Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001H795
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): U012687,U012987,U023A87,U029387; Lost Communication with Steering Angle Sensor Module Missing Message; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

DTC

U012987

Lost Communication with Brake System Control Module Missing Message

DTC

U023A87

Lost Communication with Image Processing Module "A" Missing Message

DTC

U029387

Lost Communication with Hybrid/EV Powertrain Control Module Missing Message

DESCRIPTION

The power steering ECU with motor assembly receives signals from the steering sensor, skid control ECU (brake booster with master cylinder assembly), forward recognition camera (w/ Forward Recognition Camera) and hybrid vehicle control ECU via CAN communication.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

Lost communication with steering sensor
  • CAN communication system
  • Steering sensor

EPS warning light: Does not come on

After normal confirmation

-

U012987

Lost Communication with Brake System Control Module Missing Message

Lost communication with skid control ECU (brake booster with master cylinder assembly)
  • CAN communication system
  • Skid control ECU (Brake booster with master cylinder assembly)

EPS warning light: Does not come on

After normal confirmation

-

U023A87

Lost Communication with Image Processing Module "A" Missing Message

Lost communication with forward recognition camera
  • CAN communication system
  • Forward recognition camera

EPS warning light: Does not come on

After normal confirmation

w/ Forward Recognition Camera

U029387

Lost Communication with Hybrid/EV Powertrain Control Module Missing Message

Lost communication with hybrid vehicle control ECU
  • CAN communication system
  • Hybrid vehicle control ECU

EPS warning light: Does not come on

After normal confirmation

-

PROCEDURE

1.

GO TO CAN COMMUNICATION SYSTEM

(a) Go to CAN communication system.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

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END