Circuit/System Testing: Notes
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
B1335 00 or B1335 0B
- Use a scan tool to clear the current and history diagnostic trouble code.
- 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 front vertical motor
- Driver seat rear vertical motor
- Driver seat horizontal motor
- Driver seat recline motor
- Driver seat lumbar horizontal motor
- Use a scan tool to clear the current and history diagnostic trouble code.
- Ignition OFF, disconnect the X1 harness connector at the seat or lumbar motor for which the DTC set.
- Ignition ON, operate the motor in both directions then verify that the DTC set.
- If the DTC did not set, test or replace the motor.
- Ignition OFF, disconnect the appropriate X1, X4 harness connector at the MSM.
- Ignition ON, test for 0 volt between each motor control circuit and ground.
- If greater than 0 volt, test the control circuit for a short to voltage.
- Test for infinite resistance between each control circuit and ground.
- If less than infinite resistance, repair the control circuit for a short to ground.
- Test for infinite resistance between the motor control circuits:
- If less than infinite resistance, test for a short between the control circuits.
- If all circuits test normal, test or replace the MSM.