Circuit/System Testing

DTCs B1340 00 or B1340 0B

1. Use a scan tool to clear the current and history diagnostic trouble code.
2. Ignition ON, determine which motor set this DTC by operating the following motors one at a time in both directions. Check for the DTC to set between each motor test.
   • Driver seat lumbar vertical motor
   • Passenger seat lumbar vertical motor
   • Steering column tilt motor
   • Steering column telescope motor
3. Use a scan tool to clear the current and history diagnostic trouble code.
4. Ignition OFF, disconnect the harness connector at the lumbar motor or steering column actuator for which the DTC set.
5. Ignition ON, operate the motor/actuator in both directions then verify that the DTC set.
   • If the DTC did not set, test or replace the motor/actuator.
6. Ignition OFF, disconnect the appropriate (C1 or C4) harness connector at the memory seat module.
7. Ignition ON, test for 0 volts between each motor/actuator control circuit and ground.
   • If greater than 0 volts, test the control circuit for a short to voltage.
8. Test for infinite resistance between each control circuit and ground.
   • If less than infinite resistance, test the control circuit for a short to ground.
9. Test for infinite resistance between the motor/actuator control circuits:
   • If less than infinite resistance, test for a short between the control circuits.
10. If all circuits test normal, test or replace the memory seat module.

DTCs B1340 42 or B1340 4B 

If either DTC is set history or current, the only option is module replacement.