DTC U0100-00 (41-01), U0101-00 (41-04), U0122-00 (41-02), U0126-00 (41-06) (AWD, Without Multipurpose Camera Unit)

DTC U0100-00  : F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))DTC U0101-00  : F-CAN Malfunction (Lost Communication with A/T Control System)DTC U0122-00  : F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)DTC U0126-00  : F-CAN Malfunction (Lost Communication with Steering Angle Sensor)

NOTE:  Before you troubleshoot, review the General Troubleshooting Information for the AWD with intelligent control system .

DTC (AWD)

1. Problem verification (DTC check)

   -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. Start the engine.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U0100-00 F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
   U0101-00 F-CAN Malfunction (Lost Communication with A/T Control System)
   U0122-00 F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
   U0126-00 F-CAN Malfunction (Lost Communication with Steering Angle Sensor)

   Is DTC U0100-00, U0101-00, U0122-00, or U0126-00 indicated?

   DTC U0100-00 or U0101-00 is indicated

   The failure is duplicated. Go to step 2.

   DTC U0122-00 is indicate

   The failure is duplicated. Go to step 3.

   DTC U0126-00 is indicated

   The failure is duplicated. Go to step 4.

   DTC is not indicated

   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

   -1. Turn the vehicle to the OFF (LOCK) mode, and wait 2 minutes.

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connectors.

   AWD control unit 24P connector

   PCM connector A (51P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	AWD control unit 24P connector: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	AWD control unit 24P connector No. 14
   Test point 2	PCM connector A (51P) No. 3

   Test point 1	AWD control unit 24P connector No. 24
   Test point 2	PCM connector A (51P) No. 4

   Is there continuity?

   YES 

   Update the PCM if it does not have the latest software , or substitute a known-good PCM , and recheck. If the symptom/indication goes away with the updated PCM, troubleshooting is complete. If the symptom/indication goes away with a known-good PCM, replace the original PCM .

   NO 

   Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the PCM.

3. Open wire check (F-CAN_H, F-CAN_L lines)2

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

   -2. Disconnect the following connectors.

   AWD control unit 24P connector

   VSA modulator-control unit 21P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	AWD control unit 24P connector: disconnected
   	VSA modulator-control unit 21P connector: disconnected
   Test point 1	AWD control unit 24P connector No. 14
   Test point 2	VSA modulator-control unit 21P connector No. 8

   Test point 1	AWD control unit 24P connector No. 24
   Test point 2	VSA modulator-control unit 21P connector No. 15

   Is there continuity?

   YES 

   Update the VSA modulator-control unit if it does not have the latest software , and recheck. If the symptom/indication goes away with the updated VSA modulator-control unit, troubleshooting is complete. If the symptom/indication does not goes away with the updated the VSA modulator-control unit, replace the VSA modulator-control unit .

   NO 

   Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the VSA modulator-control unit.

4. Open wire check (F-CAN_H, F-CAN_L lines)3

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

   -2. Disconnect the following connectors.

   AWD control unit 24P connector

   Steering angle sensor 4P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	AWD control unit 24P connector: disconnected
   	Steering angle sensor 4P connector
   Test point 1	AWD control unit 24P connector No. 14
   Test point 2	Steering angle sensor 4P connector No. 2

   Test point 1	AWD control unit 24P connector No. 24
   Test point 2	Steering angle sensor 4P connector No. 3

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

   Is there continuity?

   YES 

   Replace the steering angle sensor .

   NO 

   Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the steering angle sensor.