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
HINT:
The hand-held tester can be used in steps 3, 4, 5 and 7.
- VEHICLE BROUGHT TO WORKSHOP
- See CUSTOMER PROBLEM ANALYSIS CHECK
)
- Confirm problem symptoms.
- CHECK MULTIPLEX COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING
)
- Check for DTCs.
DTC OUTPUT RESULT TABLEDTC is not output. A DTC is output. B B: GO TO MULTIPLEX COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
A: Go to next step
- CHECK CAN COMMUNICATION SYSTEM (See PRECAUTION
)
- Check for DTCs.
DTC OUTPUT RESULT TABLEMalfunction is not detected. A Malfunction is detected. B B: GO TO CAN COMMUNICATION SYSTEM (See PRECAUTION )
A: Go to next step
- CHECK DTC (See DTC CHECK/CLEAR
)
- Check for DTCs.
- Record the DTCs.
- Clear the DTCs.
- Recheck for DTCs.
- Simulate the malfunction and check if the DTCs are output again (see DTC CHECK/CLEAR ).
DTC OUTPUT RESULT TABLEDTC is output. A DTC is not output. B DTCs are not output, and the malfunction can not be simulated or checked. C B: Go to step 10
C: SYMPTOM SIMULATION (See HOW TO PROCEED WITH TROUBLESHOOTING )
A: Go to next step
- Check for DTCs.
- DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )
- CIRCUIT INSPECTION (See DTC B2000 RIGHT SIDE MOTOR LINE MALFUNCTION HI TO DTC B2064 VEHICLE TYPE SIGNAL MALFUNCTION )
- REPAIR
- CONFIRMATION TEST
END
- See PROBLEM SYMPTOMS TABLE )
- ADJUST, REPAIR OR REPLACE
- CONFIRMATION TEST
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.
