DTC U0126 (A/T System (Without CAN Gateway)) (2016 2017 2018 2019 2020)

DTC U0126  : Lost Communication With Steering Angle Sensor

DTC (A/T)

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Turn the vehicle to the OFF (LOCK) mode.

   - 4. Turn the vehicle to the ON mode.

   - 5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   U0126 Lost Communication With Steering Angle Sensor

   Is DTC U0126 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between the steering angle sensor and the TCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Open wire check (F-CAN A_H line)

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connectors.

   Steering angle sensor 4P connector

   TCM 58P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Steering angle sensor 4P connector: disconnected
   	TCM 58P connector: disconnected
   Test point 1	Steering angle sensor 4P connector No. 2
   Test point 2	TCM 58P connector No. 34

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The F-CAN A_H wire is OK. Go to step 3.

   NO 

   Repair an open in the F-CAN A_H wire between the steering angle sensor and the TCM.

3. Open wire check (F-CAN A_L line)

   - 1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Steering angle sensor 4P connector: disconnected
   	TCM 58P connector: disconnected
   Test point 1	Steering angle sensor 4P connector No. 3
   Test point 2	TCM 58P connector No. 47

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The F-CAN A_L wire is OK. Substitute a known-good steering angle sensor , then recheck. If this DTC goes away and the steering angle sensor was substituted, replace the original steering angle sensor .

   NO 

   Repair an open in the F-CAN A_L wire between the steering angle sensor and the TCM.