Info Display Module - B+ circuit terminal 1 X2
    • A11 Radio - B+ circuit terminal 8 X3
    • A11 Radio - B+ circuit terminal 11 X1
    • A11 Radio - B+ circuit terminal 20 X2
    • K74 Human Interface Control Module - B+ circuit terminal 7 X1
    • If the test lamp illuminates 

      Repair the short to voltage on the B+ circuit.

    • If the test lamp does not illuminate 
  19. Ignition ON/Vehicle in Service Mode.
  20. Verify that a test lamp illuminates between each of the B+ circuits listed below and ground.
    • P16 Instrument Cluster - B+ circuit terminal 7 X1
    • X83 Auxiliary Audio Input - B+ circuit 6 X1
    • K73 Telematics Communication Interface Control Module - B+ circuit terminal 15 X1
    • P17 Info Display Module - B+ circuit terminal 1 X1
    • P17 Info Display Module - B+ circuit terminal 1 X2
    • A11 Radio - B+ circuit terminal 8 X3
    • A11 Radio - B+ circuit terminal 11 X1
    • A11 Radio - B+ circuit terminal 20 X2
    • K74 Human Interface Control Module - B+ circuit terminal 7 X1
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF/Vehicle OFF, remove the test lamp.
    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, replace the X51A Fuse Block - Instrument Panel.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF/Vehicle 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, test or replace the appropriate device that is controlled by the KR104A Battery Saver Relay 1..
    • If the test lamp illuminates 
  21. Test or replace the appropriate device that is controlled by the KR104A Battery Saver Relay 1.

Diagnostic B

  1. Disconnect the X4 harness connector at the K9 Body Control Module.
  2. Test for less than 1 V between the control circuit terminal 9 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  3. Connect a 3 A fused jumper wire between the K9 Body Control Module control circuit terminal 9 and B+.
  4. Verify a test lamp illuminates between the fuses listed below and ground.
    • X53A Fuse Block - Rear Body - Fuse F52RA
    • X53A Fuse Block - Rear Body - Fuse F53RA
    • X53A Fuse Block - Rear Body - Fuse F54RA
    • X53A Fuse Block - Rear Body - Fuse F56RA
    • X53A Fuse Block - Rear Body - Fuse F57RA
    • If the test lamp does not illuminate 
    1. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    2. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the X51A Fuse Block - Instrument Panel.
    • If the test lamp illuminates 
  5. Connect the X4 harness connector at the K9 Body Control Module.
  6. Disconnect the X7 harness connector at the K9 Body Control Module.
  7. Ignition ON/Vehicle in Service Mode.
  8. Test for less than 1 V between the control circuit terminal 16 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  9. Connect a 3 A fused jumper wire between the control circuit terminal 16 and B+.
  10. Verify a test lamp does not illuminate between the fuses listed below and ground.
    • X53A Fuse Block - Rear Body - Fuse F52RA
    • X53A Fuse Block - Rear Body - Fuse F53RA
    • X53A Fuse Block - Rear Body - Fuse F54RA
    • X53A Fuse Block - Rear Body - Fuse F56RA
    • X53A Fuse Block - Rear Body - Fuse F57RA
    • If the test lamp illuminates 
    1. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    2. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the X53A Fuse Block - Rear Body.
    • If the test lamp does not illuminate 
  11. Ignition OFF/Vehicle OFF, connect the harness connector at the K9 Body Control Module.
  12. Ignition ON/Vehicle in Service Mode.
  13. Verify a test lamp illuminates between the fuses listed below and ground.
    • X53A Fuse Block - Rear Body - Fuse F52RA
    • X53A Fuse Block - Rear Body - Fuse F53RA
    • X53A Fuse Block - Rear Body - Fuse F54RA
    • X53A Fuse Block - Rear Body - Fuse F56RA
    • X53A Fuse Block - Rear Body - Fuse F57RA
    • If the test lamp does not illuminate 

      Replace the K9 Body Control Module.

    • If the test lamp illuminates 
  14. Disconnect the harness connector at the appropriate device controlled by the KR104B Battery Saver Relay 2.
    15. NOTE:

    The vehicle may not be equipped with all components as listed below. Use schematics to determine which components are supplied their B+ feed by the KR104B Battery Saver Relay 2. Use the connector end view to identify the B+ circuit terminal for each of those components.

  15. Ignition OFF/Vehicle OFF. It may take up to 1 min after the ignition is switched OFF and retained accessory power is disabled before the K9 Body Control Module sends a command to unlatch the relay.
  16. Verify that a test lamp does not illuminate between the B+ circuits listed below and ground.
    • K19 Suspension Control Module - B+ circuit terminal 1
    • K47 Rear Differential Clutch Control Module - B+ circuit terminal 10 X1
    • K157 Video Processing Control Module - B+ circuit terminal 1 X2
    • K182 Parking Assist Module - B+ circuit terminal 1 X1
    • B218L Side Object Sensor Module - Left - B+ circuit terminal 8
    • B218R Side Object Sensor Module - Right - B+ circuit terminal 8
    • K171 Hands-Free Liftgate Sensor Control Module - B+ circuit terminal 2 X1
    • B174W Frontview Camera - Windshield - B+ circuit terminal 3
    • K124 Active Safety Control Module - Windshield - B+ circuit terminal 1 X1
    • B233B Radar Sensor Module - Long Range - B+ circuit terminal 1
    • S25 Garage Door Opener - B+ circuit terminal 1
    • S48B Multifunction Switch - Overhead Console - B+ circuit terminal 1
    • If the test lamp illuminates 

      Repair the short to voltage on the B+ circuit.

    • If the test lamp does not illuminate 
  17. Ignition ON/Vehicle in Service Mode.
  18. Verify that a test lamp illuminates between each of the B+ circuits listed below and ground.
    • K19 Suspension Control Module - B+ circuit terminal 1
    • K47 Rear Differential Clutch Control Module - B+ circuit terminal 10 X1
    • K157 Video Processing Control Module - B+ circuit terminal 1 X2
    • K182 Parking Assist Module - B+ circuit terminal 1 X1
    • B218L Side Object Sensor Module - Left - B+ circuit terminal 8
    • B218R Side Object Sensor Module - Right - B+ circuit terminal 8
    • K171 Hands-Free Liftgate Sensor Control Module - B+ circuit terminal 2 X1
    • B174W Frontview Camera - Windshield - B+ circuit terminal 3
    • K124 Active Safety Control Module - Windshield - B+ circuit terminal 1 X1
    • B233B Radar Sensor Module - Long Range - B+ circuit terminal 1
    • S25 Garage Door Opener - B+ circuit terminal 1
    • S48B Multifunction Switch - Overhead Console - B+ circuit terminal 1
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF/Vehicle OFF, remove the test lamp.
    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, replace the X53A Fuse Block - Rear Body.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF/Vehicle 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, test or replace the appropriate device that is controlled by the KR104B Battery Saver Relay 2.
    • If the test lamp illuminates 
  19. Test or replace the appropriate device that is controlled by the KR104B Battery Saver Relay 2.
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