DTC : U0126-00 (Multipurpose Camera Unit: 9-Speed A/T) (2016 2017 2018)

DTC U0126-00  : Lost Communication With The Steering Angle Sensor

NOTE:  Before you troubleshoot, review the general troubleshooting information - Go to: How to Troubleshoot the Adaptive Cruise Control (ACC) (2016 2017 2018) .

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   Clear DTCs

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

   - 4. Turn the vehicle to the ON mode, then wait for at least 5 seconds.

   - 5. Check for DTCs with the HDS.

   Is DTC U0126-00 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Go to intermittent failures troubleshooting - Refer to: How to Troubleshoot the Adaptive Cruise Control (ACC) (2016 2017 2018) . 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_L, F-CAN A_H lines)

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

   - 2. Disconnect the following connectors.

   Multipurpose camera unit 20P connector

   Steering angle sensor 4P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Multipurpose camera unit 20P connector: disconnected
   	Steering angle sensor 4P connector: disconnected
   Test point 1	Multipurpose camera unit 20P connector No. 13 - Refer to: Multipurpose Camera Unit Connector for Inputs and Outputs (20106 2017 2018)
   Test point 2	Steering angle sensor 4P connector No. 3

   Test point 1	Multipurpose camera unit 20P connector No. 2 - Refer to: Multipurpose Camera Unit Connector for Inputs and Outputs (20106 2017 2018)
   Test point 2	Steering angle sensor 4P connector No. 2

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

   Is there continuity?

   YES 

   The F-CAN A_L, F-CAN A_H wires are OK. Go to step 3.

   NO 

   Repair an open in the wire between the multipurpose camera unit and the steering angle sensor.

3. Steering angle sensor check (substitution)

   - 1. Substitute a known-good Steering Angle Sensor .

   - 2. Turn the vehicle to the ON mode.

   - 3. Clear the DTC with the HDS.

   Clear DTCs

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

   - 5. Turn the vehicle to the ON mode, then wait for at least 5 seconds.

   - 6. Check for DTCs with the HDS.

   Is DTC U0126-00 indicated?

   YES 

   Go to step 4.

   NO 

   Replace the Steering Angle Sensor .

4. Multipurpose camera unit check (substitution)

   - 1. Substitute a known-good Multipurpose Camera Unit .

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

   - 3. Turn the vehicle to the ON mode, then wait for at least 5 seconds.

   - 4. Check for DTCs with the HDS.

   Is DTC U0126-00 indicated?

   YES 

   Check for loose terminals and poor connections in the multipurpose camera unit 20P connector. If they are OK, replace the Multipurpose Camera Unit .

   NO 

   Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTC's troubleshooting.