B1335

DTC B1335

Circuit Description

Battery positive voltage is supplied to the memory seat module (MSM)/driver position module (DPM) from the seats circuit breaker located in the left rear fuse block. When commanded, this voltage is used by the MSM/DPM to power the seat motors through the motor control circuits. During memory recall functions and manual seat functions, the driven motor current is monitored through the motor control circuits by the MSM/DPM. When an overcurrent condition is detected, the MSM/DPM disables the seat motors in order to protect the internal MSM/DPM circuitry.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1335 Device Power 3 Circuit Range/Performance

Conditions for Running the DTC

The MSM/DPM monitors for overcurrent only when the seat motors are active.

Conditions for Setting the DTC

The MSM/DPM will set DTC B1335 when the measured current exceeds 81 amps for 100 milliseconds.

Action Taken When the DTC Sets

* All memory recalls in progress are aborted.
* The MSM/DPM will not respond to manual movements of the affected motor.

Conditions for Clearing the DTC

The MSM/DPM does not detect an overcurrent condition during seat movement.

Diagnostic Aids

The MSM is also known as the DPM for this vehicle.

Test Description

Step 1 - Step 9:

The numbers below refer to the step numbers on the diagnostic table.
2. This test determines which directional motor exhibits excessive current.
3. This test determines if the suspect motor has an internal short to ground.
9. This test verifies the repair.