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.
DTC Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC "C1A15-62" is displayed with DTC "U1000-01", "C1A04-04" or "C1A04-29", first diagnose the DTC "U1000-01", "C1A04-04" or "C1A04-29".
Is applicable DTC detected?
>>
Perform diagnosis of applicable.
- U1000-01: Refer to DTC Description .
- C1A04-04: Refer to DTC Description .
- C1A04-29: Refer to DTC Description .
>>
GO TO 2.
- CHECK VEHICLE SPEED SIGNAL
CONSULT Check that "VHCL SPEED SE" operates normally in "DATA MONITOR" of "ICC/ADAS 2".
CAUTION:Be careful of the vehicle speed.
Is the inspection result normal?
>>
GO TO 3.
>>
GO TO 7.
- CHECK GEAR POSITION CAUTION:
Be careful of the vehicle speed.
Is the inspection result normal?
>>
GO TO 5.
>>
GO TO 4.
- CHECK GEAR POSITION SIGNAL
Is the inspection result normal?
>>
GO TO 5.
>>
GO TO 6.
- CHECK INPUT SPEED SENSOR SIGNAL
Is the inspection result normal?
>>
Replace the ADAS control unit 2. Refer to Removal and Installation .
>>
GO TO 6.
- CHECK TCM SELF-DIAGNOSIS RESULTS
- Perform "All DTC Reading".
- Check if any DTC is detected in "Self Diagnostic Result" of "TRANSMISSION".
Is any DTC detected?
>>
Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .
>>
Replace the ADAS control unit 2. Refer to Removal and Installation .
- CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS
- Perform "All DTC Reading".
- Check if any DTC is detected in "Self Diagnostic Result" of "ABS".
Is any DTC detected?
>>
Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC No. Index .
>>
Replace the ADAS control unit 2. Refer to Removal and Installation .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.