DTC B1828: Recline Pulse Error (No Change in Pulse for 1 Second)

DTC Description	DTC
B1828 Recline Pulse Error (No Change in Pulse for 1 Second)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .

NOTE: If DTC B1827 and B1828 are both indicated, check for a blown No. B17 (20 A) fuse in the under-dash fuse/relay box. If the fuse blows again, check for a short to ground in the recline motor circuit.

1. Problem verification:

1. Clear the DTCs with the HDS.

2. Press the engine start/stop button at least 20 times, then wait for at least 20 seconds.

3. Operate the power seat adjustment switch for several seconds in each direction.

NOTE: DTC B1828 is stored when the recline switch is operated more than 1 second after the seat moves to the most forward or backward position, even when the system is OK.

4. Check for DTCs with the HDS.

DTC Description	DTC
B1828 Recline Pulse Error (No Change in Pulse for 1 Second)

Is DTC B1828 indicated?

DTC B1828 is indicated

Go to step 2.

DTC B1836 is also indicated

Go to the DTC B1836 troubleshooting.

DTC B1825, B1826, and/or B1827 are also indicated

Go to step 6.

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

2. Determine possible failure area (motor operation, motor sensor):
1. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

2. Operate the rear recline switch for 2 seconds, and check the recline motor operation.

Does the recline motor run smoothly?

YES

Go to step 3.

NO

Go to step 8.

3. Open wire check (RESE, SEG lines):

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

2. Disconnect the following connectors.

Recline motor/position sensor 5P connector

Power seat control unit connector B (40P)

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

Test condition

Vehicle OFF (LOCK) mode

Recline motor/position sensor 5P connector: disconnected

Power seat control unit connector B (40P): disconnected

Test point 1

Recline motor/position sensor 5P connector No. 1

Test point 2

Power seat control unit connector B (40P) No. 11

Test point 1	Recline motor/position sensor 5P connector No. 2
Test point 2	Power seat control unit connector B (40P) No. 32

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

Is there continuity?

YES

The RESE and SEG wires are not open. Go to step 4.

Repair an open or high resistance in the wire.

4. Shorted wire check (RESE line):

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

Test condition

Vehicle OFF (LOCK) mode

Recline motor/position sensor 5P connector: disconnected

Power seat control unit connector B (40P): disconnected

Test point 1

Power seat control unit connector B (40P) No. 11

Test point 2

Body ground

Is there continuity?

YES

Repair a short to ground in the wire.

The RESE wire is not shorted. Go to step 5.

5. Recline position sensor check:

1. Reconnect power seat control unit connector B (40P).

2. Turn the vehicle to the ON mode.

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

Test condition	Vehicle ON mode Recline motor/position sensor 5P connector: disconnected
Test point 1	Recline motor/position sensor 5P connector No. 1 (+)
Test point 2	Recline motor/position sensor 5P connector No. 2 (-)

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

Is there about 5 V?

About 5 V

Faulty recline motor/position sensor; replace the seat frame assembly .

No voltage

Replace the power seat control unit .

Battery voltage

Repair a short to power in the wire (sensor line).

6. Open wire check (SVCC, SEG lines):

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

2. Disconnect the following connectors.

Recline motor/position sensor 5P connector

Power seat control unit connector B (40P)

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

Test condition

Vehicle OFF (LOCK) mode

Recline motor/position sensor 5P connector: disconnected

Power seat control unit connector B (40P): disconnected

Test point 1

Recline motor/position sensor 5P connector No. 3

Test point 2

Power seat control unit connector B (40P) No. 6

Test point 1	Recline motor/position sensor 5P connector No. 2
Test point 2	Power seat control unit connector B (40P) No. 32

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

Is there continuity?

YES

The SVCC and SEG wires are OK. Go to step 7.

Repair an open or high resistance in the wire.

7. Power seat control unit check:

1. Reconnect power seat control unit connector B (40P).

2. Turn the vehicle to the ON mode.

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

Test condition	Vehicle ON mode Recline motor/position sensor 5P connector: disconnected
Test point 1	Power seat control unit connector B (40P) No. 6

Test point 2

Power seat control unit connector B (40P) No. 32

Is there battery voltage when the recline switch is operated?

YES

Faulty recline motor/position sensor; replace the seat frame assembly .

Replace the power seat control unit .

8. Fuse check:

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

2. Check the following fuse.

Fuse	No. B17 (20 A)
Location	Under-dash fuse/relay box

Is the fuse OK?

YES

Go to step 9.

Replace the fuse. If the fuse blows again, repair the short to ground in the No. B17 (20 A) fuse circuit.

9. Open wire check (+B P/SEAT HT/REC(20A) line):

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

Test condition	Vehicle OFF (LOCK) mode
Test point 1	Power seat control unit connector A (18P) No. 8
Test point 2	Body ground

Is there battery voltage?

YES

The +B P/SEAT HT/REC(20A) wire is not open. Go to step 10.

Repair an open or high resistance in the wire.

10. Open wire check (PG2 line):

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

Test condition	Vehicle OFF (LOCK) mode
Test point 1	Power seat control unit connector A (18P) No. 5
Test point 2	Body ground

Is there 0.2 V or more?

YES

Repair an open or high resistance in the ground wire or poor ground (G601).

The PG2 wire is not open. Go to step 11.

11. Open wire check (REC MTR FR, REC MTR RR lines):

1. Disconnect the following connectors.

Recline motor/position sensor 5P connector

Power seat control unit connector A (18P)

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

Test condition

Vehicle OFF (LOCK) mode

Recline motor/position sensor 5P connector: disconnected

Power seat control unit connector A (18P): disconnected

Test point 1

Recline motor/position sensor 5P connector No. 5

Test point 2

Power seat control unit connector A (18P) No. 18

Test point 1	Recline motor/position sensor 5P connector No. 4
Test point 2	Power seat control unit connector A (18P) No. 16

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

Is there continuity?

YES

The REC MTR FR and REC MTR RR wires are not open. Go to step 12.

Repair an open or high resistance in the wire.

12. Shorted wire check (REC MTR FR, REC MTR RR lines):

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

Test condition

Vehicle OFF (LOCK) mode

Recline motor/position sensor 5P connector: disconnected

Power seat control unit connector A (18P): disconnected

Test point 1

Recline motor/position sensor 5P connector No. 5

Test point 2

Body ground

Test point 1	Recline motor/position sensor 5P connector No. 4
Test point 2	Body ground

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

Is there continuity?

YES

Repair a short to ground in the wire.

The REC MTR FR and REC MTR RR wires are OK. Go to step 13.

13. Recline motor check:
1. Test the recline motor .

Is the motor OK?

YES

Replace the power seat control unit .

NO

Faulty recline motor/position sensor; replace the seat frame assembly .