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 [12/2022 - ]: Procedure
- VEHICLE BROUGHT TO WORKSHOP
Result
Proceed to NEXT Result:
NEXT
See step 2
- INSPECT AUXILIARY BATTERY VOLTAGE
- Measure the auxiliary battery voltage with the ignition switch off.
Standard Voltage
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
Result
Proceed to NEXT
Result:
NEXT
See step 3
- Measure the auxiliary battery voltage with the ignition switch off.
- CHECK COMMUNICATION FUNCTION OF CXPI COMMUNICATION SYSTEM*
- Using the GTS, check the CXPI communication function to ensure that there are no malfunctions in the communication system.
Result
Result Proceed to No DTCs output A DTCs output B
Result:
B
GO TO CXPI COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2022 - 03/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2023 - ]
Result:
A
See step 4
- Using the GTS, check the CXPI communication function to ensure that there are no malfunctions in the communication system.
- CHECK VEHICLE CONTROL HISTORY (RoB)*
- Using the GTS, check for Vehicle Control History (RoB).
Body Electrical > Power Distribution Box > Utility
Tester Display Vehicle Control History (RoB) - If the vehicle control history is output, record it.
Result
Result Proceed to Vehicle Control History (RoB) is not output A Vehicle Control History (RoB) is output B
Result:
B
GO TO VEHICLE CONTROL HISTORY (ROB). Refer to VEHICLE CONTROL HISTORY [12/2022 - ]
Result:
A
See step 5
- Using the GTS, check for Vehicle Control History (RoB).
- CHECK FOR DTC*
- Check for DTCs and make a note of any codes that are output.
- Clear the DTCs.
Body Electrical > Power Distribution Box > Clear DTCs
- Recheck for DTCs.
Body Electrical > Power Distribution Box > Trouble Codes
Result
Result Proceed to No DTCs output A DTCs output B
Result:
B
GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2022 - ]
Result:
A
See step 6
- PROBLEM SYMPTOMS TABLE
- Refer to the Problem Symptoms Table.
Refer to PROBLEM SYMPTOMS TABLE [12/2022 - ]
Result
Proceed to Fault is not listed in problem symptoms table Fault is listed in problem symptoms table
Result:
Fault is listed in problem symptoms table
ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
Result:
Fault is not listed in problem symptoms table
See step 7
- Refer to the Problem Symptoms Table.
- OVERALL ANALYSIS AND TROUBLESHOOTING*
- Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [12/2022 - ]
- Terminals of ECU
Refer to TERMINALS OF ECU [12/2022 - ]
- Problem Symptoms Table
Refer to PROBLEM SYMPTOMS TABLE [12/2022 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 8
- Data List / Active Test
- ADJUST, REPAIR OR REPLACE
Result
Proceed to NEXT Result:
NEXT
END
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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.