B1335
DTC B1335
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1335 0B
- Device Power 3 Circuit Current Above Threshold
DTC B1335 42
- Device Power 3 Circuit Calibration Data Set Not Programmed
DTC B1335 4B
- Device Power 3 Circuit Calibration Not Learned
Diagnostic Fault Information
Circuit/System Description
The memory seat module (MSM) monitors the current supplied to the driver seat adjuster motors, recline motor, and the lumbar horizontal motor. It can detect both absolute and differential current levels from the seat motors. Absolute current is the maximum allowable current the module will supply to the motors. A differential current mismatch occurs when the current supplied to the seat motors does not match the current returning from the motors.
Conditions for Running the DTC
The driver seat adjuster motors, recline motor, or the lumbar horizontal motor must be active.
Conditions for Setting the DTC
B1335 0B
The differential current measured through the high and low side of the power rail is within tolerance of each other, but the absolute current or an over-current has exceeded the maximum value.
B1335 42
This DTC will set if the module calibration is not programmed.
B1335 4B
This DTC will set if the module calibration is out of range.
Action Taken When the DTC Sets
All movement related to the seat cushion and recline motors is aborted.
Conditions for Clearing the DTC
* The current DTC will clear and set the code to history, 3 seconds after no motor movement is requested or the current is no longer mismatched, and the power mode changes to OFF then back to ACC or RUN.
* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.
Diagnostic Aids
The scan tool may reference the Memory Seat Module (MSM) as the Driver Position Module.
Reference Information
Schematic Reference
* Driver Seat Schematics (Driver Seat Schematics)
* Passenger Seat Schematics (Passenger Seat Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Memory Seats Description and Operation (Memory Seats)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing For Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
B1335 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 front vertical motor
* Driver seat rear vertical motor
* Driver seat horizontal motor
* Driver seat recline motor
* Driver seat lumbar horizontal motor
3. Clear the diagnostic trouble code.
4. Ignition OFF, disconnect the harness connector at the appropriate seat or lumbar motor for which the DTC set.
5. Ignition ON, operate the motor adjuster switch in both directions. DTC B1335 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.
* Driver seat front vertical motor terminal 2 X1 and terminal 5 X1
* Driver seat horizontal motor terminal 3 X1 and terminal 6 X1
* Driver seat rear vertical motor terminal 1 X1 and terminal 4 X1
* Driver seat recline motor terminal A and terminal B X1
* Driver seat lumbar horizontal motor terminal A and terminal B
6. Test the appropriate control circuits listed below for a high resistance.
* Driver seat front vertical motor terminal 2 X1 and terminal 5 X1
* Driver seat horizontal motor terminal 3 X1 and terminal 6 X1
* Driver seat rear vertical motor terminal 1 X1 and terminal 4 X1
* Driver seat recline motor terminal A and terminal B X1
* Driver seat lumbar horizontal motor terminal A and terminal B
7. If all circuits test normal, test or replace the appropriate seat or lumbar motor.
B1335 42 or B1335 4B
If either DTC is set history or current, replace the MSM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Front Seat Adjuster Replacement (Front Seat Adjuster Replacement)
* Front Seat Recliner Actuator Motor Replacement (Front Seat Recliner Actuator Motor Replacement)
* Driver or Passenger Seat Lumbar Support Replacement (w/AL2) (Driver or Passenger Seat Lumbar Support Replacement (W/AL2))Driver or Passenger Seat Lumbar Support Replacement (w/AM3) (Driver or Passenger Seat Lumbar Support Replacement (W/AM3))
* Control Module References (Programming and Relearning) for MSM replacement, setup, and programming