Sable AWD V6-3.5L (2008)
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1 (80A)
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2 (80A)
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33 (20A)
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Smart junction box (SJB) fuse 5 (10A)
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Wiring, terminals or connectors
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SJB
3. If an obvious cause of an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. NOTE: Make sure to use the latest scan tool software release.
If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
5. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
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Check the VCM connection to the vehicle.
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Check the scan tool connection to the VCM.
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Refer to Information Bus (Module Communications Network), No Power To The Scan Tool, to diagnose no communication with the scan tool.
6. If the scan tool does not communicate with the vehicle:
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Verify the ignition key is in the ON position.
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Verify the scan tool operation with a known good vehicle.
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Refer to Information Bus (Module Communications Network) to diagnose no response from the PCM.
7. Carry out the network test.
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If the scan tool responds with no communication for one or more modules, refer to Information Bus (Module Communications Network).
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If the network test passes, retrieve and record the continuous memory DTCs.
8. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
9. If the DTCs retrieved are related to the concern, go to DTC Charts. For all other DTCs, refer to Diagnostic Trouble Code (DTC) Chart. See:
Diagnostic Trouble Code Descriptions See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) Chart
10. If no DTCs related to the concern are retrieved, GO to Symptom Chart. See: Symptom Related Diagnostic Procedures/Smart Junction Box (SJB)
Principles of Operation
PRINCIPLES OF OPERATION
NOTE:
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The time out for the battery saver relay and the accessory delay relay (both are controlled by the SJB) is 1 minute if the vehicle has less than 80
km (50 miles). Once the vehicle passes the approximate mileage threshold of 80 km (50 miles), the time out for both relays will be the normal 10
minute time out, as described by the Owner's Literature. For the battery saver relay, refer to Lighting and Horns. For the accessory delay relay,
refer to Windows.
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The smart junction box (SJB) is also known as the generic electronic module (GEM).
The SJB is a multifunction module that controls many of the vehicle systems. Most of the SJB functions utilize hardwired inputs and/or outputs. The SJB
controls the following hardwired functions, using the corresponding inputs and outputs:
