DTC Troubleshooting: B1825

DTC B1825: Slide Pulse Error(no change in pulse for 1 second)

DTC Description	DTC
B1825 Slide 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.
	If DTC B1825 and B1826 are both indicated, check for a blown No. B36 (20 A) fuse in the under-dash fuse/relay box. If the fuse blows again, check for a short to ground in the slide motor circuit.

Problem verification:

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 B1825 is stored when the slide 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
B1825 Slide pulse error(no change in pulse for 1 second)

Is DTC B1825 indicated?


	DTC B1825 is indicated

Go to step 2.


	DTC B1836 is also indicated

Go to the DTC B1836 troubleshooting.?


	DTC B1826, B1827, and/or B1828 are also indicated

Go to step 6.


	NO

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

Determine possible failure area (motor operation, motor sensor):

Determine possible failure area (motor operation, motor sensor)

?1.	Press the engine start/stop button to select the OFF mode and then the ON mode.

?2.	Operate the slide switch for 2 seconds, and check the slide motor operation.

Does the slide motor run smoothly?


	YES

Go to step 3.


	NO

Go to step 8.

Open wire check (SLSE, SEG lines):

Open wire check (SLSE, SEG lines)

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

?2.

Disconnect the following connectors.

Slide motor/position sensor 6P connector

Power seat control unit connector B (20P)

?3.

Check for continuity between test points 1 and 2 respectively.

Test condition	OFF mode Slide motor/position sensor 6P connector: disconnected Power seat control unit connector B (20P): disconnected
Test circuit	SLSE
Test point 1	Slide motor/position sensor 6P connector No. 2 (BRN)
Test point 2	Power seat control unit connector B (20P) No. 8 (BRN)

Test circuit	SEG
Test point 1	Slide motor/position sensor 6P connector No. 6 (WHT)
Test point 2	Power seat control unit connector B (20P) No. 19 (WHT)

Is there continuity?


	YES

The SLSE, SEG wires are not open. Go to step 4.


	NO

Repair an open or high resistance in the wire.?

Shorted wire check (SLSE line):

Shorted wire check (SLSE line)

?1.

Check for continuity between test points 1 and 2.

Test condition	OFF mode Slide motor/position sensor 6P connector: disconnected Power seat control unit connector B (20P): disconnected
Test circuit	SLSE
Test point 1	Power seat control unit connector B (20P) No. 8 (BRN)
Test point 2	Body ground

Is there continuity?


	YES

Repair a short to ground in the wire.?


	NO

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

Slide position sensor check:

Slide position sensor check

?1.	Reconnect power seat control unit connector B (20P).

?2.	Press the engine start/stop button to select the ON mode.

?3.

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

Test condition	ON mode Slide motor/position sensor 6P connector: disconnected
Test circuit	SLSE, SEG
Test point 1	Slide motor/position sensor 6P connector No. 2 (BRN) (+)
Test point 2	Slide motor/position sensor 6P connector No. 6 (WHT) (-)

Is there about 5 V?


	About 5 V

Faulty slide 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).?

Open wire check (SVCC, SEG lines):

Open wire check (SVCC, SEG lines)

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

?2.

Disconnect the following connectors.

Slide motor/position sensor 6P connector

Power seat control unit connector B (20P)

?3.

Check for continuity between test points 1 and 2 respectively.

Test condition	OFF mode Slide motor/position sensor 6P connector: disconnected Power seat control unit connector B (20P): disconnected
Test circuit	SVCC
Test point 1	Slide motor/position sensor 6P connector No. 5 (PUR)
Test point 2	Power seat control unit connector B (20P) No. 6 (PUR)

Test circuit	SEG
Test point 1	Slide motor/position sensor 6P connector No. 6 (WHT)
Test point 2	Power seat control unit connector B (20P) No. 19 (WHT)

Is there continuity?


	YES

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


	NO

Repair an open or high resistance in the wire.?

Power seat control unit check:

Power seat control unit check

?1.	Reconnect power seat control unit connector B (20P).

?2.	Press the engine start/stop button to select the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	ON mode Slide motor/position sensor 6P connector: disconnected
Test circuit	SVCC, SEG
Test point 1	Power seat control unit connector B (20P) No. 6 (PUR)
Test point 2	Power seat control unit connector B (20P) No. 19 (WHT)

Is there battery voltage when the slide switch is operated?


	YES

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


	NO

Replace the power seat control unit.?

Fuse check:

Fuse check

?1.

Check the following fuse.

Fuse	No. B36 (20 A)
Location	Under-dash fuse/relay box

Is the fuse OK?


	YES

Go to step 9.


	NO

Replace the fuse. If the fuse blows again, repair the short to ground in the No. B36 (20 A) fuse circuit.?

Open wire check (+B DR P/SEAT SLIDE/VMP1 line):

Open wire check (+B DR P/SEAT SLIDE/VMP1 line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	OFF mode
Test circuit	VMP1

2-door

Test point 1	Power seat control unit connector A (12P) No. 6 (PUR)
Test point 2	Body ground

4-door

Test point 1	Power seat control unit connector A (12P) No. 6 (LT BLU)
Test point 2	Body ground

Is there battery voltage?


	YES

The +B DR P/SEAT SLIDE/VMP1 wire is not open. Go to step 10.


	NO

Repair an open or high resistance in the wire.?

10.

Open wire check (PG 1 line):

Open wire check (PG 1 line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	OFF mode
Test circuit	PG 1

2-door

Test point 1	Power seat control unit connector A (12P) No. 2 (PNK)
Test point 2	Body ground

4-door

Test point 1	Power seat control unit connector A (12P) No. 2 (GRY)
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 (G651).?


	NO

The PG 1 wire is not open. Go to step 11.

11.

Open wire check (SLIDE MTR FR, SLIDE MTR RR lines):

Open wire check (SLIDE MTR FR, SLIDE MTR RR lines)

?1.

Disconnect the following connectors.

Slide motor/position sensor 6P connector

Power seat control unit connector A (12P)

?2.

Check for continuity between test points 1 and 2 respectively.

Test condition	OFF mode Slide motor/position sensor 6P connector: disconnected Power seat control unit connector A (12P): disconnected
Test circuit	SLIDE MTR FR
Test point 1	Slide motor/position sensor 6P connector No. 3 (YEL)
Test point 2	Power seat control unit connector A (12P) No. 3 (YEL)

Test circuit	SLIDE MTR RR
Test point 1	Slide motor/position sensor 6P connector No. 4 (WHT)
Test point 2	Power seat control unit connector A (12P) No. 1 (WHT)

Is there continuity?


	YES

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


	NO

Repair an open or high resistance in the wire.?

12.

Shorted wire check (SLIDE MTR FR, SLIDE MTR RR lines):

Shorted wire check (SLIDE MTR FR, SLIDE MTR RR lines)

?1.

Check for continuity between test points 1 and 2 individually.

Test condition	OFF mode Slide motor/position sensor 6P connector: disconnected Power seat control unit connector A (12P): disconnected
Test circuit	SLIDE MTR FR
Test point 1	Slide motor/position sensor 6P connector No. 3 (YEL)
Test point 2	Body ground

Test circuit	SLIDE MTR RR
Test point 1	Slide motor/position sensor 6P connector No. 4 (WHT)
Test point 2	Body ground

Is there continuity?


	YES

Repair a short to ground in the wire.?


	NO

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

13.

Slide motor check:

Slide motor check

?1.	Test the slide motor.

Is the motor OK?


	YES

Replace the power seat control unit.?


	NO

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