DTC B1837: Driving Position Memory Recall Timeout

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
Make sure you have the latest software on the HDS before troubleshooting.

Turn the ignition switch ON (II) and clear the DTCs with the HDS.
Turn the ignition switch OFF, and then back to ON (II).
Use the front up-down switch to raise the front of the seat as high as it will go.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will beset.
Use the rear up-down switch to raise the rear of the seat as high as it will go.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will be set.
Use the slide switch to move the seat to the rear as far as it will go.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will be set.
Use the recline switch to move the seat-back forward as far as it will go.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will beset.
Memorize this seat position with the memory switches.
Use the seat switches to move the seat to its opposite limits (front and rear all the way down, seat fully forward, and seat-back fully reclined).
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will be set.
Recall the seat position with the driving position memory switch.
Wait for 3 minutes.
Check for DTCs with the HDS.
Are any DTCs indicated?

YES - Go to step 12.

NO - Intermittent failure. The driving position memory system is OK at this time. Check for loose or poor connections and terminal fit at the DPMS connectors. Check the battery condition, battery cable connections, and ground G601.
Check for DTCs with the HDS.
Are any DTCs except B1837 indicated?

YES - Go to the indicated DTCs troubleshooting.

NO - Go to step 13.
Clear the DTCs with the HDS and wait for 6 seconds.
Move the power seat (slide forward/backward, recline forward/backward, front up-down, rear up-down) motors one at a time, and check the operation time.
NOTE: Do not hold the switch for more than 1 second after the seat reaches a position limit or a DTC will be set.

Does any motor fail to run smoothly?

YES - Go to the power seat motor test (see DRIVER'S POWER SEAT MOTOR TEST ). If the motor is OK, check the engagement of the motor gear.

NO - Go to the power seat control unit input test (see POWER SEAT CONTROL UNIT INPUT TEST ).