Circuit/System Verification
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.
- Ignition ON/Vehicle in Service Mode.
- Verify that the appropriate devices controlled by the KR76A Retained Accessory Power Relay 1 and KR76B Retained Accessory Power Relay 2 turn ON and OFF when switching the ignition between ON/Vehicle in Service Mode and OFF/Vehicle OFF.
- If the devices do not turn ON and OFF
Refer to Circuit/System Testing - Diagnostic A
- If the devices turn ON and OFF
- If the devices do not turn ON and OFF
- Verify that the appropriate devices controlled by the K9 Body Control Module's circuit terminal 12 X4 turn ON and OFF when commanding the Accessory/Retained Accessory Power Relay On and Off with a scan tool.
- If the devices do not turn ON and OFF
Refer to Circuit/System Testing - Diagnostic B.
- If the devices turn ON and OFF
- If the devices do not turn ON and OFF
- All OK.
NOTE:
Use schematics to determine which devices are on the K9 Body Control Module's ignition circuit terminal 12 X4 or controlled by the KR76 Retained Accessory Power Relay. Use the connector end view to identify the ignition circuit terminal for each of those devices.