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Circuit/System Verification

NOTE:

The vehicle may not be equipped with all components as listed below. Use schematics to determine which ignition relay supplies the ignition feed for the appropriate devices. Use the connector end view to identify the ignition circuit terminal for each of those devices. Opening and closing the door latches/ajar switches while leaving the doors open is recommended, this allows vehicle interior access that may be needed to complete the diagnostic steps.

  1. Ignition ON.
  2. Verify that the appropriate devices controlled by the KR73 Ignition Main Relay turn ON and OFF when commanding the Run/Crank Relay On and Off with a scan tool.
    • If the devices do not turn ON and OFF 

      Refer to Circuit/System Testing - Diagnostic A.

    • If the devices turn ON and OFF 
  3. Verify that the appropriate devices controlled by the KR75 Engine Controls Ignition Relay turn ON and OFF when commanding the Engine Controls Ignition 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 
  4. Verify that the appropriate devices controlled by the KR76A Retained Accessory Power Relay 1 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 C.

    • If the devices turn ON and OFF 
  5. Verify that the appropriate devices controlled by the KR76B Retained Accessory Power Relay 2 turn ON and OFF when cycling the ignition ON and OFF.
    • If the devices do not turn ON and OFF 

      Refer to Circuit/System Testing - Diagnostic D.

    • If the devices turn ON and OFF 
  6. Verify that the appropriate devices controlled by the KR74 Ignition Run Relay turn ON and OFF when cycling the ignition between ON and OFF.
    • If the devices do not turn ON and OFF 

      Refer to Circuit/System Testing - Diagnostic E.

    • If the devices turn ON and OFF 
  7. Verify that the appropriate devices controlled by the KR104A Battery Saver Relay 1 turn ON and OFF after enabling battery saver mode (transport mode).
    • If the devices do not turn ON and OFF 

      Refer to Circuit/System Testing - Diagnostic F.

    • If the devices turn ON and OFF 
  8. All OK.
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