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HOMESERVICE MANUALSACURA2015RLXREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATSPOWER SEAT SYSTEM - DIAGNOSTICS (EXCEPT HYBRID)TROUBLESHOOTINGDTC B1825
2015 Acura RLX

DTC B1825

2015 Acura RLXSECTION DTC 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)  

DTC (Power Seat Control Unit)

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. D15 (20 A) fuse in the driver's under-dash fuse/relay box. If the fuse blows again, check for a short to ground in the slide motor circuit.
  1. Problem verification

    -1. Clear the DTCs with the HDS.

    -2. Operate the power seat to its most forward and then to its most rearward position. (Two times)

    -3. 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.

  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 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.

  3. 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 5P connector
    Power seat control unit connector A (20P)

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

    Test condition Vehicle OFF (LOCK) mode
    Slide motor/position sensor 5P connector: disconnected
    Power seat control unit connector A (20P): disconnected
    Test circuit SLSE
    Test point 1 Slide motor/position sensor 5P connector No. 2 (BRN)
    Test point 2 Power seat control unit connector A (20P) No. 8 (BRN)
    Test circuit SEG
    Test point 1 Slide motor/position sensor 5P connector No. 3 (WHT)
    Test point 2 Power seat control unit connector A (20P) No. 19 (WHT)
    GHH349885Courtesy of HONDA, U.S.A., INC.

    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.

  4. Shorted wire check (SLSE line)

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

    Test condition Vehicle OFF (LOCK) mode
    Slide motor/position sensor 5P connector: disconnected
    Power seat control unit connector A (20P): disconnected
    Test circuit SLSE
    Test point 1 Power seat control unit connector A (20P) No. 8 (BRN)
    Test point 2 Body ground
    GHH349886Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short to ground in the wire.

    NO 

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

  5. Slide position sensor check

    -1. Reconnect power seat control unit connector A (20P).

    -2. Turn the vehicle to the ON mode.

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

    Test condition Vehicle ON mode
    Slide motor/position sensor 5P connector: disconnected
    Test circuit SLSE, SEG
    Test point 1 Slide motor/position sensor 5P connector No. 2 (BRN) (+)
    Test point 2 Slide motor/position sensor 5P connector No. 3 (WHT) (-)
    GHH349887Courtesy of HONDA, U.S.A., INC.

    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).

  6. Open wire check (SVCC, SEG lines)

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

    -2. Disconnect the following connectors.

    Slide motor/position sensor 5P connector
    Power seat control unit connector A (20P)

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

    Test condition Vehicle OFF (LOCK) mode
    Slide motor/position sensor 5P connector: disconnected
    Power seat control unit connector A (20P): disconnected
    Test circuit SVCC
    Test point 1 Slide motor/position sensor 5P connector No. 4 (PUR)
    Test point 2 Power seat control unit connector A (20P) No. 6 (PUR)
    Test circuit SEG
    Test point 1 Slide motor/position sensor 5P connector No. 3 (WHT)
    Test point 2 Power seat control unit connector A (20P) No. 19 (WHT)
    GHH349888Courtesy of HONDA, U.S.A., INC.

    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.

  7. Power seat control unit check

    -1. Reconnect power seat control unit connector A (20P).

    -2. Turn the vehicle to the ON mode.

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

    Test condition Vehicle ON mode
    Slide motor/position sensor 5P connector: disconnected
    Test circuit SVCC, SEG
    Test point 1 Power seat control unit connector A (20P) No. 6 (PUR)
    Test point 2 Power seat control unit connector A (20P) No. 19 (WHT)
    GHH349889Courtesy of HONDA, U.S.A., INC.

    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 .

  8. Fuse check

    -1. Check the following fuse.

    Fuse No. D15 (20 A)
    Location Driver's 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. D15 (20 A) fuse circuit.

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

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

    Test condition Vehicle OFF (LOCK) mode
    Test circuit VMP1
    Test point 1 Power seat control unit connector B (12P) No. 6 (BLU)
    Test point 2 Body ground
    GHH349890Courtesy of HONDA, U.S.A., INC.

    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 (GND1 line)

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

    Test condition Vehicle OFF (LOCK) mode
    Test circuit GND1
    Test point 1 Power seat control unit connector B (12P) No. 2 (BLU)
    Test point 2 Body ground
    GHH349891Courtesy of HONDA, U.S.A., INC.

    Is there 0.2 V or more?

    YES 

    Repair an open or high resistance in the ground wire or poor ground (G801).

    NO 

    The GND1 wire is not open. Go to step 11.

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

    -1. Disconnect the following connectors.

    Slide motor/position sensor 5P connector
    Power seat control unit connector B (12P)

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

    Test condition Vehicle OFF (LOCK) mode
    Slide motor/position sensor 5P connector: disconnected
    Power seat control unit connector B (12P): disconnected
    Test circuit SLIDE MTR FR
    Test point 1 Slide motor/position sensor 5P connector No. 5 (YEL)
    Test point 2 Power seat control unit connector B (12P) No. 3 (YEL)
    Test circuit SLIDE MTR RR
    Test point 1 Slide motor/position sensor 5P connector No. 1 (WHT)
    Test point 2 Power seat control unit connector B (12P) No. 1 (WHT)
    GHH349892Courtesy of HONDA, U.S.A., INC.

    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)

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

    Test condition Vehicle OFF (LOCK) mode
    Slide motor/position sensor 5P connector: disconnected
    Power seat control unit connector B (12P): disconnected
    Test circuit SLIDE MTR FR
    Test point 1 Slide motor/position sensor 5P connector No. 5 (YEL)
    Test point 2 Body ground
    Test circuit SLIDE MTR RR
    Test point 1 Slide motor/position sensor 5P connector No. 1 (WHT)
    Test point 2 Body ground
    GHH349893Courtesy of HONDA, U.S.A., INC.

    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

    -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 .

RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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