DTC B1836: Power Seat Position Sensor Circuit Short
| DTC Description | DTC |
|---|---|
| B1836 Power Seat Position Sensor circuit short |
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 ChecksBody 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 CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
- 1. Problem verification:
1. Clear the DTCs with the HDS.
2. Press the power switch button at least 20 times, then wait for at least 20 seconds.
3. Operate the power seat adjustment switch in all directions for more than 1 second each.
4. Check for DTCs with the HDS.
DTC Description DTC B1836 Power Seat Position Sensor Circuit Short Is DTC B1836 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- 2. Shorted wire check (SVCC line):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connectors.
Power seat control unit connector B (40P) Slide motor/position sensor 5P connector Front up-down motor/position sensor 5P connector Rear up-down motor/position sensor 5P connector: Recline motor/position sensor 5P connector 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Power seat control unit connector B (40P): disconnected
Slide motor/position sensor 5P connector: disconnected
Front up-down motor/position sensor 5P connector: disconnected
Rear up-down motor/position sensor 5P connector: disconnected
Recline motor/position sensor 5P connector: disconnected
Test point 1 Power seat control unit connector B (40P) No. 6 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
The SVCC wire is not shorted. Go to step 3.
- 3. Motor check (Slide):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Power seat control unit connector B (40P): disconnected
Slide motor/position sensor 5P connector: disconnected
Front up-down motor/position sensor 5P connector: disconnected
Rear up-down motor/position sensor 5P connector: disconnected
Recline motor/position sensor 5P connector: disconnected
Test point 1 Slide motor/position sensor 5P connector No. 4 Test point 2 Body ground (motor body) Is there continuity?
YES
Faulty front up-down motor/position sensor; replace the slide motor/position sensor .
NO
Go to step 4.
- 4. Motor check (Front up-down, Rear up-down, Recline):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Power seat control unit connector B (40P): disconnected
Slide motor/position sensor 5P connector: disconnected
Front up-down motor/position sensor 5P connector: disconnected
Rear up-down motor/position sensor 5P connector: disconnected
Recline motor/position sensor 5P connector: disconnected
Test point 1 Front up-down motor/position sensor 5P connector No. 3 Test point 2 Body ground (motor body) Test point 1 Rear up-down motor/position sensor 5P connector No. 3 Test point 2 Body ground (motor body) Test point 1 Recline motor/position sensor 5P connector No. 3 Test point 2 Body ground (motor body) Is there continuity?
Front up-down motor/position sensor is shorted
Faulty front up-down motor/position sensor; replace the front up-down motor/position sensor .
Rear up-down motor/position sensor is shorted
Faulty rear up-down motor/position sensor; replace the rear up-down motor/position sensor .
Recline motor/position sensor is shorted
Faulty recline motor/position sensor; replace the seat frame assembly .
NO
