B2300 L4-2.3L VIN D (2004)
Body Control Systems: Initial Inspection and Diagnostic Overview
Inspection and Verification
1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of electrical damage.
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. If the cause is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool
menu If the diagnostic tool does not communicate with the vehicle.
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check that the program card is correctly installed.
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check the connections to the vehicle.
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check the ignition switch position.
5. If diagnostic tool still does not communicate with the vehicle, see the diagnostic tool manual.
6. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with:
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SCP, ISO or CAN circuits fault, all electronic control units no response/not equipped. See Communications Network under Information Bus.
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No response/not equipped for SJB. See THE SMART JUNCTION BOX (SJB) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL.
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System passed, retrieve and record the continuous diagnostic trouble codes (DTCs) erase the continuous DTCs and carry out self-test
diagnostics for the SJB.
7. If the DTCs retrieved are related to the concern. See DTC INDEX & MDASH, SMART JUNCTION BOX (SJB). See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
8. If no DTCs related to the concern are retrieved. Go to the Symptom Chart. See: Symptom Related Diagnostic Procedures/Symptom Diagnostic
Index
