SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2025HIGHLANDER XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGMANUAL STEERINGPOWER STEERING SYSTEM - DIAGNOSTICS - INTRODUCTIONPOWER STEERING SYSTEMHOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023]PROCEDURE
2025 Toyota Highlander XLE, FWD

How To Proceed With Troubleshooting [12/2019 - 11/2023]: Procedure

2025 Toyota Highlander XLE, FWDSECTION Procedure
  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. INSPECT AUXILIARY BATTERY 
    1. Turn the ignition switch off.
    2. Measure the voltage of the auxiliary battery.

      Standard Voltage

      11 to 14 V

      HINT: 

      If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK DTC AND FREEZE FRAME DATA* 

    HINT: 

    Refer to DTC Check / Clear.

    Chassis > EMPS > Trouble Codes 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. PROBLEM SYMPTOM CONFIRMATION 

    Result

    Result Proceed to
    Symptom does not occur. A
    Symptom occurs. B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. SYMPTOM SIMULATION 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  6

  6. CHECK CAN COMMUNICATION SYSTEM* 
    1. Check for DTCs.

      for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

      for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

      Result

      Result Proceed to
      CAN communication system DTCs are not output. A
      CAN communication system DTCs are output. B

      HINT: 

      • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
      • If communication to the rack and pinion power steering gear assembly cannot be established through the GTS, inspect terminals CANH and CANL of the DLC3 and the rack and pinion power steering gear assembly, and the IG circuit of the rack and pinion power steering gear assembly.

    Result: 

    B 

    PROCEED TO CAN COMMUNICATION SYSTEM 

    for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

    for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

    Result: 

    A 

    See step  7

  7. CHECK FOR DTC* 
    1. Check for DTCs.

      Chassis > EMPS > Trouble Codes 

      HINT: 

      Refer to Diagnostic Trouble Code Chart when any DTCs are output.

      Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 11/2023] 

      Result

      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  8

  8. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table.

      Refer to PROBLEM SYMPTOMS TABLE [12/2019 - 11/2023] 

      Result

      Result Proceed to
      Fault is not listed in Problem Symptoms Table. A
      Fault is listed in Problem Symptoms Table. B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  9

  9. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Refer to Terminals of ECU.

      Refer to TERMINALS OF ECU [12/2019 - ] 

    2. Refer to Data List / Active Test.

      Refer to DATA LIST / ACTIVE TEST [12/2019 - 11/2023] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

  10. REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  11

  11. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END 

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

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.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.