How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
The intelligent tester can be used in steps 3, 4, 6, 8, 10 and 11.
- VEHICLE BROUGHT TO WORKSHOP
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- CUSTOMER PROBLEM ANALYSIS
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- Confirm problem symptoms (See HOW TO PROCEED WITH TROUBLESHOOTING ).
- CHECK MULTIPLEX COMMUNICATION SYSTEM
- Check for DTC outputs.
DTC IS OUTPUT: CHECK MULTIPLEX COMMUNICATION CIRCUIT
DTC IS NOT OUTPUT: Go to step 4
- CHECK CAN COMMUNICATION SYSTEM
- Check for DTC outputs.
DTC IS OUTPUT: CHECK CAN COMMUNICATION CIRCUIT
DTC IS NOT OUTPUT: Go to step 5
- CHECK WARNING LIGHT
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- CHECK DTC (Present and Past DTCs)
DTC IS OUTPUT (INCLUDING NORMAL SYSTEM CODE): Go to step 7
DTC IS NOT OUTPUT: PROBLEM SYMPTOMS TABLE
- DTC CHART
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- CIRCUIT INSPECTION
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- REPAIR
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- CLEAR DTC (Present and Past DTCs)
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- CHECK DTC (Present and Past DTCs)
DTC IS NOT OUTPUT: Go to step 12
DTC IS OUTPUT: Go to step 7
- CONFIRMATION TEST
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