Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
How To Proceed With Troubleshooting
The intelligent tester can be used at steps 3, 4, 6, 7, 8, 11, 14, and 17.
- VEHICLE BROUGHT TO WORKSHOP
NEXT
- CUSTOMER PROBLEM ANALYSIS
NEXT
- CHECK DTC AND FREEZE FRAME DATA
NEXT
- CLEAR DTC AND FREEZE FRAME DATA
NEXT
- PROBLEM SYMPTOM CONFIRMATION
NEXT
- CHECK CAN COMMUNICATION SYSTEM
- Check for output DTCs (See DIAGNOSIS SYSTEM
).
HINT:
The ECU of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.
CAN COMMUNICATION SYSTEM DTC IS OUTPUT: PROCEED TO CAN COMMUNICATION SYSTEM
NO CAN COMMUNICATION SYSTEM DTC IS OUTPUT: GO TO STEP 7
- Check for output DTCs (See DIAGNOSIS SYSTEM
).
- CHECK MULTIPLEX COMMUNICATION SYSTEM
- Check for output DTCs (See DTC CHECK / CLEAR
).
HINT:
The skid control ECU sends the signals of each warning light to the gateway ECU via CAN communication, and the gateway ECU sends the signals to the combination meter via multiplex communication system (BEAN).
MULTIPLEX COMMUNICATION SYSTEM DTC IS OUTPUT: PROCEED TO MULTIPLEX COMMUNICATION SYSTEM
NO MULTIPLEX COMMUNICATION SYSTEM DTC IS OUTPUT: GO TO STEP 8
- Check for output DTCs (See DTC CHECK / CLEAR
).
- DTC CHECK AND CLEAR
NEXT
- PROBLEM SYMPTOM SIMULATION
SYMPTOM DOES NOT OCCUR: GO TO STEP 10
SYMPTOM OCCURS: GO TO STEP 11
- SYMPTOM SIMULATION
NEXT
- DTC CHECK (OTHER THAN CAN AND MULTIPLEX COMMUNICATION SYSTEM DTC)
- Check for output DTCs (See DTC CHECK / CLEAR
).
NORMAL SYSTEM CODE: GO TO STEP 12
TROUBLE CODE: GO TO STEP 13
- Check for output DTCs (See DTC CHECK / CLEAR
).
- PROBLEM SYMPTOMS TABLE
NEXT: GO TO STEP 14
- DTC CHART
NEXT
- CIRCUIT INSPECTION
NEXT
- IDENTIFICATION OF PROBLEM
NEXT
- REPAIR OR REPLACE
NEXT
- CONFIRMATION TEST
NEXT: END
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.