DTC U0126-00: F-CAN Malfunction (EPS Control Unit-Steering Angle Sensor) (KA/KC models)

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTC (EPS)

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, then to the ON mode.

   - 4. Wait 60 seconds or more.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U0126-00 F-CAN Malfunction (EPS Control Unit-Steering Angle Sensor)

   Is DTC U0126-00 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. 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_H, F-CAN_L lines):

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

   - 2. Disconnect the following connectors.

   EPS control unit connector B (6P)

   Steering angle sensor 4P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	EPS control unit connector B (6P): disconnected
   	Steering angle sensor 4P connector: disconnected
   Test point 1	EPS control unit connector B (6P) No. 4
   Test point 2	Steering angle sensor 4P connector No. 2

   Test point 1	EPS control unit connector B (6P) No. 3
   Test point 2	Steering angle sensor 4P connector No. 3

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

   Is there continuity?

   YES 

   The F-CAN_H and F-CAN_L wires are OK. Go to step 3.

   NO 

   Repair an open in the wire between the EPS control unit and the steering angle sensor.

3. Open wire check (IG1 VSA/ABS line):

   - 1. Turn the vehicle to the ON mode.

   - 2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	EPS control unit connector B (6P): disconnected
   	Steering angle sensor 4P connector: disconnected
   Test point 1	Steering angle sensor 4P connector No. 1
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The IG1 VSA/ABS wire is OK. Go to step 4.

   NO 

   Repair an open in the wire between the No. C27 (7.5 A) fuse in the under-dash fuse/relay box and the steering angle sensor.

4. Open wire check (GND line):

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

   - 2. Reconnect the following connectors.

   EPS control unit connector B (6P)

   Steering angle sensor 4P connector

   - 3. Turn the vehicle to the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   Test point 1	Steering angle sensor 4P connector No. 4
   Test point 2	Body ground

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

   Is there 0.1 V or less?

   YES 

   Replace the steering angle sensor .

   NO 

   Repair an open in the wire between the steering angle sensor and body ground (G401).