DTC B1844: Power Seat Slide Switch Circuit Malfunction
| DTC Description | DTC |
|---|---|
| B1844 Power Seat Slide Switch Circuit Malfunction |
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. Operate the slide switch in each direction for more than 3 seconds.
3. Check for DTCs with the HDS.
DTC Description DTC B1844 Power Seat Slide Switch Circuit Malfunction Is DTC B1844 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 (SLFW, SLBW, SCOM lines):
1. Disconnect the following connectors.
Power seat control unit connector B (40P) Power seat adjustment switch 12P connector 2. Check for continuity between test points 1 and 2 individually.
Test condition Vehicle OFF (LOCK) mode Power seat control unit connector B (40P): disconnected
Power seat adjustment switch 12P connector: disconnected
Test point 1 Power seat control unit connector B (40P) No. 14 Test point 2 Body ground Test point 1 Power seat control unit connector B (40P) No. 37 Test point 2 Body ground Test point 1 Power seat control unit connector B (40P) No. 20 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire.
NO
The SLFW, SLBW, and SCOM wires are not shorted. Go to step 3.
- 3. Shorted wire check (SLFW line to SLBW, SCOM lines):
1. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode Power seat control unit connector B (40P): disconnected
Power seat adjustment switch 12P connector: disconnected
Test point 1 Power seat control unit connector B (40P) No. 14 Test point 2 Power seat control unit connector B (40P) No. 20 Test point 1 Power seat control unit connector B (40P) No. 37 Test point 2 Power seat control unit connector B (40P) No. 20 Test point 1 Power seat control unit connector B (40P) No. 14 Test point 2 Power seat control unit connector B (40P) No. 37 Is there continuity?
YES
Repair a short in the wire.
NO
The SLFW, SLBW, and SCOM wires are OK. Go to step 4.
- 4. Power seat adjustment switch check:
1. Test the driver's power seat adjustment switch - Refer to: Driver's Power Seat Adjustment Switch TestDriver's Power Seat Adjustment Switch Test(DPMS) .
Is the switch OK?
YES
Replace the power seat control unit .
NO
Replace the driver's power seat adjustment switch - Refer to: Driver's Power Seat Adjustment Switch Removal and InstallationDriver's Power Seat Adjustment Switch Removal and Installation(DPMS) .