Circuit/System Testing

B1340 00 or B1340 0B

1. Ignition ON, use a scan tool to clear the current and history diagnostic trouble code.
2. Determine which motor set this DTC by operating the motors listed below one at a time in both directions. Check for the DTC to set between each motor test.
   • Driver Seat Lumbar Vertical Motor
   • Steering Column Tilt Motor
   • Steering Column Telescope Motor
3. Clear the diagnostic trouble codes.
4. Ignition OFF, disconnect the harness connector at the appropriate lumbar motor or steering column motor for which the DTC set.
5. Ignition ON, operate the motor adjuster switch in both directions. DTC B1340 00 or B1340 0B should not set.
   • If the DTC sets, test for a short between the appropriate motor control circuits listed below. If the circuits test normal, replace the MSM.
   • Lumbar vertical motor terminal 1 and terminal 5
   • Steering column telescope motor terminal C and terminal D
   • Steering column tilt motor terminal A and terminal B
6. Test the appropriate control circuits listed below for a high resistance. If the circuits test normal, test or replace the appropriate lumbar motor or steering column motor.
   • Lumbar vertical motor terminal 1 and terminal 5
   • Steering column telescope motor terminal C and terminal D
   • Steering column tilt motor terminal A and terminal B

B1340 42 or B1340 4B 

If either DTC is set, replace the MSM.