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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is symptom-to-system-to-component-tocomponent (SSCC) |
SSCC provides an organized, logical approach to diagnostics. |
Page 33 |
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What are the questions a service advisor should ask a customer |
1. When does the concern occur 2. How often does it occur 3. Under what operating conditions does it occur 4. How long does it last 5. Do external weather conditions-such as hot or cold temperatures, rain, snow, sitting overnight, or undergoing a hot soak- affect it? 6 Has any aftermarket accessories been installed on the vehicle? |
Page 33 |
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When gathering codes, it is important to note that |
A module not tested may have a fault present that affects the operation of another module not believed to be part of that system |
Page 34 |
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After receiving DTCs, |
View and record freeze-frame or failure records before clearing the codes |
Page 34 |
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When receiving multiple DTCs, |
Follow the manufacturer recommended service procedures. Faults that result in a code can cause other DTCs to set, making the correct order of repair vital. |
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When performing preliminary checks, SDS section Descriptions |
1.check for obvious problem: Corrosion, Leaks, Odors, Vibrations and Excessive movement. 2. Verify what does and does not work; failure in one system may affect another. 3. Inspect for signs of previous repairs and improper installation of parts. 4. Check and verify battery voltage and charging system voltage; modules are sensitive to voltage changes. 5. Verify oil, coolant and fuel levels. 6. Inspect for visible leaks
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What is a preliminary check |
Performing a thorough visual inspection, looking for corroded connections, wires, blown fuses, aftermarket accessories, leaks, and missing or improperly installed parts |
Page 34 |
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The technician and customer should be aware that the repair of a fault code might lead to additional DTCs setting later because |
On-board diagnostic (OBD II) operation can prevent one or more monitors from running with a stored DTC. Successfully repairing a code allows the powertrain control module (PCM) to run additional tests. If additional monitors do not run, because of a DTC, the PCM may not detect and store additional faults until the original DTC has been set. |
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What is a current DTC |
Also known as a hard fault, this condition is currently present and is typically the easiest to diagnose. Follow designated DTC diagnostic flow chart to ensure an efficient repair |
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What is an intermittent/history DTC |
This fault is often the most difficult to diagnose. It does not occur continuously, and it usually requires a particular set of parameters present to replicate it. |
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Intermittent faults are commonly a result of |
1. Electrical issues from connection and wiring 2. Radio frequency interference (RFI) 3. Malfunctioning components 4. Aftermarket accessories |
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The following are some of the tests that will help replicate concerns |
1. Perform wiggle testing on harness and connectors 2. Cycle components through complete temperature extremes 3. Road test the vehicle to induce shock and vibration 4. Apply moisture (with a spray bottle) to components and wiring
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When performing intermittent testing |
Install the scan tool and test drive the vehicle in record mode after selecting the parameter ID (PID) data that correspond to the fault. Record in graphing mode |
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Freeze frame and failure records |
Can aid in finding intermittent faults. When a DTC sets, the PCM stores freeze-frame records for the first DTC set. Failure records can store information for five codes. |
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The information provided by Freeze frame data includes operating conditions present when the fault occurs |
1. At what load 2. RPM 3. Operating temperature 4. Vehicle speed |
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Typically after resetting the (KAM) keep alive memory also known as adaptive memory |
The vehicle relearn adaptive strategies within 50 to 100 miles |
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