DTC U0199: Keyless Access - P/W Communication Error (Keyless Access Control Unit)

DTC (Keyless Access Control Unit)

1. Problem verification

   - 1. Clear the DTCs with the HDS.

   - 2. Press the engine start/stop button to select the OFF mode and then the ON mode.

   - 3. Wait for at least 6 seconds.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   U0199 Keyless access - P/W COMMUNICATION ERROR

   Is DTC U0199 indicated?

   YES 

   Go to step 2 below.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Determine possible failure area (power window master switch power and ground, B CAN line)

   - 1. Select B-CAN CONTROL UNITS INFORMATION from the BODY ELECTRICAL SYSTEM SELECT menu, and then select CHECK CONNECTED CONTROL UNITS.

   - 2. Check the DETECT/NOT AVAILABLE information of the POWER WINDOW UNIT.

   Is DETECT indicated?

   YES 

   Go to step  7.

   NO 

   Go to step 3 below.

3. Fuse check

   - 1. Check the following fuses.

   Fuse	No. A21 (10 A)
   Location	Under-hood fuse/relay box

   Fuse	No. B1 (7.5 A)
   Location	Under-dash fuse/relay box

   Is each fuse OK?

   YES 

   Go to step 4 below.

   NO 

   Replace the fuse. If the fuse blows again, repair a short to ground in the No. A21 (10 A) and/or No. B1 (7.5 A) fuse circuit (s).

4. Open wire check (+B BACK UP line)

   - 1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Power window master switch 37P connector - Refer to: Power Window Master Switch Removal and Installation (4-door), or Power Window Master Switch Removal and Installation (2-door)

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

   Test condition	OFF mode
   	Power window master switch 37P connector: disconnected
   Test circuit	+B BACK UP
   Test point 1	Power window master switch 37P connector No. 26 (WHT)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The +B BACK UP wire is OK. Go to step 5 below.

   NO 

   Repair an open or high resistance in the wire.

5. Open wire check (IG2 line)

   - 1. Press the engine start/stop button to select the ON mode.

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

   Test condition	ON mode
   	Power window master switch 37P connector: disconnected
   Test circuit	IG2
   Test point 1	Power window master switch 37P connector No. 25 (LT GRN)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The IG2 wire is OK. Go to step 6 below.

   NO 

   Repair an open or high resistance in the wire.

6. Open wire check (GND lines)

   - 1. Press the engine start/stop button to select the OFF mode.

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

   Test condition	OFF mode
   	Power window master switch 37P connector: disconnected
   Test circuit	GND
   Test point 1	Power window master switch 37P connector No. 3 (BLK)
   Test point 2	Body ground

   Test circuit	GND
   Test point 1	Power window master switch 37P connector No. 31 (BLK)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   The GND wires are OK. Go to step 7 below.

   NO 

   Repair an open or high resistance in the ground wire or poor ground (G501).

7. Open wire check (B CAN lines)

   - 1. Disconnect the following connector.

   Keyless access control unit connector B (28P)

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

   Test condition	OFF mode
   	Power window master switch 37P connector: disconnected
   	Keyless access control unit connector B (28P): disconnected
   Test circuit	B CAN-H
   Test point 1	Power window master switch 37P connector No. 28 (PNK)
   Test point 2	Keyless access control unit connector B (28P) No. 6 (PNK)

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

   Is there continuity?

   YES 

   An open or poor connection in the B CAN-L wire between the keyless access control unit and the power window master switch.

   NO 

   An open or poor connection in the B CAN-H wire between the keyless access control unit and the power window master switch.

8. Open wire check (B CAN lines)

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

   Test condition	OFF mode
   	Power window master switch 37P connector: disconnected
   	Keyless access control unit connector B (28P): disconnected
   Test circuit	B CAN-H
   Test point 1	Power window master switch 37P connector No. 28 (PNK)
   Test point 2	Keyless access control unit connector B (28P) No. 6 (PNK)

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

   Is there continuity?

   YES 

   An open or poor connection in the B CAN-L wire between the keyless access control unit and the power window master switch.

   NO 

   An open or poor connection in the B CAN-H wire between the keyless access control unit and the power window master switch.