Problem Symptoms Table [08/2016 - 08/2017]
WARNING: This page is about a different car, the 2018 Toyota Corolla, 2017 Toyota Corolla, 2016 Toyota Corolla, 2015 Toyota Corolla, and 2014 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.
- Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
POWER STEERING SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| Heavy steering | Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION [08/2013 - 08/2017] |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT [08/2016 - 08/2017] | |
| Electric power steering column sub-assembly | Refer to REMOVAL [08/2016 - 08/2017] | |
| Torque sensor (Electric power steering column sub-assembly) | - | |
| Power steering motor assembly | - | |
| Speed sensor circuit | Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2016 - ] | |
| Battery and power source system | - | |
| Power steering ECU assembly power source voltage and relay | Refer to TERMINALS OF ECU [08/2014 - ] | |
| Power steering ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| CAN communication system (w/ Central Gateway ECU) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| CAN communication system (w/o Central Gateway ECU) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] | |
| Steering effort differs between turning right and left, or steering effort is uneven | Front tires (improperly inflated, unevenly worn) | Refer to INSPECTION [08/2013 - 08/2017] |
| Front wheel alignment (incorrect) | Refer to ADJUSTMENT [08/2016 - 08/2017] | |
| Steering gear assembly | Refer to INSPECTION [08/2014 - ] | |
| Torque sensor (Electric power steering column sub-assembly) | - | |
| Electric power steering column sub-assembly | Refer to REMOVAL [08/2016 - 08/2017] | |
| Power steering motor assembly | - | |
| Power steering ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| While driving, steering effort does not change in accordance with vehicle speed or the steering wheel does not return properly | Speed sensor circuit | Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2016 - ] |
| Torque sensor (Electric power steering column sub-assembly) | - | |
| Power steering motor assembly | - | |
| Power steering ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| CAN communication system (w/ Central Gateway ECU) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| CAN communication system (w/o Central Gateway ECU) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] | |
| A knocking (or clunking) sound occurs when turning the steering wheel back and forth while power steering is operating | Steering intermediate shaft | - |
| Power steering ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| Noise occurs when turning the steering wheel during low-speed driving | Steering gear assembly | Refer to INSPECTION [08/2014 - ] |
| Electric power steering column sub-assembly | Refer to REMOVAL [08/2016 - 08/2017] | |
| Friction occurs when turning the steering wheel during low-speed driving | Power steering motor assembly | - |
| Electric power steering column sub-assembly | Refer to REMOVAL [08/2016 - 08/2017] | |
| A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped | Power steering motor assembly | - |
| The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped | Steering gear assembly | Refer to INSPECTION [08/2014 - ] |
| Electric power steering column sub-assembly | Refer to REMOVAL [08/2016 - 08/2017] | |
| DTCs cannot be output (terminals TC and CG of the DLC3 are connected) | TC and CG terminal circuit | Refer to TC and CG Terminal Circuit [08/2016 - ] |
| IG power source circuit | Refer to DTC C1551: IG Power Supply Voltage [08/2013 - ] | |
| Combination meter assembly | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| Signal check cannot be performed (terminals TS and CG of the DLC3 are connected) | TS and CG terminal circuit | Refer to TS and CG Terminal Circuit [08/2013 - ] |
| Power steering ECU assembly | Refer to REMOVAL [08/2013 - ] | |
| EPS warning light remains on | EPS warning light circuit | Refer to EPS Warning Light Circuit [08/2016 - ] |