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
Use the intelligent tester at steps 3, 4, 6, 7, 8, 11, 14, and 17.
- VEHICLE BROUGHT TO WORKSHOP
- CUSTOMER PROBLEM ANALYSIS
- CHECK DTC AND FREEZE FRAME DATA
- CLEAR DTC AND FREEZE FRAME DATA
- PROBLEM SYMPTOM CONFIRMATION
- 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 the CAN communication, and the gateway ECU sends the signals to the combination meter via the 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
- PROBLEM SYMPTOM SIMULATION
SYMPTOM DOES NOT OCCUR: Go to step 10
SYMPTOM OCCURS: Go to step 11
- SYMPTOM SIMULATION
- 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
- PROBLEM SYMPTOMS TABLE
NEXT: Go to step 14
- DTC CHART
- CIRCUIT INSPECTION
- IDENTIFICATION OF PROBLEM
- REPAIR OR REPLACE
- CONFIRMATION TEST
NEXT: END
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.